automapper_validation/generated/fv2504/

utilts_conditions_fv2504.rs

// <auto-generated>
// Generated by automapper-generator generate-conditions
// AHB: xml-migs-and-ahbs/FV2504/UTILTS_AHB_1_0_Fehlerkorrektur_20250218.xml
// Generated: 2026-03-12T10:04:46Z
// </auto-generated>

// LLM-produced bodies aren't idiomatic Rust — silence stylistic lints at
// file scope so `cargo clippy -D warnings` stays green. Correctness,
// suspicious, and perf categories stay on so real bugs still surface.
#![allow(clippy::style, clippy::complexity)]

#[allow(unused_imports)]
use crate::eval::format_validators::*;
use crate::eval::{Cluster, ConditionEvaluator, ConditionResult, EvaluationContext};
// HAND-EDITED: shared cluster helper for condition [61].
// Preserve across regeneration — see CLAUDE.md "Codelist Providers".
use crate::eval::ebd_cluster::any_sts_e01_in_cluster;

/// Generated condition evaluator for UTILTS FV2504.
pub struct UtiltsConditionEvaluatorFV2504 {
    // External condition IDs that require runtime context.
    external_conditions: std::collections::HashSet<u32>,
}

impl Default for UtiltsConditionEvaluatorFV2504 {
    fn default() -> Self {
        let mut external_conditions = std::collections::HashSet::new();
        external_conditions.insert(1);
        external_conditions.insert(22);
        external_conditions.insert(25);
        external_conditions.insert(26);
        external_conditions.insert(37);
        // HAND-EDITED: [61] is no longer external — EBD cluster lookup handles it.
        // external_conditions.insert(61);
        external_conditions.insert(62);
        Self {
            external_conditions,
        }
    }
}

impl ConditionEvaluator for UtiltsConditionEvaluatorFV2504 {
    fn message_type(&self) -> &str {
        "UTILTS"
    }

    fn format_version(&self) -> &str {
        "FV2504"
    }

    fn evaluate(&self, condition: u32, ctx: &EvaluationContext) -> ConditionResult {
        match condition {
            1 => self.evaluate_1(ctx),
            2 => self.evaluate_2(ctx),
            5 => self.evaluate_5(ctx),
            6 => self.evaluate_6(ctx),
            7 => self.evaluate_7(ctx),
            8 => self.evaluate_8(ctx),
            9 => self.evaluate_9(ctx),
            10 => self.evaluate_10(ctx),
            11 => self.evaluate_11(ctx),
            12 => self.evaluate_12(ctx),
            13 => self.evaluate_13(ctx),
            14 => self.evaluate_14(ctx),
            15 => self.evaluate_15(ctx),
            21 => self.evaluate_21(ctx),
            22 => self.evaluate_22(ctx),
            24 => self.evaluate_24(ctx),
            25 => self.evaluate_25(ctx),
            26 => self.evaluate_26(ctx),
            27 => self.evaluate_27(ctx),
            29 => self.evaluate_29(ctx),
            30 => self.evaluate_30(ctx),
            31 => self.evaluate_31(ctx),
            32 => self.evaluate_32(ctx),
            33 => self.evaluate_33(ctx),
            34 => self.evaluate_34(ctx),
            36 => self.evaluate_36(ctx),
            37 => self.evaluate_37(ctx),
            41 => self.evaluate_41(ctx),
            42 => self.evaluate_42(ctx),
            43 => self.evaluate_43(ctx),
            44 => self.evaluate_44(ctx),
            46 => self.evaluate_46(ctx),
            47 => self.evaluate_47(ctx),
            48 => self.evaluate_48(ctx),
            49 => self.evaluate_49(ctx),
            50 => self.evaluate_50(ctx),
            53 => self.evaluate_53(ctx),
            54 => self.evaluate_54(ctx),
            55 => self.evaluate_55(ctx),
            56 => self.evaluate_56(ctx),
            57 => self.evaluate_57(ctx),
            58 => self.evaluate_58(ctx),
            59 => self.evaluate_59(ctx),
            61 => self.evaluate_61(ctx),
            62 => self.evaluate_62(ctx),
            490 => self.evaluate_490(ctx),
            491 => self.evaluate_491(ctx),
            494 => self.evaluate_494(ctx),
            501 => self.evaluate_501(ctx),
            502 => self.evaluate_502(ctx),
            504 => self.evaluate_504(ctx),
            505 => self.evaluate_505(ctx),
            506 => self.evaluate_506(ctx),
            507 => self.evaluate_507(ctx),
            508 => self.evaluate_508(ctx),
            509 => self.evaluate_509(ctx),
            510 => self.evaluate_510(ctx),
            511 => self.evaluate_511(ctx),
            512 => self.evaluate_512(ctx),
            513 => self.evaluate_513(ctx),
            514 => self.evaluate_514(ctx),
            515 => self.evaluate_515(ctx),
            516 => self.evaluate_516(ctx),
            517 => self.evaluate_517(ctx),
            518 => self.evaluate_518(ctx),
            519 => self.evaluate_519(ctx),
            520 => self.evaluate_520(ctx),
            521 => self.evaluate_521(ctx),
            522 => self.evaluate_522(ctx),
            523 => self.evaluate_523(ctx),
            524 => self.evaluate_524(ctx),
            525 => self.evaluate_525(ctx),
            526 => self.evaluate_526(ctx),
            527 => self.evaluate_527(ctx),
            528 => self.evaluate_528(ctx),
            529 => self.evaluate_529(ctx),
            530 => self.evaluate_530(ctx),
            531 => self.evaluate_531(ctx),
            532 => self.evaluate_532(ctx),
            533 => self.evaluate_533(ctx),
            534 => self.evaluate_534(ctx),
            912 => self.evaluate_912(ctx),
            913 => self.evaluate_913(ctx),
            914 => self.evaluate_914(ctx),
            915 => self.evaluate_915(ctx),
            930 => self.evaluate_930(ctx),
            931 => self.evaluate_931(ctx),
            932 => self.evaluate_932(ctx),
            933 => self.evaluate_933(ctx),
            937 => self.evaluate_937(ctx),
            939 => self.evaluate_939(ctx),
            940 => self.evaluate_940(ctx),
            947 => self.evaluate_947(ctx),
            950 => self.evaluate_950(ctx),
            951 => self.evaluate_951(ctx),
            960 => self.evaluate_960(ctx),
            963 => self.evaluate_963(ctx),
            964 => self.evaluate_964(ctx),
            965 => self.evaluate_965(ctx),
            969 => self.evaluate_969(ctx),
            2001 => self.evaluate_2001(ctx),
            2002 => self.evaluate_2002(ctx),
            2004 => self.evaluate_2004(ctx),
            2005 => self.evaluate_2005(ctx),
            2006 => self.evaluate_2006(ctx),
            2007 => self.evaluate_2007(ctx),
            _ => ConditionResult::Unknown,
        }
    }

    fn is_external(&self, condition: u32) -> bool {
        self.external_conditions.contains(&condition)
    }
    fn is_known(&self, condition: u32) -> bool {
        matches!(
            condition,
            1 | 2
                | 5
                | 6
                | 7
                | 8
                | 9
                | 10
                | 11
                | 12
                | 13
                | 14
                | 15
                | 21
                | 22
                | 24
                | 25
                | 26
                | 27
                | 29
                | 30
                | 31
                | 32
                | 33
                | 34
                | 36
                | 37
                | 41
                | 42
                | 43
                | 44
                | 46
                | 47
                | 48
                | 49
                | 50
                | 53
                | 54
                | 55
                | 56
                | 57
                | 58
                | 59
                | 61
                | 62
                | 490
                | 491
                | 494
                | 501
                | 502
                | 504
                | 505
                | 506
                | 507
                | 508
                | 509
                | 510
                | 511
                | 512
                | 513
                | 514
                | 515
                | 516
                | 517
                | 518
                | 519
                | 520
                | 521
                | 522
                | 523
                | 524
                | 525
                | 526
                | 527
                | 528
                | 529
                | 530
                | 531
                | 532
                | 533
                | 534
                | 912
                | 913
                | 914
                | 915
                | 930
                | 931
                | 932
                | 933
                | 937
                | 939
                | 940
                | 947
                | 950
                | 951
                | 960
                | 963
                | 964
                | 965
                | 969
                | 2001
                | 2002
                | 2004
                | 2005
                | 2006
                | 2007
        )
    }
}

impl UtiltsConditionEvaluatorFV2504 {
    /// [8] Rechenschrittidentifikator aus einem SG8 SEQ+Z37 (Bestandteil des Rechenschritts) DE1050 desselben SG5 IDE+24 und derselben Zeitraum-ID wie bei diesem SG8
    // REVIEW: Validates that RFF+Z23 references in SG8 SEQ+Z37 instances point to existing SEQ+Z37 DE1050 values. Follows the Example 27 pattern with SG5/SG8 group path. The Zeitraum-ID same-scope constraint and same-SG5 IDE+24 scoping are not fully enforced — cross-SG5 step IDs could be accepted — but within a single-transaction UTILTS message this is typically equivalent. RFF+Z23 is the standard Rechenschrittidentifikator reference qualifier based on Example 27. (medium confidence)
    fn evaluate_8(&self, ctx: &EvaluationContext) -> ConditionResult {
        let nav = match ctx.navigator() {
            Some(n) => n,
            None => return ConditionResult::Unknown,
        };
        let sg8_count = nav.group_instance_count(&["SG5", "SG8"]);
        let mut valid_ids: std::collections::HashSet<String> = std::collections::HashSet::new();
        for i in 0..sg8_count {
            let seq_segs = nav.find_segments_in_group("SEQ", &["SG5", "SG8"], i);
            for seq in &seq_segs {
                if seq
                    .elements
                    .first()
                    .and_then(|e| e.first())
                    .is_some_and(|v| v == "Z37")
                {
                    if let Some(val) = seq.elements.get(1).and_then(|e| e.first()) {
                        if !val.is_empty() {
                            valid_ids.insert(val.clone());
                        }
                    }
                }
            }
        }
        if valid_ids.is_empty() {
            return ConditionResult::Unknown;
        }
        for i in 0..sg8_count {
            let rff_segs = nav.find_segments_in_group("RFF", &["SG5", "SG8"], i);
            for rff in &rff_segs {
                if rff
                    .elements
                    .first()
                    .and_then(|e| e.first())
                    .is_some_and(|v| v == "Z23")
                {
                    if let Some(ref_val) = rff.elements.first().and_then(|e| e.get(1)) {
                        if !ref_val.is_empty() && !valid_ids.contains(ref_val) {
                            return ConditionResult::False;
                        }
                    }
                }
            }
        }
        ConditionResult::True
    }

    /// [9] Der hier angegebene Rechenschrittidentifikator darf nicht identisch mit dem Rechenschrittidentifikator aus diesem SG8 SEQ+Z37 DE1050 sein
    // REVIEW: Checks that within each SG8 SEQ+Z37 instance, the RFF+Z23 reference value does not equal the current SG8's own SEQ DE1050 Rechenschrittidentifikator (no self-reference). Iterates all SG8 instances globally and returns False on first self-referential cycle detected. (medium confidence)
    fn evaluate_9(&self, ctx: &EvaluationContext) -> ConditionResult {
        let nav = match ctx.navigator() {
            Some(n) => n,
            None => return ConditionResult::Unknown,
        };
        let sg8_count = nav.group_instance_count(&["SG5", "SG8"]);
        for i in 0..sg8_count {
            let seq_segs = nav.find_segments_in_group("SEQ", &["SG5", "SG8"], i);
            let own_id = seq_segs
                .iter()
                .find(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|v| v == "Z37")
                })
                .and_then(|s| s.elements.get(1))
                .and_then(|e| e.first())
                .filter(|v| !v.is_empty())
                .cloned();
            let Some(own_id) = own_id else {
                continue;
            };
            let rff_segs = nav.find_segments_in_group("RFF", &["SG5", "SG8"], i);
            for rff in &rff_segs {
                if rff
                    .elements
                    .first()
                    .and_then(|e| e.first())
                    .is_some_and(|v| v == "Z23")
                {
                    if let Some(ref_val) = rff.elements.first().and_then(|e| e.get(1)) {
                        if ref_val == &own_id {
                            return ConditionResult::False;
                        }
                    }
                }
            }
        }
        ConditionResult::True
    }

    /// [11] Wenn in SG8 SEQ+Z37 SG9 CCI+++Z86 CAV+Z69/Z70 (Addition / Subtraktion) vorhanden, darf es in dem Vorgang beliebig viele weitere SG8 SEQ+Z37 mit identischem Rechenschrittidentifikator mit derselben ...
    // REVIEW: When multiple SG8 SEQ+Z37 share the same Rechenschrittidentifikator (duplicates), all operator CAV codes across those instances must be exclusively Z69 (Addition) or Z70 (Subtraktion). Navigates SG9 children of each SG8 to collect operator codes, groups by step ID, and checks the constraint for duplicates. Zeitraum-ID same-scope matching is not enforced due to API limitations — treats global step_id grouping as approximation. (medium confidence)
    fn evaluate_11(&self, ctx: &EvaluationContext) -> ConditionResult {
        let nav = match ctx.navigator() {
            Some(n) => n,
            None => return ConditionResult::Unknown,
        };
        let sg8_count = nav.group_instance_count(&["SG5", "SG8"]);
        if sg8_count == 0 {
            return ConditionResult::Unknown;
        }
        // Map step_id -> (instance_count, all_operator_codes_across_all_instances)
        let mut step_data: std::collections::HashMap<String, (usize, Vec<String>)> =
            std::collections::HashMap::new();
        for i in 0..sg8_count {
            let seq_segs = nav.find_segments_in_group("SEQ", &["SG5", "SG8"], i);
            let step_id = seq_segs
                .iter()
                .find(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|v| v == "Z37")
                })
                .and_then(|s| s.elements.get(1))
                .and_then(|e| e.first())
                .filter(|v| !v.is_empty())
                .cloned();
            let Some(step_id) = step_id else {
                continue;
            };
            let sg9_count = nav.child_group_instance_count(&["SG5", "SG8"], i, "SG9");
            let mut ops: Vec<String> = Vec::new();
            for j in 0..sg9_count {
                let cavs = nav.find_segments_in_child_group("CAV", &["SG5", "SG8"], i, "SG9", j);
                for cav in &cavs {
                    if let Some(code) = cav.elements.first().and_then(|e| e.first()) {
                        if matches!(code.as_str(), "Z69" | "Z70" | "Z80" | "Z81" | "Z82" | "Z83") {
                            ops.push(code.clone());
                        }
                    }
                }
            }
            let entry = step_data.entry(step_id).or_insert((0, Vec::new()));
            entry.0 += 1;
            entry.1.extend(ops);
        }
        // HAND-EDITED: [11] is the step sharing its Rechenschrittidentifikator
        // with further SEQ+Z37 — the case `X [11] ⊻ [15]` (Z69) sets against the
        // step standing alone ([15]), as [12] does for Z83. It holds where the
        // identifier occurs more than once and every operator of those steps
        // is Z69/Z70: the step of the enclosing SG8, or any step without one.
        let shared = |count: usize, operators: &[String]| {
            ConditionResult::from(
                count > 1 && operators.iter().all(|op| op == "Z69" || op == "Z70"),
            )
        };
        if let Some(sg8) = ctx.enclosing_scope("SG8") {
            let own = sg8.last().map(|(_, i)| *i).unwrap_or_default();
            let own_id = nav
                .find_segments_in_group("SEQ", &["SG5", "SG8"], own)
                .iter()
                .find(|s| s.get_element(0) == "Z37")
                .map(|s| s.get_component(1, 0).to_string())
                .filter(|v| !v.is_empty());
            return match own_id.and_then(|id| step_data.get(&id)) {
                Some((count, operators)) => shared(*count, operators),
                None => ConditionResult::Unknown,
            };
        }
        if step_data
            .values()
            .any(|(count, operators)| shared(*count, operators).is_true())
        {
            return ConditionResult::True;
        }
        ConditionResult::False
    }

    /// [12] Wenn in SG8 SEQ+Z37 SG9 CCI+++Z86 CAV+Z83 (Positivwert) vorhanden, darf es in dem Vorgang keine weitere SG8 SEQ+Z37 mit identischem Rechenschrittidentifikator und derselben Zeitraum-ID geben
    // REVIEW: When a calculation step SG8 SEQ+Z37 contains the Z83 (Positivwert) operator in its SG9 CAV, no other SG8 SEQ+Z37 may share the same Rechenschrittidentifikator within the Vorgang. Groups step IDs by count and checks that any step with Z83 appears exactly once. Zeitraum-ID scoping approximated by global step_id grouping. (medium confidence)
    fn evaluate_12(&self, ctx: &EvaluationContext) -> ConditionResult {
        let nav = match ctx.navigator() {
            Some(n) => n,
            None => return ConditionResult::Unknown,
        };
        let sg8_count = nav.group_instance_count(&["SG5", "SG8"]);
        if sg8_count == 0 {
            return ConditionResult::Unknown;
        }
        // Map step_id -> (instance_count, has_z83_operator)
        let mut step_data: std::collections::HashMap<String, (usize, bool)> =
            std::collections::HashMap::new();
        for i in 0..sg8_count {
            let seq_segs = nav.find_segments_in_group("SEQ", &["SG5", "SG8"], i);
            let step_id = seq_segs
                .iter()
                .find(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|v| v == "Z37")
                })
                .and_then(|s| s.elements.get(1))
                .and_then(|e| e.first())
                .filter(|v| !v.is_empty())
                .cloned();
            let Some(step_id) = step_id else {
                continue;
            };
            let sg9_count = nav.child_group_instance_count(&["SG5", "SG8"], i, "SG9");
            let mut has_z83 = false;
            for j in 0..sg9_count {
                let cavs = nav.find_segments_in_child_group("CAV", &["SG5", "SG8"], i, "SG9", j);
                if cavs.iter().any(|c| {
                    c.elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|v| v == "Z83")
                }) {
                    has_z83 = true;
                }
            }
            let entry = step_data.entry(step_id).or_insert((0, false));
            entry.0 += 1;
            entry.1 |= has_z83;
        }
        // Rule: if Z83 (Positivwert) operator is present for a step_id, that step_id must be unique
        for (_step_id, (count, has_z83)) in &step_data {
            if *has_z83 && *count > 1 {
                return ConditionResult::False;
            }
        }
        ConditionResult::True
    }

    /// [25] Wenn MP-ID in SG2 NAD+MR (Nachrichtenempfänger) in der Rolle LF
    /// EXTERNAL: Requires context from outside the message.
    fn evaluate_25(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.external.evaluate("recipient_is_lf")
    }

    /// [26] sofern per ORDERS reklamiert
    /// EXTERNAL: Requires context from outside the message.
    // REVIEW: Cannot be determined from EDIFACT message content alone — requires external knowledge of whether a prior ORDERS message was used to make a claim. Depends on business process context outside the current message. (medium confidence)
    fn evaluate_26(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.external.evaluate("claimed_via_orders")
    }

    /// [37] Wenn ein Gültigkeitsende bereits angegeben werden kann.
    /// EXTERNAL: Requires context from outside the message.
    // REVIEW: Whether a validity end date can already be specified is an organizational business decision at message creation time. Checking DTM+Z35 presence would be circular (condition guards whether to include that very field). Must be resolved from business context external to the message. (medium confidence)
    fn evaluate_37(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.external.evaluate("validity_end_known")
    }

    /// [42] Der in diesem Datenlement angegebene Code der Schaltzeitdefinition muss innerhalb eines Vorgangs (IDE) eindeutig sein.
    // REVIEW: Uniqueness of Schaltzeitdefinition codes within an IDE (SG5 group). The only Z44-keyed element in the provided SG8 schema is DTM+Z44 (Schaltzeitänderungszeitpunkt), so uniqueness is enforced on the DTM value within each SG5 instance. Medium confidence because the schema reference only shows DTM segments for SG8 — the actual 'Code' data element could reside in a CCI/SEQ segment not shown here. (medium confidence)
    fn evaluate_42(&self, ctx: &EvaluationContext) -> ConditionResult {
        let nav = match ctx.navigator() {
            Some(n) => n,
            None => return ConditionResult::Unknown,
        };
        let sg5_count = nav.group_instance_count(&["SG5"]);
        for i in 0..sg5_count {
            let sg8_count = nav.child_group_instance_count(&["SG5"], i, "SG8");
            let mut seen = std::collections::HashSet::new();
            for j in 0..sg8_count {
                let dtms = nav.find_segments_in_child_group("DTM", &["SG5"], i, "SG8", j);
                for dtm in &dtms {
                    if dtm
                        .elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|v| v == "Z44")
                    {
                        if let Some(val) = dtm.elements.first().and_then(|e| e.get(1)) {
                            if !val.is_empty() && !seen.insert(val.clone()) {
                                return ConditionResult::False;
                            }
                        }
                    }
                }
            }
        }
        ConditionResult::True
    }

    /// [43] Der in diesem Datenlement angegebene Code der Leistungskurvendefinition muss innerhalb eines Vorgangs (IDE) eindeutig sein.
    // REVIEW: Uniqueness of Leistungskurvendefinition codes within an IDE (SG5 group). Mirrors condition 42 but targets DTM+Z45 (Leistungskurvenänderungszeitpunkt). Same caveat: the actual 'Code' element might live in a CCI/SEQ segment absent from the provided schema reference — medium confidence. (medium confidence)
    fn evaluate_43(&self, ctx: &EvaluationContext) -> ConditionResult {
        let nav = match ctx.navigator() {
            Some(n) => n,
            None => return ConditionResult::Unknown,
        };
        let sg5_count = nav.group_instance_count(&["SG5"]);
        for i in 0..sg5_count {
            let sg8_count = nav.child_group_instance_count(&["SG5"], i, "SG8");
            let mut seen = std::collections::HashSet::new();
            for j in 0..sg8_count {
                let dtms = nav.find_segments_in_child_group("DTM", &["SG5"], i, "SG8", j);
                for dtm in &dtms {
                    if dtm
                        .elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|v| v == "Z45")
                    {
                        if let Some(val) = dtm.elements.first().and_then(|e| e.get(1)) {
                            if !val.is_empty() && !seen.insert(val.clone()) {
                                return ConditionResult::False;
                            }
                        }
                    }
                }
            }
        }
        ConditionResult::True
    }

    /// [56] Wenn dieses DTM+Z25 (Verwendung der Daten ab) im SG6 RFF (Verwendungszeitraum der Daten) mit der Zeitraum ID "1" im DE1156 ist, muss das Datum der darauffolgende oder ein älterer Tag 0:00 Uhr deut...
    // REVIEW: Checks that DTM+Z25 (Verwendung der Daten ab) in any SG6 whose associated RFF has Zeitraum-ID '1' in DE1156 (C506 component [0][2]) is at most the day following DTM+137 (message date) at 0:00. Date arithmetic is implemented inline without external crates. Timezone nuance ('0:00 Uhr deutscher Zeit' = CET/CEST midnight, not UTC midnight) is approximated — threshold uses CCYYMMDD+10000 of the next calendar day in UTC, which introduces up to 2-hour margin of error around DST transitions. The Zeitraum-ID '1' is checked at elements[0][2] per the explicit DE1156 reference in the condition text. (medium confidence)
    fn evaluate_56(&self, ctx: &EvaluationContext) -> ConditionResult {
        let msg_dtm_segs = ctx.find_segments_with_qualifier("DTM", 0, "137");
        let msg_date_val = match msg_dtm_segs
            .first()
            .and_then(|s| s.elements.first())
            .and_then(|e| e.get(1))
        {
            Some(v) => v.clone(),
            None => return ConditionResult::Unknown,
        };
        if msg_date_val.len() < 8 {
            return ConditionResult::Unknown;
        }
        let year: u32 = match msg_date_val[..4].parse::<u32>() {
            Ok(v) => v,
            Err(_) => return ConditionResult::Unknown,
        };
        let month: u32 = match msg_date_val[4..6].parse::<u32>() {
            Ok(v) => v,
            Err(_) => return ConditionResult::Unknown,
        };
        let day: u32 = match msg_date_val[6..8].parse::<u32>() {
            Ok(v) => v,
            Err(_) => return ConditionResult::Unknown,
        };
        let days_in_month: u32 = match month {
            1 | 3 | 5 | 7 | 8 | 10 | 12 => 31,
            4 | 6 | 9 | 11 => 30,
            2 => {
                if year % 400 == 0 || (year % 4 == 0 && year % 100 != 0) {
                    29
                } else {
                    28
                }
            }
            _ => return ConditionResult::Unknown,
        };
        let (ny, nm, nd): (u32, u32, u32) = if day >= days_in_month {
            if month == 12 {
                (year + 1, 1, 1)
            } else {
                (year, month + 1, 1)
            }
        } else {
            (year, month, day + 1)
        };
        let threshold = format!("{:04}{:02}{:02}0000", ny, nm, nd);
        let nav = match ctx.navigator() {
            Some(n) => n,
            None => return ConditionResult::Unknown,
        };
        let sg5_count = nav.group_instance_count(&["SG5"]);
        for i in 0..sg5_count {
            let sg6_count = nav.child_group_instance_count(&["SG5"], i, "SG6");
            for j in 0..sg6_count {
                let rffs = nav.find_segments_in_child_group("RFF", &["SG5"], i, "SG6", j);
                let has_zeitraum_1 = rffs.iter().any(|rff| {
                    rff.elements
                        .first()
                        .and_then(|e| e.get(2))
                        .is_some_and(|v| v == "1")
                });
                if has_zeitraum_1 {
                    let dtms = nav.find_segments_in_child_group("DTM", &["SG5"], i, "SG6", j);
                    for dtm in &dtms {
                        if dtm
                            .elements
                            .first()
                            .and_then(|e| e.first())
                            .is_some_and(|v| v == "Z25")
                        {
                            if let Some(dtm_val) = dtm.elements.first().and_then(|e| e.get(1)) {
                                if dtm_val.as_str() > threshold.as_str() {
                                    return ConditionResult::False;
                                }
                            }
                        }
                    }
                }
            }
        }
        ConditionResult::True
    }

    /// [57] Wenn dieses DTM+Z25 (Verwendung der Daten ab) nicht im SG6 RFF+Z49/ Z53 (Verwendungszeitraum der Daten: Gültige Daten/ Keine Daten) mit der Zeitraum ID "1" im DE1156 ist, muss das Datum dem DTM+Z2...
    // REVIEW: Complex cross-SG6 ordering condition: for each SG6 with Zeitraum-ID != 1, its DTM+Z25 must equal the DTM+Z26 of the SG6 with the next lower Zeitraum-ID. Implemented via navigator collecting (id, z25, z26) tuples per SG6 instance, then verifying the sequential boundary constraint. (medium confidence)
    fn evaluate_57(&self, ctx: &EvaluationContext) -> ConditionResult {
        let nav = match ctx.navigator() {
            Some(n) => n,
            None => return ConditionResult::Unknown,
        };
        let sg6_path: &[&str] = &["SG5", "SG6"];
        let sg6_count = nav.group_instance_count(sg6_path);
        if sg6_count == 0 {
            return ConditionResult::Unknown;
        }
        // Build (zeitraum_id, dtm_z25, dtm_z26) per SG6
        let mut entries: Vec<(u32, Option<String>, Option<String>)> = Vec::new();
        for i in 0..sg6_count {
            let rff_segs = nav.find_segments_in_group("RFF", sg6_path, i);
            let mut zeitraum_id: Option<u32> = None;
            for rff in &rff_segs {
                let qual = rff
                    .elements
                    .first()
                    .and_then(|e| e.first())
                    .map(|s| s.as_str());
                if matches!(qual, Some("Z49") | Some("Z53")) {
                    if let Some(id_str) = rff.elements.first().and_then(|e| e.get(2)) {
                        if let Ok(id) = id_str.parse::<u32>() {
                            zeitraum_id = Some(id);
                        }
                    }
                }
            }
            let id = match zeitraum_id {
                Some(id) => id,
                None => continue,
            };
            let dtm_segs = nav.find_segments_in_group("DTM", sg6_path, i);
            let mut dtm_z25: Option<String> = None;
            let mut dtm_z26: Option<String> = None;
            for dtm in &dtm_segs {
                let qual = dtm
                    .elements
                    .first()
                    .and_then(|e| e.first())
                    .map(|s| s.as_str());
                let val = dtm
                    .elements
                    .first()
                    .and_then(|e| e.get(1))
                    .filter(|v| !v.is_empty())
                    .cloned();
                match qual {
                    Some("Z25") => dtm_z25 = val,
                    Some("Z26") => dtm_z26 = val,
                    _ => {}
                }
            }
            entries.push((id, dtm_z25, dtm_z26));
        }
        // For non-ID-1 entries, check DTM+Z25 == DTM+Z26 of next-lower Zeitraum-ID
        for (id, dtm_z25, _) in &entries {
            if *id == 1 {
                continue;
            }
            let current_z25 = match dtm_z25 {
                Some(v) => v,
                None => continue,
            };
            let next_lower = entries
                .iter()
                .filter(|(other_id, _, _)| *other_id < *id)
                .map(|(other_id, _, _)| *other_id)
                .max();
            let lower_id = match next_lower {
                Some(lid) => lid,
                None => return ConditionResult::Unknown,
            };
            match entries.iter().find(|(eid, _, _)| *eid == lower_id) {
                Some((_, _, Some(lower_z26))) => {
                    if current_z25 != lower_z26 {
                        return ConditionResult::False;
                    }
                }
                Some((_, _, None)) => return ConditionResult::Unknown,
                None => return ConditionResult::Unknown,
            }
        }
        ConditionResult::True
    }

    /// [490] wenn Wert in diesem DE, an der Stelle CCYYMMDD ein Datum aus dem angegeben Zeitraum der Tabelle Kapitel 3.5 „Prozesszeitpunkt bei MESZ mit UTC“ ist
    fn evaluate_490(&self, ctx: &EvaluationContext) -> ConditionResult {
        let dtm_segs = ctx.find_segments_with_qualifier("DTM", 0, "137");
        match dtm_segs
            .first()
            .and_then(|s| s.elements.first())
            .and_then(|e| e.get(1))
        {
            Some(val) => is_mesz_utc(val),
            None => ConditionResult::False, // segment absent → condition not applicable
        }
    }

    /// [491] wenn Wert in diesem DE, an der Stelle CCYYMMDD ein Datum aus dem angegeben Zeitraum der Tabelle Kapitel 3.6 „Prozesszeitpunkt bei MEZ mit UTC“ ist
    fn evaluate_491(&self, ctx: &EvaluationContext) -> ConditionResult {
        let dtm_segs = ctx.find_segments_with_qualifier("DTM", 0, "137");
        match dtm_segs
            .first()
            .and_then(|s| s.elements.first())
            .and_then(|e| e.get(1))
        {
            Some(val) => is_mez_utc(val),
            None => ConditionResult::False, // segment absent → condition not applicable
        }
    }

    /// [1] Nur MP-ID aus Sparte Strom
    /// EXTERNAL: Requires context from outside the message.
    // REVIEW: Whether the MP-ID belongs to the electricity sector (Sparte Strom) cannot be determined from the EDIFACT message alone — requires external market participant registry lookup. (medium confidence)
    fn evaluate_1(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.external.evaluate("mp_id_is_strom_sector")
    }

    /// [2] Wenn SG5 STS+Z23+Z34 (Berechnungsformel muss beim Absender angefragt werden) in einem SG5 IDE vorhanden
    fn evaluate_2(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.any_group_has_qualified_value("STS", 0, "Z23", 1, 0, &["Z34"], &["SG5"])
    }

    /// [5] Wenn das SG8 RFF+Z19 (Referenz auf eine Messlokation) in derselben SG8 SEQ+Z37 nicht vorhanden
    fn evaluate_5(&self, ctx: &EvaluationContext) -> ConditionResult {
        // HAND-EDITED: "RFF+Z19 in derselben SG8 SEQ+Z37 nicht vorhanden" — the enclosing SG8 only, when the scope
        // reaches one; the message as before otherwise.
        if let Some(scope) = ctx.enclosing_scope("SG8") {
            return ConditionResult::from(
                ctx.find_segments_at(scope, "SEQ")
                    .iter()
                    .any(|s| s.get_element(0) == "Z37")
                    && !ctx
                        .find_segments_at(scope, "RFF")
                        .iter()
                        .any(|s| s.get_element(0) == "Z19"),
            );
        }
        ctx.any_group_has_qualifier_without("RFF", 0, "Z19", "SEQ", 0, "Z37", &["SG4", "SG8"])
    }

    /// [6] Wenn das SG8 RFF+Z23 (Referenz auf Rechenschritt) in derselben SG8 SEQ+Z37 nicht vorhanden
    fn evaluate_6(&self, ctx: &EvaluationContext) -> ConditionResult {
        // HAND-EDITED: "RFF+Z23 in derselben SG8 SEQ+Z37 nicht vorhanden" — the enclosing SG8 only, when the scope
        // reaches one; the message as before otherwise.
        if let Some(scope) = ctx.enclosing_scope("SG8") {
            return ConditionResult::from(
                ctx.find_segments_at(scope, "SEQ")
                    .iter()
                    .any(|s| s.get_element(0) == "Z37")
                    && !ctx
                        .find_segments_at(scope, "RFF")
                        .iter()
                        .any(|s| s.get_element(0) == "Z23"),
            );
        }
        ctx.any_group_has_qualifier_without("RFF", 0, "Z23", "SEQ", 0, "Z37", &["SG4", "SG8"])
    }

    /// [7] Wenn in derselben SG8 SEQ+Z37 das SG8 RFF+Z19 (Referenz auf eine Messlokation) vorhanden
    fn evaluate_7(&self, ctx: &EvaluationContext) -> ConditionResult {
        // HAND-EDITED: "in derselben SG8 SEQ+Z37 das SG8 RFF+Z19 vorhanden" — the enclosing SG8 only, when the scope
        // reaches one; the message as before otherwise.
        if let Some(scope) = ctx.enclosing_scope("SG8") {
            return ConditionResult::from(
                ctx.find_segments_at(scope, "SEQ")
                    .iter()
                    .any(|s| s.get_element(0) == "Z37")
                    && ctx
                        .find_segments_at(scope, "RFF")
                        .iter()
                        .any(|s| s.get_element(0) == "Z19"),
            );
        }
        ctx.any_group_has_co_occurrence("SEQ", 0, &["Z37"], "RFF", 0, 0, &["Z19"], &["SG4", "SG8"])
    }

    /// [10] wenn vorhanden
    fn evaluate_10(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // "wenn vorhanden" — conditional modifier meaning the associated rule applies
        // only when the element is present. As a standalone boolean predicate this
        // always evaluates to True: the condition itself imposes no additional
        // constraint beyond the field's own optionality.
        ConditionResult::True
    }

    /// [13] Wenn in SG8 SEQ+Z37 SG9 CCI+++Z86 CAV+Z80/Z81 (Divisor / Dividend) vorhanden, muss in diesem Vorgang genau eine zweite SG8 SEQ+Z37 mit identischen Rechenschrittidentifikator und derselben Zeitraum-...
    // REVIEW: Complex cross-SG8 pairing invariant: for each Z80 (Divisor) or Z81 (Dividend) operator in SG9 CCI+Z86, there must be exactly one matching SG8 with the same Rechenschrittidentifikator (SEQ.elements[1][0]) and Zeitraum-ID (RFF+Z46) that carries the complementary operator. Requires full navigator traversal. (medium confidence)
    fn evaluate_13(&self, ctx: &EvaluationContext) -> ConditionResult {
        {
            let nav = match ctx.navigator() {
                Some(n) => n,
                None => return ConditionResult::Unknown,
            };

            let sg8_count = nav.group_instance_count(&["SG5", "SG8"]);
            // Collect (rs_id, zt_id, operator) for all Z37 SG8s that have CCI+++Z86 and CAV+Z80/Z81
            let mut div_instances: Vec<(String, String, String)> = Vec::new();

            for i in 0..sg8_count {
                let seqs = nav.find_segments_in_group("SEQ", &["SG5", "SG8"], i);
                let seq_z37 = seqs.iter().find(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|v| v == "Z37")
                });
                let seq_z37 = match seq_z37 {
                    Some(s) => s,
                    None => continue,
                };

                let rs_id = seq_z37
                    .elements
                    .get(1)
                    .and_then(|e| e.first())
                    .cloned()
                    .unwrap_or_default();

                let rffs = nav.find_segments_in_group("RFF", &["SG5", "SG8"], i);
                let zt_id = rffs
                    .iter()
                    .find(|s| {
                        s.elements
                            .first()
                            .and_then(|e| e.first())
                            .is_some_and(|v| v == "Z46")
                    })
                    .and_then(|s| s.elements.first())
                    .and_then(|e| e.get(1))
                    .cloned()
                    .unwrap_or_default();

                let sg9_count = nav.child_group_instance_count(&["SG5", "SG8"], i, "SG9");
                for j in 0..sg9_count {
                    let ccis =
                        nav.find_segments_in_child_group("CCI", &["SG5", "SG8"], i, "SG9", j);
                    let has_z86 = ccis.iter().any(|s| {
                        s.elements
                            .get(2)
                            .and_then(|e| e.first())
                            .is_some_and(|v| v == "Z86")
                    });
                    if !has_z86 {
                        continue;
                    }
                    let cavs =
                        nav.find_segments_in_child_group("CAV", &["SG5", "SG8"], i, "SG9", j);
                    for cav in &cavs {
                        let op = cav
                            .elements
                            .first()
                            .and_then(|e| e.first())
                            .map(|s| s.as_str());
                        if matches!(op, Some("Z80") | Some("Z81")) {
                            div_instances.push((
                                rs_id.clone(),
                                zt_id.clone(),
                                op.unwrap().to_string(),
                            ));
                        }
                    }
                }
            }

            if div_instances.is_empty() {
                return ConditionResult::Unknown;
            }

            // Each Z80 must have exactly one Z81 counterpart with same IDs, and vice versa
            for (rs_id, zt_id, op) in &div_instances {
                let counterpart = if op == "Z80" { "Z81" } else { "Z80" };
                let count = div_instances
                    .iter()
                    .filter(|(rs, zt, o)| rs == rs_id && zt == zt_id && o == counterpart)
                    .count();
                if count != 1 {
                    return ConditionResult::False;
                }
            }

            ConditionResult::True
        }
    }

    /// [14] Wenn in SG8 SEQ+Z37 SG9 CCI+++Z86 CAV+Z82 (Faktor) vorhanden, darf es in dem Vorgang beliebig viele weitere SG8 SEQ+Z37 mit identischem Rechenschrittidentifikator und derselben Zeitraum-ID geben, d...
    // REVIEW: When a Z82 (Faktor/Multiplikation) operator is present in a group of SG8s sharing the same Rechenschrittidentifikator and Zeitraum-ID, ALL members of that group must exclusively carry Z82 — no mixing with Z80/Z81. Returns True when this homogeneity constraint holds. (medium confidence)
    fn evaluate_14(&self, ctx: &EvaluationContext) -> ConditionResult {
        {
            let nav = match ctx.navigator() {
                Some(n) => n,
                None => return ConditionResult::Unknown,
            };

            let sg8_count = nav.group_instance_count(&["SG5", "SG8"]);
            // Collect (rs_id, zt_id, operators) for all Z37 SG8s with CCI+++Z86
            let mut instances: Vec<(String, String, Vec<String>)> = Vec::new();

            for i in 0..sg8_count {
                let seqs = nav.find_segments_in_group("SEQ", &["SG5", "SG8"], i);
                let seq_z37 = seqs.iter().find(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|v| v == "Z37")
                });
                let seq_z37 = match seq_z37 {
                    Some(s) => s,
                    None => continue,
                };

                let rs_id = seq_z37
                    .elements
                    .get(1)
                    .and_then(|e| e.first())
                    .cloned()
                    .unwrap_or_default();

                let rffs = nav.find_segments_in_group("RFF", &["SG5", "SG8"], i);
                let zt_id = rffs
                    .iter()
                    .find(|s| {
                        s.elements
                            .first()
                            .and_then(|e| e.first())
                            .is_some_and(|v| v == "Z46")
                    })
                    .and_then(|s| s.elements.first())
                    .and_then(|e| e.get(1))
                    .cloned()
                    .unwrap_or_default();

                let sg9_count = nav.child_group_instance_count(&["SG5", "SG8"], i, "SG9");
                let mut ops: Vec<String> = Vec::new();
                for j in 0..sg9_count {
                    let ccis =
                        nav.find_segments_in_child_group("CCI", &["SG5", "SG8"], i, "SG9", j);
                    if !ccis.iter().any(|s| {
                        s.elements
                            .get(2)
                            .and_then(|e| e.first())
                            .is_some_and(|v| v == "Z86")
                    }) {
                        continue;
                    }
                    let cavs =
                        nav.find_segments_in_child_group("CAV", &["SG5", "SG8"], i, "SG9", j);
                    for cav in &cavs {
                        if let Some(op) = cav.elements.first().and_then(|e| e.first()) {
                            ops.push(op.clone());
                        }
                    }
                }
                if !ops.is_empty() {
                    instances.push((rs_id, zt_id, ops));
                }
            }

            // Find any (rs_id, zt_id) key that has a Z82 operator
            let z82_keys: Vec<(&str, &str)> = instances
                .iter()
                .filter(|(_, _, ops)| ops.iter().any(|op| op == "Z82"))
                .map(|(rs, zt, _)| (rs.as_str(), zt.as_str()))
                .collect();

            if z82_keys.is_empty() {
                return ConditionResult::Unknown;
            }

            // For each group keyed by (rs_id, zt_id) that has Z82, all operators must be exclusively Z82
            for (rs_id, zt_id) in &z82_keys {
                for (rs, zt, ops) in &instances {
                    if rs.as_str() == *rs_id && zt.as_str() == *zt_id {
                        if ops.iter().any(|op| op != "Z82") {
                            return ConditionResult::False;
                        }
                    }
                }
            }

            ConditionResult::True
        }
    }

    /// [15] Wenn in einem SG5 IDE+24 nur eine SEQ+Z37 mit einer SG8 RFF+Z19 (Messlokation) und der selben Zeitraum-ID vorhanden ist
    // REVIEW: Checks that within the current SG5 (IDE+24) transaction group there is exactly one SG8 that contains both SEQ+Z37 (Bestandteil des Rechenschritts) and RFF+Z19 (Messlokation reference), and that all such matching SG8s reference the same Zeitraum-ID via RFF+Z46. (medium confidence)
    fn evaluate_15(&self, ctx: &EvaluationContext) -> ConditionResult {
        {
            let nav = match ctx.navigator() {
                Some(n) => n,
                None => return ConditionResult::Unknown,
            };

            let sg8_count = nav.group_instance_count(&["SG5", "SG8"]);
            let mut matching_count = 0usize;
            let mut first_zt_id: Option<String> = None;

            for i in 0..sg8_count {
                let seqs = nav.find_segments_in_group("SEQ", &["SG5", "SG8"], i);
                let has_z37 = seqs.iter().any(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|v| v == "Z37")
                });
                if !has_z37 {
                    continue;
                }

                let rffs = nav.find_segments_in_group("RFF", &["SG5", "SG8"], i);
                let has_z19 = rffs.iter().any(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|v| v == "Z19")
                });
                if !has_z19 {
                    continue;
                }

                // Verify Zeitraum-ID consistency across all matching instances
                let zt_id = rffs
                    .iter()
                    .find(|s| {
                        s.elements
                            .first()
                            .and_then(|e| e.first())
                            .is_some_and(|v| v == "Z46")
                    })
                    .and_then(|s| s.elements.first())
                    .and_then(|e| e.get(1))
                    .cloned();

                if let Some(ref zt) = zt_id {
                    match &first_zt_id {
                        None => first_zt_id = Some(zt.clone()),
                        Some(first) => {
                            if first != zt {
                                return ConditionResult::False;
                            }
                        }
                    }
                }

                matching_count += 1;
            }

            ConditionResult::from(matching_count == 1)
        }
    }

    /// [21] Wenn in dieser CAV+ZD3 der Wert im DE7110 mit Z32 (sonstiger Zählzeitdefinitionstyp) vorhanden ist
    fn evaluate_21(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.has_qualified_value("CAV", 0, "ZD3", 0, 3, &["Z32"])
    }

    /// [22] Wenn MP-ID in SG2 NAD+MS (Nachrichtenabsender) in der Rolle NB
    /// EXTERNAL: Requires context from outside the message.
    // REVIEW: Whether the MP-ID in NAD+MS (Nachrichtenabsender) holds the role of NB (Netzbetreiber) cannot be determined from the EDIFACT message alone — requires external market participant role registry. (medium confidence)
    fn evaluate_22(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.external.evaluate("sender_is_nb")
    }

    /// [24] Wenn SG5 STS+Z36+Z45 (Definitionen werden verwendet) vorhanden
    fn evaluate_24(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.has_qualified_value("STS", 0, "Z36", 1, 0, &["Z45"])
    }

    /// [27] Wenn in SG9 CAV+ZD4+Z26 (keine Verwendung des Hochlastzeitfensters) vorhanden
    fn evaluate_27(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.has_qualified_value("CAV", 0, "ZD4", 0, 3, &["Z26"])
    }

    /// [29] Wenn in SG8 SEQ+Z43 DTM+Z33 (Zählzeitänderungszeitpunkt) im DE2379 der Code 303 vorhanden
    // REVIEW: In the same SG8, SEQ+Z43 (Zählzeitdefinition) must be present and DTM must have format code 303 at elements[0][2]. In a SEQ+Z43 SG8, the only DTM present is DTM+Z33, so checking format code 303 without qualifying by Z33 is safe. (medium confidence)
    fn evaluate_29(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.any_group_has_co_occurrence("SEQ", 0, &["Z43"], "DTM", 0, 2, &["303"], &["SG5", "SG8"])
    }

    /// [30] Der Wert von CCYY in diesem DE muss genau um eins höher sein, als der Wert CCYY des SG5 DTM+Z34 (Gültigkeitsbeginn) DE2380
    // REVIEW: Compares CCYY of DTM+Z35 (Gültigkeitsende) to CCYY of DTM+Z34 (Gültigkeitsbeginn), checking that the end year is exactly start year + 1. 'Diesem DE' most plausibly refers to DTM+Z35 since it is the natural counterpart to DTM+Z34 and its year is constrained relative to Z34. (medium confidence)
    fn evaluate_30(&self, ctx: &EvaluationContext) -> ConditionResult {
        // CCYY in this DE must be exactly one higher than CCYY of SG5 DTM+Z34 DE2380
        // This applies to DTM+Z35 (Gültigkeitsende) whose year must be Z34 year + 1
        let z34_segs = ctx.find_segments_with_qualifier("DTM", 0, "Z34");
        let z35_segs = ctx.find_segments_with_qualifier("DTM", 0, "Z35");
        let z34_year = z34_segs
            .first()
            .and_then(|s| s.elements.first())
            .and_then(|e| e.get(1))
            .and_then(|v| v.get(..4))
            .and_then(|y| y.parse::<u32>().ok());
        let this_year = z35_segs
            .first()
            .and_then(|s| s.elements.first())
            .and_then(|e| e.get(1))
            .and_then(|v| v.get(..4))
            .and_then(|y| y.parse::<u32>().ok());
        match (z34_year, this_year) {
            (Some(start), Some(end)) => ConditionResult::from(end == start + 1),
            _ => ConditionResult::Unknown,
        }
    }

    /// [31] Wenn im DE2379 dieses Segments der Code 303 vorhanden
    // REVIEW: Checks if any DTM segment has format code 303 at elements[0][2] (DE2379). Applies to DTM+Z33/Z44/Z45 which can carry format codes 303 or 401. Message-wide check is sufficient since these are the only DTMs with variable format codes. (medium confidence)
    fn evaluate_31(&self, ctx: &EvaluationContext) -> ConditionResult {
        ConditionResult::from(ctx.find_segments("DTM").iter().any(|s| {
            s.elements
                .first()
                .and_then(|e| e.get(2))
                .map(|v| v == "303")
                .unwrap_or(false)
        }))
    }

    /// [32] Der Zeitpunkt in diesem DE muss ≥ dem Zeitpunkt aus dem DE2380 des Gültigkeitsbeginn der ausgerollten Definition (SG5 DTM+Z34) sein
    // REVIEW: Validates that SG8 change timestamps (Z33/Z44/Z45) are >= the SG5 DTM+Z34 validity start. 'Diesem DE' refers to the change-point timestamp being validated in SG8. First 12 characters (YYYYMMDDHHmm) are used for consistent lexicographic date comparison in format 303. (medium confidence)
    fn evaluate_32(&self, ctx: &EvaluationContext) -> ConditionResult {
        // Timestamp in this DE >= DTM+Z34 (Gültigkeitsbeginn der ausgerollten Definition)
        // Applies to SG8 change-point timestamps (Z33 Zählzeit, Z44 Schaltzeit, Z45 Leistungskurve)
        let z34_segs = ctx.find_segments_with_qualifier("DTM", 0, "Z34");
        let z34_value = match z34_segs
            .first()
            .and_then(|s| s.elements.first())
            .and_then(|e| e.get(1))
        {
            Some(v) => v.clone(),
            None => return ConditionResult::Unknown,
        };
        let threshold = z34_value.get(..12).unwrap_or(z34_value.as_str());
        for qual in &["Z33", "Z44", "Z45"] {
            let segs = ctx.find_segments_with_qualifier("DTM", 0, qual);
            for seg in &segs {
                if let Some(val) = seg.elements.first().and_then(|e| e.get(1)) {
                    let v = val.get(..12).unwrap_or(val);
                    if v < threshold {
                        return ConditionResult::False;
                    }
                }
            }
        }
        ConditionResult::True
    }

    /// [33] Der Zeitpunkt in diesem DE muss ≤ dem Zeitpunkt aus dem DE2380 des Gültigkeitsende der ausgerollten Definition (SG5 DTM+Z35) sein
    // REVIEW: Validates that SG8 change timestamps (Z33/Z44/Z45) are <= the SG5 DTM+Z35 validity end. Symmetric counterpart to condition 32. First 12 characters used for format-303 string comparison. (medium confidence)
    fn evaluate_33(&self, ctx: &EvaluationContext) -> ConditionResult {
        // Timestamp in this DE <= DTM+Z35 (Gültigkeitsende der ausgerollten Definition)
        // Applies to SG8 change-point timestamps (Z33 Zählzeit, Z44 Schaltzeit, Z45 Leistungskurve)
        let z35_segs = ctx.find_segments_with_qualifier("DTM", 0, "Z35");
        let z35_value = match z35_segs
            .first()
            .and_then(|s| s.elements.first())
            .and_then(|e| e.get(1))
        {
            Some(v) => v.clone(),
            None => return ConditionResult::Unknown,
        };
        let threshold = z35_value.get(..12).unwrap_or(z35_value.as_str());
        for qual in &["Z33", "Z44", "Z45"] {
            let segs = ctx.find_segments_with_qualifier("DTM", 0, qual);
            for seg in &segs {
                if let Some(val) = seg.elements.first().and_then(|e| e.get(1)) {
                    let v = val.get(..12).unwrap_or(val);
                    if v > threshold {
                        return ConditionResult::False;
                    }
                }
            }
        }
        ConditionResult::True
    }

    /// [34] Wenn im DE2379 dieses Segments der Code 401 vorhanden
    // REVIEW: Checks if any DTM segment has format code 401 at elements[0][2] (DE2379). Counterpart to condition [31] for the 401 format code (point-in-time without timezone vs. UTC offset). (medium confidence)
    fn evaluate_34(&self, ctx: &EvaluationContext) -> ConditionResult {
        ConditionResult::from(ctx.find_segments("DTM").iter().any(|s| {
            s.elements
                .first()
                .and_then(|e| e.get(2))
                .map(|v| v == "401")
                .unwrap_or(false)
        }))
    }

    /// [36] Wenn in SG8 SEQ+Z43 DTM+Z33 (Zählzeitänderungszeitpunkt) im DE2379 der Code 401 vorhanden
    // REVIEW: In the same SG8, SEQ+Z43 (Zählzeitdefinition) must be present and DTM+Z33 must have format code 401 at elements[0][2]. Counterpart to condition [29] for the 401 format code. (medium confidence)
    fn evaluate_36(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.any_group_has_co_occurrence("SEQ", 0, &["Z43"], "DTM", 0, 2, &["401"], &["SG5", "SG8"])
    }

    /// [41] Wenn SG8 SEQ+Z42 (Zählzeitdefinition) vorhanden
    fn evaluate_41(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.any_group_has_qualifier("SEQ", 0, "Z42", &["SG5", "SG8"])
    }

    /// [44] Der in diesem Datenlement angegebene Code der Zählzeitdefinition muss innerhalb eines Vorgangs (IDE) eindeutig sein.
    // REVIEW: RFF+Z27 (elements[0][1]) in SG8 holds the Zählzeitdefinition code per the segment reference. Collects all Z27 reference values message-wide and checks for duplicates. Returns True when all codes are distinct (unique), False when a duplicate exists, Unknown when no Z27 segments found. Group navigator would be needed to properly scope to SG5 boundaries — approximated as message-wide. (medium confidence)
    fn evaluate_44(&self, ctx: &EvaluationContext) -> ConditionResult {
        // RFF+Z27 in SG8 holds the Zählzeitdefinition code — must be unique within the IDE (SG5) scope.
        // Approximate with message-wide check: all Z27 values must be distinct.
        let rff_segs = ctx.find_segments("RFF");
        let z27_values: Vec<&str> = rff_segs
            .iter()
            .filter(|s| {
                s.elements
                    .first()
                    .and_then(|e| e.first())
                    .is_some_and(|q| q == "Z27")
            })
            .filter_map(|s| {
                s.elements
                    .first()
                    .and_then(|e| e.get(1))
                    .map(|s| s.as_str())
            })
            .collect();
        if z27_values.is_empty() {
            return ConditionResult::Unknown;
        }
        let unique_count: std::collections::HashSet<&str> = z27_values.iter().copied().collect();
        ConditionResult::from(unique_count.len() == z27_values.len())
    }

    /// [46] Wenn in SG8 SEQ+Z73 DTM+Z44 (Schaltzeitänderungszeitpunkt) im DE2379 der Code 303 vorhanden
    fn evaluate_46(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.any_group_has_co_occurrence("SEQ", 0, &["Z73"], "DTM", 0, 2, &["303"], &["SG5", "SG8"])
    }

    /// [47] Wenn in SG8 SEQ+Z73 DTM+Z44 (Schaltzeitänderungszeitpunkt) im DE2379 der Code 401 vorhanden
    fn evaluate_47(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.any_group_has_co_occurrence("SEQ", 0, &["Z73"], "DTM", 0, 2, &["401"], &["SG5", "SG8"])
    }

    /// [48] Wenn in SG8 SEQ+Z74 DTM+Z45 (Leistungskurvenänderungszeitpunkt) im DE2379 der Code 303 vorhanden
    fn evaluate_48(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.any_group_has_co_occurrence("SEQ", 0, &["Z74"], "DTM", 0, 2, &["303"], &["SG5", "SG8"])
    }

    /// [49] Wenn in SG8 SEQ+Z74 DTM+Z45 (Leistungskurvenänderungszeitpunkt) im DE2379 der Code 401 vorhanden
    fn evaluate_49(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.any_group_has_co_occurrence("SEQ", 0, &["Z74"], "DTM", 0, 2, &["401"], &["SG5", "SG8"])
    }

    /// [50] In jedem DE2379 dieses DTM-Segments innerhalb eines IDE+24 (Vorgangs) muss der gleiche Code angegeben werden
    // REVIEW: Checks that all DTM segments in the message use the same DE2379 format code. Full per-IDE+24 scoping would require a navigator, but message-wide consistency is a practical approximation — in well-formed UTILTS messages a single IDE is common. Returns Unknown when no DTMs are found. (medium confidence)
    fn evaluate_50(&self, ctx: &EvaluationContext) -> ConditionResult {
        {
            let dtms = ctx.find_segments("DTM");
            let format_codes: Vec<&str> = dtms
                .iter()
                .filter_map(|s| s.elements.first()?.get(2).map(|s| s.as_str()))
                .filter(|s| !s.is_empty())
                .collect();
            if format_codes.is_empty() {
                return ConditionResult::Unknown;
            }
            let first = format_codes[0];
            ConditionResult::from(format_codes.iter().all(|&c| c == first))
        }
    }

    /// [53] Wenn im DE3155 in demselben COM der Code EM vorhanden ist
    fn evaluate_53(&self, ctx: &EvaluationContext) -> ConditionResult {
        {
            let coms = ctx.find_segments("COM");
            ConditionResult::from(coms.iter().any(|s| {
                s.elements
                    .first()
                    .and_then(|e| e.get(1))
                    .is_some_and(|v| v == "EM")
            }))
        }
    }

    /// [54] Wenn im DE3155 in demselben COM der Code TE / FX / AJ / AL vorhanden ist
    fn evaluate_54(&self, ctx: &EvaluationContext) -> ConditionResult {
        {
            let coms = ctx.find_segments("COM");
            ConditionResult::from(coms.iter().any(|s| {
                s.elements
                    .first()
                    .and_then(|e| e.get(1))
                    .is_some_and(|v| matches!(v.as_str(), "TE" | "FX" | "AJ" | "AL"))
            }))
        }
    }

    /// [55] Es ist der Wert einzutragen, der sich aus der Wiederholungshäufigkeit des SG6 RFF+Z49/ Z53 (Verwendungszeitraum der Daten: Gültige Daten/ Keine Daten) ergibt. Bedeutet: Das erste SG6 RFF+Z49/ Z53...
    fn evaluate_55(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: The value to enter is derived from the repetition index of SG6 RFF+Z49/Z53:
        // first occurrence = "1", second = "2", third = "3", etc.
        // This is an informational annotation describing how to populate the data element.
        ConditionResult::True
    }

    /// [58] Wenn im selben SG6 RFF+Z49/ Z53 (Verwendungszeitraum der Daten: Gültige Daten/ Keine Daten) im DE1156 (Zeitraum-ID) eine Zeitraum ID genannt ist, die kleiner ist als in einem anderen SG6 RFF+Z49/ ...
    // REVIEW: True when at least two SG6 RFF+Z49/Z53 instances exist with different DE1156 Zeitraum-IDs (i.e. min < max across all parsed integer IDs). This satisfies the 'smaller than another' ordering condition. Returns False for single-instance or equal-ID cases. (medium confidence)
    fn evaluate_58(&self, ctx: &EvaluationContext) -> ConditionResult {
        {
            let rffs = ctx.find_segments("RFF");
            let ids: Vec<i64> = rffs
                .iter()
                .filter(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|q| q == "Z49" || q == "Z53")
                })
                .filter_map(|s| s.elements.first()?.get(2)?.parse::<i64>().ok())
                .collect();
            if ids.len() < 2 {
                return ConditionResult::False;
            }
            let min = *ids.iter().min().unwrap();
            let max = *ids.iter().max().unwrap();
            ConditionResult::from(min < max)
        }
    }

    /// [59] Es ist die Zeitraum-ID vom DE1156 aus einem passenden SG6 RFF+Z49 (Verwendungszeitraum der Daten) einzutragen
    // REVIEW: Cross-group Zeitraum-ID correlation: SG8 RFF+Z46 DE1154 (reference to Zeitraum-ID) must match a DE1156 value from SG6 RFF+Z49 (Verwendungszeitraum der Daten). Collects DE1156 values from all RFF+Z49 instances and checks whether any RFF+Z46 reference value matches. Returns Unknown when either set is empty. (medium confidence)
    fn evaluate_59(&self, ctx: &EvaluationContext) -> ConditionResult {
        {
            let rffs = ctx.find_segments("RFF");
            let sg6_ids: Vec<String> = rffs
                .iter()
                .filter(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|q| q == "Z49")
                })
                .filter_map(|s| s.elements.first()?.get(2).cloned())
                .filter(|v| !v.is_empty())
                .collect();
            if sg6_ids.is_empty() {
                return ConditionResult::Unknown;
            }
            let sg8_refs: Vec<String> = rffs
                .iter()
                .filter(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.first())
                        .is_some_and(|q| q == "Z46")
                })
                .filter_map(|s| s.elements.first()?.get(1).cloned())
                .filter(|v| !v.is_empty())
                .collect();
            if sg8_refs.is_empty() {
                return ConditionResult::Unknown;
            }
            ConditionResult::from(sg8_refs.iter().any(|r| sg6_ids.contains(r)))
        }
    }

    /// [61] Wenn in einem STS+E01 im DE9013 (Status der Antwort) ein Antwortcode aus dem Cluster Ablehnung vorhanden ist
    // HAND-EDITED: driven by per-EBD cluster data (mako_prozesse).
    // The condition is existential — any Ablehnung STS+E01 → True.
    fn evaluate_61(&self, ctx: &EvaluationContext) -> ConditionResult {
        any_sts_e01_in_cluster(ctx, Cluster::is_ablehnung)
    }

    /// [62] Wenn MP-ID in SG2 NAD+MR (Nachrichtenempfänger) in der Rolle MSB
    /// EXTERNAL: Requires context from outside the message.
    fn evaluate_62(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.external.evaluate("recipient_is_msb")
    }

    /// [494] Das hier genannte Datum muss der Zeitpunkt sein, zu dem das Dokument erstellt wurde, oder ein Zeitpunkt, der davor liegt.
    fn evaluate_494(&self, ctx: &EvaluationContext) -> ConditionResult {
        // HAND-EDITED: subject is the current DTM's DE2380 (via ctx.resolved_value),
        // compared with the message date (DTM+137). Lexicographic compare is valid
        // for fixed-width CCYYMMDDHHMM+ZZ (format 303).
        let current = match ctx.resolved_value {
            Some(v) if !v.is_empty() => v,
            _ => return ConditionResult::Unknown,
        };
        let threshold = match ctx
            .find_segments_with_qualifier("DTM", 0, "137")
            .first()
            .and_then(|s| s.elements.first())
            .and_then(|e| e.get(1))
        {
            Some(v) if !v.is_empty() => v.clone(),
            _ => return ConditionResult::Unknown,
        };
        ConditionResult::from(current <= threshold.as_str())
    }

    /// [501] Hinweis: Verwendung der ID der Marktlokation
    fn evaluate_501(&self, _ctx: &EvaluationContext) -> ConditionResult {
        ConditionResult::True
    }

    /// [502] Hinweis: Verwendung der ID der Messlokation
    fn evaluate_502(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Verwendung der ID der Messlokation — informational note, always applies
        ConditionResult::True
    }

    /// [504] Hinweis: Wert aus BGM+Z55 DE1004 der ORDERS mit der die Reklamation einer Definition erfolgt ist
    fn evaluate_504(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Wert aus BGM+Z55 DE1004 der ORDERS mit der die Reklamation einer Definition erfolgt ist — informational note, always applies
        ConditionResult::True
    }

    /// [505] Hinweis: Jede ausgerollte Zählzeitdefinition ist in einem eigenen IDE anzugeben
    fn evaluate_505(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Jede ausgerollte Zählzeitdefinition ist in einem eigenen IDE anzugeben — informational note, always applies
        ConditionResult::True
    }

    /// [506] Hinweis: Zeitpunkt, ab dem die Übersicht der Zählzeitdefinitionen gültig ist
    fn evaluate_506(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Zeitpunkt, ab dem die Übersicht der Zählzeitdefinitionen gültig ist — informational note, always applies
        ConditionResult::True
    }

    /// [507] Hinweis: Es ist die Zeit nach der deutschen gesetzlichen Zeit anzugeben
    fn evaluate_507(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Es ist die Zeit nach der deutschen gesetzlichen Zeit anzugeben — informational note, always applies
        ConditionResult::True
    }

    /// [508] Hinweis: Zeitpunkt, ab dem die Übersicht der Schaltzeitdefinitionen gültig ist
    fn evaluate_508(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Zeitpunkt, ab dem die Übersicht der Schaltzeitdefinitionen gültig ist — informational note, always applies
        ConditionResult::True
    }

    /// [509] Hinweis: Zeitpunkt, ab dem die Übersicht der Leistungskurvendefinition gültig ist
    fn evaluate_509(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Zeitpunkt, ab dem die Übersicht der Leistungskurvendefinition gültig ist — informational note, always applies
        ConditionResult::True
    }

    /// [510] Hinweis: Für jeden Zählzeitänderungszeitpunkt (SG8 DTM+Z33) ist diese Sementgruppe einmal anzugeben
    fn evaluate_510(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Für jeden Zählzeitänderungszeitpunkt (SG8 DTM+Z33) ist diese Segmentgruppe einmal anzugeben — informational note, always applies
        ConditionResult::True
    }

    /// [511] Hinweis: Der Zählzeitänderungszeitpunkt (SG8DTM+Z33) dieser SG8 darf in keiner anderen SG8 „Zählzeitdefinition“ wiederholt werden
    // REVIEW: Checks that no DTM+Z33 DE2380 value is repeated across SG8 instances. Collects all Z33 qualifier DTM segments and verifies uniqueness. Medium confidence because SG8-scoped iteration falls back to message-wide, which is correct here since each DTM+Z33 belongs to a distinct SG8. (medium confidence)
    fn evaluate_511(&self, ctx: &EvaluationContext) -> ConditionResult {
        // HAND-EDITED: "DTM+Z33 dieser SG8 darf in keiner anderen SG8 „Zählzeitdefinition“ wiederholt werden" — compared with the other instances when the
        // scope reaches an SG8; the message as before otherwise.
        if let Some(scope) = ctx.enclosing_scope("SG8") {
            let z33 = |path: &[(&str, usize)]| -> Vec<String> {
                ctx.find_segments_at(path, "DTM")
                    .iter()
                    .filter(|s| s.get_element(0) == "Z33")
                    .map(|s| s.get_component(0, 1).to_string())
                    .filter(|v| !v.is_empty())
                    .collect()
            };
            let own = z33(scope);
            if own.is_empty() {
                return ConditionResult::Unknown;
            }
            let others = ctx.scopes_under("SG5", "SG8").unwrap_or_default();
            return ConditionResult::from(!others.iter().any(|p| {
                p.as_slice() != scope
                    && ctx
                        .find_segments_at(p, "SEQ")
                        .iter()
                        .any(|s| s.get_element(0) == "Z42")
                    && z33(p).iter().any(|v| own.contains(v))
            }));
        }
        // Uniqueness check: no DTM+Z33 value in DE2380 may appear in more than one SG8
        let dtm_z33_segments = ctx.find_segments_with_qualifier("DTM", 0, "Z33");
        let values: Vec<&str> = dtm_z33_segments
            .iter()
            .filter_map(|s| s.elements.first()?.get(1).map(|v| v.as_str()))
            .filter(|v| !v.is_empty())
            .collect();
        if values.is_empty() {
            return ConditionResult::Unknown;
        }
        // Check for duplicates: if all values are unique, condition is satisfied (True)
        let mut seen = std::collections::HashSet::new();
        let all_unique = values.iter().all(|v| seen.insert(*v));
        ConditionResult::from(all_unique)
    }

    /// [512] Hinweis: Wenn der Code 303 im DE2379 des Zählzeitänderungszeitpunkt (SG8 DTM+Z33) genutzt wird, muss genau ein Wert im DE2380 des Zählzeitänderungszeitpunkt (SG8 DTM+Z33) identisch mit dem Wert...
    // REVIEW: When DTM+Z33 uses format code 303 in elements[0][2], exactly one DE2380 value (elements[0][1]) across all Z33 instances must equal the DE2380 value of DTM+Z34 from SG5. Medium confidence due to cross-SG group scoping — the message-wide fallback gives correct semantics here since we're correlating across SG5 and SG8 boundaries. (medium confidence)
    fn evaluate_512(&self, ctx: &EvaluationContext) -> ConditionResult {
        // When format code 303 is used in DTM+Z33 DE2379,
        // exactly one DE2380 value of DTM+Z33 must match the DE2380 of SG5 DTM+Z34
        let dtm_z33_segments = ctx.find_segments_with_qualifier("DTM", 0, "Z33");
        // Only consider Z33 segments that use format code 303
        let z33_303_values: Vec<&str> = dtm_z33_segments
            .iter()
            .filter(|s| {
                s.elements
                    .first()
                    .and_then(|e| e.get(2))
                    .is_some_and(|v| v == "303")
            })
            .filter_map(|s| s.elements.first()?.get(1).map(|v| v.as_str()))
            .filter(|v| !v.is_empty())
            .collect();
        if z33_303_values.is_empty() {
            // No Z33 with format 303 present — condition not applicable
            return ConditionResult::Unknown;
        }
        // Collect DE2380 values from SG5 DTM+Z34
        let dtm_z34_segments = ctx.find_segments_with_qualifier("DTM", 0, "Z34");
        let z34_values: Vec<&str> = dtm_z34_segments
            .iter()
            .filter_map(|s| s.elements.first()?.get(1).map(|v| v.as_str()))
            .filter(|v| !v.is_empty())
            .collect();
        if z34_values.is_empty() {
            return ConditionResult::Unknown;
        }
        // Exactly one Z33 DE2380 value must match a Z34 DE2380 value
        let match_count = z33_303_values
            .iter()
            .filter(|v| z34_values.contains(v))
            .count();
        ConditionResult::from(match_count == 1)
    }

    /// [513] Hinweis: Wenn der Code 401 im DE2379 des Zählzeitänderungszeitpunkt (SG8 DTM+Z33) genutzt wird, muss genau ein Wert = 0000 im DE2380 des Zählzeitänderungszeitpunkt (SG8 DTM+Z33) sein
    fn evaluate_513(&self, ctx: &EvaluationContext) -> ConditionResult {
        // When format code 401 is used in DTM+Z33 DE2379,
        // exactly one DE2380 value must equal "0000"
        let dtm_z33_segments = ctx.find_segments_with_qualifier("DTM", 0, "Z33");
        // Only consider Z33 segments that use format code 401
        let z33_401_values: Vec<&str> = dtm_z33_segments
            .iter()
            .filter(|s| {
                s.elements
                    .first()
                    .and_then(|e| e.get(2))
                    .is_some_and(|v| v == "401")
            })
            .filter_map(|s| s.elements.first()?.get(1).map(|v| v.as_str()))
            .filter(|v| !v.is_empty())
            .collect();
        if z33_401_values.is_empty() {
            // No Z33 with format 401 present — condition not applicable
            return ConditionResult::Unknown;
        }
        // Exactly one value must equal "0000"
        let zero_count = z33_401_values.iter().filter(|v| **v == "0000").count();
        ConditionResult::from(zero_count == 1)
    }

    /// [514] Hinweis: Für jeden Schaltzeitänderungszeitpunkt (SG8 DTM+Z44) ist diese Sementgruppe einmal anzugeben
    fn evaluate_514(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Für jeden Schaltzeitänderungszeitpunkt (SG8 DTM+Z44) ist diese Segmentgruppe einmal anzugeben — informational note, always applies
        ConditionResult::True
    }

    /// [515] Hinweis: Kein Schaltzeitänderungszeitpunkt (SG8 DTM+Z44) darf mehrfach vorkommen
    fn evaluate_515(&self, ctx: &EvaluationContext) -> ConditionResult {
        let dtm_z44 = ctx.find_segments_with_qualifier("DTM", 0, "Z44");
        let mut values = std::collections::HashSet::new();
        for seg in &dtm_z44 {
            let c507 = match seg.elements.first() {
                Some(e) => e,
                None => continue,
            };
            let value = c507.get(1).map(|s| s.as_str()).unwrap_or("");
            if !value.is_empty() {
                if !values.insert(value.to_string()) {
                    return ConditionResult::False;
                }
            }
        }
        if dtm_z44.is_empty() {
            ConditionResult::Unknown
        } else {
            ConditionResult::True
        }
    }

    /// [516] Hinweis: Wenn der Code 303 im DE2379 des Schaltzeitänderungszeitpunkt (SG8 DTM+Z44) genutzt wird, muss genau ein Wert im DE2380 des Schaltzeitänderungszeitpunkt (SG8 DTM+Z44) identisch mit dem We...
    // REVIEW: When format code 303 is used in DTM+Z44 DE2379, at least one DTM+Z44 DE2380 value must match a SG5 DTM+Z34 DE2380 value. Cross-group check; medium confidence due to SG5 context dependency. (medium confidence)
    fn evaluate_516(&self, ctx: &EvaluationContext) -> ConditionResult {
        let dtm_z44 = ctx.find_segments_with_qualifier("DTM", 0, "Z44");
        let dtm_z34 = ctx.find_segments_with_qualifier("DTM", 0, "Z34");
        let mut has_303 = false;
        let mut z34_values: std::collections::HashSet<String> = std::collections::HashSet::new();
        for seg in &dtm_z34 {
            let c507 = match seg.elements.first() {
                Some(e) => e,
                None => continue,
            };
            let value = c507.get(1).map(|s| s.clone()).unwrap_or_default();
            if !value.is_empty() {
                z34_values.insert(value);
            }
        }
        for seg in &dtm_z44 {
            let c507 = match seg.elements.first() {
                Some(e) => e,
                None => continue,
            };
            let format_code = c507.get(2).map(|s| s.as_str()).unwrap_or("");
            if format_code == "303" {
                has_303 = true;
                let value = c507.get(1).map(|s| s.as_str()).unwrap_or("");
                if z34_values.contains(value) {
                    return ConditionResult::True;
                }
            }
        }
        if has_303 {
            ConditionResult::False
        } else {
            ConditionResult::Unknown
        }
    }

    /// [517] Hinweis: Wenn der Code 401 im DE2379 des Schaltzeitänderungszeitpunkt (SG8 DTM+Z44) genutzt wird, muss genau ein Wert = 0000 im DE2380 des Schaltzeitänderungszeitpunkt (SG8 DTM+Z44) sein
    fn evaluate_517(&self, ctx: &EvaluationContext) -> ConditionResult {
        let dtm_z44 = ctx.find_segments_with_qualifier("DTM", 0, "Z44");
        let mut has_401 = false;
        for seg in &dtm_z44 {
            let c507 = match seg.elements.first() {
                Some(e) => e,
                None => continue,
            };
            let format_code = c507.get(2).map(|s| s.as_str()).unwrap_or("");
            if format_code == "401" {
                has_401 = true;
                let value = c507.get(1).map(|s| s.as_str()).unwrap_or("");
                if value == "0000" {
                    return ConditionResult::True;
                }
            }
        }
        if has_401 {
            ConditionResult::False
        } else {
            ConditionResult::Unknown
        }
    }

    /// [518] Hinweis: Für jeden Leistungskurvenänderungszeitpunkt (SG8 DTM+Z45) ist diese Sementgruppe einmal anzugeben
    fn evaluate_518(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Für jeden Leistungskurvenänderungszeitpunkt (SG8 DTM+Z45) ist diese Segmentgruppe einmal anzugeben — informational note, always applies
        ConditionResult::True
    }

    /// [519] Hinweis: Kein Leistungskurvenänderungszeitpunkt (SG8 DTM+Z45) darf mehrfach vorkommen
    fn evaluate_519(&self, ctx: &EvaluationContext) -> ConditionResult {
        let dtm_z45 = ctx.find_segments_with_qualifier("DTM", 0, "Z45");
        let mut values = std::collections::HashSet::new();
        for seg in &dtm_z45 {
            let c507 = match seg.elements.first() {
                Some(e) => e,
                None => continue,
            };
            let value = c507.get(1).map(|s| s.as_str()).unwrap_or("");
            if !value.is_empty() {
                if !values.insert(value.to_string()) {
                    return ConditionResult::False;
                }
            }
        }
        if dtm_z45.is_empty() {
            ConditionResult::Unknown
        } else {
            ConditionResult::True
        }
    }

    /// [520] Hinweis: Wenn der Code 303 im DE2379 des Leistungskurvenänderungszeitpunkt (SG8 DTM+Z45) genutzt wird, muss genau ein Wert im DE2380 des Leistungskurvenänderungszeitpunkt (SG8 DTM+Z45) identisch ...
    // REVIEW: When format code 303 is used in DTM+Z45 DE2379, at least one DTM+Z45 DE2380 value must match a SG5 DTM+Z34 DE2380 value. Same pattern as 516 but for Z45. (medium confidence)
    fn evaluate_520(&self, ctx: &EvaluationContext) -> ConditionResult {
        let dtm_z45 = ctx.find_segments_with_qualifier("DTM", 0, "Z45");
        let dtm_z34 = ctx.find_segments_with_qualifier("DTM", 0, "Z34");
        let mut has_303 = false;
        let mut z34_values: std::collections::HashSet<String> = std::collections::HashSet::new();
        for seg in &dtm_z34 {
            let c507 = match seg.elements.first() {
                Some(e) => e,
                None => continue,
            };
            let value = c507.get(1).map(|s| s.clone()).unwrap_or_default();
            if !value.is_empty() {
                z34_values.insert(value);
            }
        }
        for seg in &dtm_z45 {
            let c507 = match seg.elements.first() {
                Some(e) => e,
                None => continue,
            };
            let format_code = c507.get(2).map(|s| s.as_str()).unwrap_or("");
            if format_code == "303" {
                has_303 = true;
                let value = c507.get(1).map(|s| s.as_str()).unwrap_or("");
                if z34_values.contains(value) {
                    return ConditionResult::True;
                }
            }
        }
        if has_303 {
            ConditionResult::False
        } else {
            ConditionResult::Unknown
        }
    }

    /// [521] Hinweis: Wenn der Code 401 im DE2379 des Leistungskurvenänderungszeitpunkt (SG8 DTM+Z45)
    // REVIEW: Incomplete condition text but follows the same pattern as 517 (DTM+Z44/401/'0000') but for DTM+Z45. Medium confidence due to incomplete specification. (medium confidence)
    fn evaluate_521(&self, ctx: &EvaluationContext) -> ConditionResult {
        let dtm_z45 = ctx.find_segments_with_qualifier("DTM", 0, "Z45");
        let mut has_401 = false;
        for seg in &dtm_z45 {
            let c507 = match seg.elements.first() {
                Some(e) => e,
                None => continue,
            };
            let format_code = c507.get(2).map(|s| s.as_str()).unwrap_or("");
            if format_code == "401" {
                has_401 = true;
                let value = c507.get(1).map(|s| s.as_str()).unwrap_or("");
                if value == "0000" {
                    return ConditionResult::True;
                }
            }
        }
        if has_401 {
            ConditionResult::False
        } else {
            ConditionResult::Unknown
        }
    }

    /// [522] Hinweis: Jede ausgerollte Schaltzeitdefinition ist in einem eigenen IDE anzugeben
    fn evaluate_522(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Jede ausgerollte Schaltzeitdefinition ist in einem eigenen IDE anzugeben — informational note, always applies
        ConditionResult::True
    }

    /// [523] Hinweis: Jede ausgerollte Leistungskurvendefinition ist in einem eigenen IDE anzugeben
    fn evaluate_523(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Jede ausgerollte Leistungskurvendefinition ist in einem eigenen IDE anzugeben — informational note, always applies
        ConditionResult::True
    }

    /// [524] Hinweis: Es ist der Code einer Zählzeitdefinition anzugeben
    fn evaluate_524(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Es ist der Code einer Zählzeitdefinition anzugeben — informational note, always applies
        ConditionResult::True
    }

    /// [525] Hinweis: Es ist der Code einer Schaltzeitdefinition anzugeben
    fn evaluate_525(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Es ist der Code einer Schaltzeitdefinition anzugeben — informational note, always applies
        ConditionResult::True
    }

    /// [526] Hinweis: Es ist der Code einer Leistungskurvendefinition anzugeben
    fn evaluate_526(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Es ist der Code einer Leistungskurvendefinition anzugeben — informational note, always applies
        ConditionResult::True
    }

    /// [527] Hinweis: Dieser Code ist anzugeben, wenn es sich um eine einmalig zu übermittelnde Definition handelt
    fn evaluate_527(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Dieser Code ist anzugeben, wenn es sich um eine einmalig zu übermittelnde Definition handelt — informational note, always applies
        ConditionResult::True
    }

    /// [528] Hinweis: Dieser Code ist anzugeben, wenn es sich um eine jährlich zu übermittelnde Definition handelt
    fn evaluate_528(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Dieser Code ist anzugeben, wenn es sich um eine jährlich zu übermittelnde Definition handelt — informational note, always applies
        ConditionResult::True
    }

    /// [529] Hinweis: Verwendung der ID der Netzlokation
    fn evaluate_529(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Verwendung der ID der Netzlokation — informational note, always applies
        ConditionResult::True
    }

    /// [530] Hinweis: Es darf nur eine Information im DE3148 übermittelt werden
    fn evaluate_530(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Es darf nur eine Information im DE3148 übermittelt werden — informational note, always applies
        ConditionResult::True
    }

    /// [531] Hinweis: Für weitere Details siehe Kapitel 4.1 "Übermittlung einer Vielzahl von Berechnungsformeln in einem Vorgang"
    fn evaluate_531(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Für weitere Details siehe Kapitel 4.1 "Übermittlung einer Vielzahl von Berechnungsformeln in einem Vorgang" — informational note, always applies
        ConditionResult::True
    }

    /// [532] Hinweis: Es ist die Zeitraum-ID vom DE1156 aus einem passenden SG6 RFF+Z49/Z53 (Verwendungszeitraum der Daten: "Gültige Daten", "Keine Daten") aus der Übermittlung der Berechnungsformel aus SG6 R...
    // REVIEW: Cross-group Zeitraum-ID matching: collect DE1156 values from SG6 RFF+Z49/Z53 segments, then verify that SG8 RFF+Z46 references (DE1154) point to one of those IDs. Medium confidence because the condition is a hint about correct data linkage across groups, and the exact scoping (per-SG5/SG6 instance vs message-wide) may require navigator-based logic for full correctness. (medium confidence)
    fn evaluate_532(&self, ctx: &EvaluationContext) -> ConditionResult {
        {
            // Collect Zeitraum-IDs (DE1156 = elements[0][2]) from SG6 RFF+Z49 and RFF+Z53
            let rff_segments = ctx.find_segments("RFF");
            let zeitraum_ids: Vec<String> = rff_segments
                .iter()
                .filter(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.first())
                        .map(|q| q == "Z49" || q == "Z53")
                        .unwrap_or(false)
                })
                .filter_map(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.get(2))
                        .filter(|v| !v.is_empty())
                        .cloned()
                })
                .collect();

            if zeitraum_ids.is_empty() {
                return ConditionResult::Unknown;
            }

            // Check SG8 RFF+Z46 references (DE1154 = elements[0][1]) against collected Zeitraum-IDs
            let rff_z46_segments = ctx.find_segments_with_qualifier("RFF", 0, "Z46");
            if rff_z46_segments.is_empty() {
                return ConditionResult::Unknown;
            }

            let any_match = rff_z46_segments.iter().any(|s| {
                s.elements
                    .first()
                    .and_then(|e| e.get(1))
                    .map(|ref_id| zeitraum_ids.iter().any(|zid| zid == ref_id))
                    .unwrap_or(false)
            });

            ConditionResult::from(any_match)
        }
    }

    /// [533] Hinweis: Für jeden übermittelten Zeitraum aus der Übermittlung der Berechnungsformel ist genau einmal das Segement anzugeben
    fn evaluate_533(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Für jeden übermittelten Zeitraum aus der Übermittlung der Berechnungsformel ist genau einmal das Segment anzugeben — informational note, always applies
        ConditionResult::True
    }

    /// [534] Hinweis: Wert aus SG5 IDE+24 DE7402 mit der die Übermitt-lung der Berechnungsformel erfolgt ist.
    fn evaluate_534(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Wert aus SG5 IDE+24 DE7402 — value comes from the Vorgangsnummer of the Berechnungsformel transmission; informational note, always applies
        ConditionResult::True
    }

    /// [912] Format: Wert kann mit maximal 6 Nachkommastellen angegeben werden
    // REVIEW: Format condition: max 6 decimal places. Applies to a numeric quantity value; QTY is the standard numeric segment in UTILTS. The AHB row context is not in the structure reference but QTY.elements[0][1] is the standard value position. (medium confidence)
    fn evaluate_912(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("QTY", 0, 1, |val| validate_max_decimal_places(val, 6))
    }

    /// [913] Format: Mögliche Werte: 1 bis 99999
    // REVIEW: Format condition: value must be in range [1, 99999]. Both bounds checked with validate_numeric and combined with AND logic. Applied to QTY value element as the most common numeric data element in UTILTS. (medium confidence)
    fn evaluate_913(&self, ctx: &EvaluationContext) -> ConditionResult {
        // HAND-EDITED: the value being validated (SEQ C286 1050, RFF 1154 …),
        // not the message's first QTY.
        ctx.format_check("QTY", 0, 1, |val| {
            match (
                validate_numeric(val, ">=", 1.0),
                validate_numeric(val, "<=", 99999.0),
            ) {
                (ConditionResult::True, ConditionResult::True) => ConditionResult::True,
                (ConditionResult::False, _) | (_, ConditionResult::False) => ConditionResult::False,
                _ => ConditionResult::Unknown,
            }
        })
    }

    /// [914] Format: Möglicher Wert: &gt; 0
    // REVIEW: Format condition: value must be strictly greater than 0. Applied to QTY value element; validate_numeric with '>' operator handles this directly. (medium confidence)
    fn evaluate_914(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("QTY", 0, 1, |val| validate_numeric(val, ">", 0.0))
    }

    /// [915] Format: Möglicher Wert: ≠ 1
    // REVIEW: Format condition: value must not equal 1. Applied to the QTY quantity value (element[0][1]) as this is the standard numeric data element in UTILTS. Medium confidence because the exact segment/element this applies to is inferred from context rather than stated explicitly. (medium confidence)
    fn evaluate_915(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("QTY", 0, 1, |val| validate_numeric(val, "!=", 1.0))
    }

    /// [930] Format: max. 2 Nachkommastellen
    fn evaluate_930(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("QTY", 0, 1, |val| validate_max_decimal_places(val, 2))
    }

    /// [931] Format: ZZZ = +00
    fn evaluate_931(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("DTM", 0, 1, validate_timezone_utc)
    }

    /// [932] Format: HHMM = 2200
    fn evaluate_932(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("DTM", 0, 1, |val| validate_hhmm_equals(val, "2200"))
    }

    /// [933] Format: HHMM = 2300
    fn evaluate_933(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("DTM", 0, 1, |val| validate_hhmm_equals(val, "2300"))
    }

    /// [937] Format: keine Nachkommastelle
    fn evaluate_937(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("QTY", 0, 1, |val| validate_max_decimal_places(val, 0))
    }

    /// [939] Format: Die Zeichenkette muss die Zeichen @ und . enthalten
    fn evaluate_939(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("COM", 0, 0, validate_email)
    }

    /// [940] Format: Die Zeichenkette muss mit dem Zeichen + beginnen und danach dürfen nur noch Ziffern folgen
    fn evaluate_940(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("COM", 0, 0, validate_phone)
    }

    /// [947] Format: MMDDHHMM = 12312300
    fn evaluate_947(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("DTM", 0, 1, |val| validate_mmddhhmm_equals(val, "12312300"))
    }

    /// [950] Format: Marktlokations-ID
    fn evaluate_950(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check_qualified("LOC", 0, "Z16", 1, 0, validate_malo_id)
    }

    /// [951] Format: Zählpunktbezeichnung
    // REVIEW: Zählpunktbezeichnung (metering point designation) is a 33-character alphanumeric ID. The validate_zahlpunkt helper checks this format. The segment is typically LOC with a metering point qualifier (Z17 for Messlokation or Z19 for SteuerbareRessource in UTILTS). Using both as fallback. (medium confidence)
    fn evaluate_951(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check_qualified("LOC", 0, "Z19", 1, 0, validate_zahlpunkt)
    }

    /// [960] Format: Netzlokations-ID
    // HAND-EDITED: a Netzlokations-ID is "E" + ten alphanumerics (`E1688117482`),
    // not MaLo-shaped; `validate_malo_id` rejected every real one (#173).
    fn evaluate_960(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check_qualified("LOC", 0, "Z18", 1, 0, validate_nelo_id)
    }

    /// [963] Format: Möglicher Wert: ≤ 100
    // REVIEW: Format condition: value must be <= 100. Applied to QTY segment value (element 0, component 1). Uses validate_numeric helper. (medium confidence)
    fn evaluate_963(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("QTY", 0, 1, |val| validate_numeric(val, "<=", 100.0))
    }

    /// [964] Format: HHMM ≥ 0000
    // REVIEW: Format condition: HHMM >= 0000. Combined with condition 965 (HHMM <= 2359), together they validate a valid time range. Using validate_hhmm_range covering both bounds. Applied to DTM segment time value. (medium confidence)
    fn evaluate_964(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("DTM", 0, 1, |val| validate_hhmm_range(val, "0000", "2359"))
    }

    /// [965] Format: HHMM ≤ 2359
    // REVIEW: Format condition: HHMM <= 2359. Paired with condition 964 (HHMM >= 0000). Together they validate a valid HHMM time. Using validate_hhmm_range for both bounds on the DTM segment. (medium confidence)
    fn evaluate_965(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("DTM", 0, 1, |val| validate_hhmm_range(val, "0000", "2359"))
    }

    /// [969] Format: Möglicher Wer: ≤ 1
    // REVIEW: 900-series format condition: 'Möglicher Wert: ≤ 1' means the value must be <= 1. Applied to QTY quantity value (most common numeric value in UTILTS). validate_numeric with "<=" operator handles this. Medium confidence because the exact target segment is inferred from context. (medium confidence)
    fn evaluate_969(&self, ctx: &EvaluationContext) -> ConditionResult {
        ctx.format_check("QTY", 0, 1, |val| validate_numeric(val, "<=", 1.0))
    }

    /// [2001] Segment bzw. Segmentgruppe ist genau einmal anzugeben
    fn evaluate_2001(&self, _ctx: &EvaluationContext) -> ConditionResult {
        // Hinweis: Segment bzw. Segmentgruppe ist genau einmal anzugeben — informational cardinality note, always applies
        ConditionResult::True
    }

    /// [2002] Für jeden Code der Zählzeit aus SG8 SEQ+Z42 (Zählzeitdefinition) SG9 CCI+Z39 (Code der Zählzeitdefinition) sind mindestens zwei Register anzugeben, bei denen in dieser SG8 das SG8 RFF+Z27 mit d...
    // REVIEW: For each CCI+Z39 code (Zählzeitdefinition code, elements[2][0]) found in SG9 groups, at least 2 SG8 instances must have RFF+Z27 (elements[0][0]=Z27, elements[0][1]=code value) matching that code. Uses message-wide scan since navigator API does not expose a simple find-in-group method for non-child groups. (medium confidence)
    fn evaluate_2002(&self, ctx: &EvaluationContext) -> ConditionResult {
        // HAND-EDITED: "mindestens zwei Register, bei denen … RFF+Z27 mit diesem Code gefüllt ist" — compared with the other instances when the
        // scope reaches an SG8; the message as before otherwise.
        if let Some(scope) = ctx.enclosing_scope("SG8") {
            let codes = |path: &[(&str, usize)]| -> Vec<String> {
                ctx.find_segments_at(path, "RFF")
                    .iter()
                    .filter(|s| s.get_element(0) == "Z27")
                    .map(|s| s.get_component(0, 1).to_string())
                    .filter(|v| !v.is_empty())
                    .collect()
            };
            let own = codes(scope);
            if own.is_empty() {
                return ConditionResult::Unknown;
            }
            let sg8s = ctx.scopes_under("SG5", "SG8").unwrap_or_default();
            return ConditionResult::from(
                own.iter()
                    .all(|code| sg8s.iter().filter(|p| codes(p).contains(code)).count() >= 2),
            );
        }
        // Collect CCI+Z39 codes from SG9 (Code der Zählzeitdefinition) message-wide
        let cci_segments = ctx.find_segments("CCI");
        let codes: Vec<String> = cci_segments
            .iter()
            .filter(|s| {
                s.elements
                    .first()
                    .and_then(|e| e.first())
                    .is_some_and(|v| v == "Z39")
            })
            .filter_map(|s| s.elements.get(2).and_then(|e| e.first()).cloned())
            .filter(|c| !c.is_empty())
            .collect();
        if codes.is_empty() {
            return ConditionResult::Unknown;
        }
        // For each code, at least 2 SG8 instances must have RFF+Z27 referencing that code
        let rff_z27 = ctx.find_segments_with_qualifier("RFF", 0, "Z27");
        for code in &codes {
            let count = rff_z27
                .iter()
                .filter(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.get(1))
                        .is_some_and(|v| v == code)
                })
                .count();
            if count < 2 {
                return ConditionResult::False;
            }
        }
        ConditionResult::True
    }

    /// [2004] Segment ist genau einmal für jede Zeitraum-ID aus dem DE1156 der SG6 RFF+Z49 (Verwendungszeitraum der Daten: "Gültige Daten") anzugeben
    // REVIEW: For each Zeitraum-ID from SG6 RFF+Z49 DE1156 (elements[0][2]), exactly one SG5 STS must reference it. STS+E01 (Status der Antwort) stores Zeitraum-ID at elements[2][3] (DE9012). STS+Z23 (Status der Berechnungsformel) stores it at elements[2][0] (DE9013). Checks count == 1 for each Zeitraum-ID. (medium confidence)
    fn evaluate_2004(&self, ctx: &EvaluationContext) -> ConditionResult {
        // Collect Zeitraum-IDs from SG6 RFF+Z49 DE1156 (elements[0][2])
        let rff_z49 = ctx.find_segments_with_qualifier("RFF", 0, "Z49");
        if rff_z49.is_empty() {
            return ConditionResult::Unknown;
        }
        let zeitraum_ids: Vec<String> = rff_z49
            .iter()
            .filter_map(|s| s.elements.first().and_then(|e| e.get(2)).cloned())
            .filter(|id| !id.is_empty())
            .collect();
        if zeitraum_ids.is_empty() {
            return ConditionResult::Unknown;
        }
        let sts_segments = ctx.find_segments("STS");
        for zid in &zeitraum_ids {
            // STS+E01: Zeitraum-ID at elements[2][3] (DE9012)
            // STS+Z23: Zeitraum-ID at elements[2][0] (DE9013)
            let count = sts_segments
                .iter()
                .filter(|s| {
                    let qual = s
                        .elements
                        .first()
                        .and_then(|e| e.first())
                        .map(|v| v.as_str())
                        .unwrap_or("");
                    match qual {
                        "E01" => s
                            .elements
                            .get(2)
                            .and_then(|e| e.get(3))
                            .is_some_and(|v| v == zid),
                        "Z23" => s
                            .elements
                            .get(2)
                            .and_then(|e| e.first())
                            .is_some_and(|v| v == zid),
                        _ => false,
                    }
                })
                .count();
            if count != 1 {
                return ConditionResult::False;
            }
        }
        ConditionResult::True
    }

    /// [2005] Segment ist genau einmal für jede Zeitraum-ID aus dem DE9012 der SG5 STS+E01 ("Status der Antwort") anzugeben, wenn im selben SG5 STS+E01 im DE9013 der Code A99 ("Sontiges") enthalten ist
    // REVIEW: Finds STS+E01 segments where DE9013 (Code des Prüfschritts, elements[2][0]) = 'A99' (Sonstiges), then collects Zeitraum-IDs from DE9012 (elements[2][3]). For each such ID, checks that exactly one SG8 RFF+Z46 (elements[0][1]) references it, confirming the annotated segment appears exactly once per qualifying Zeitraum-ID. (medium confidence)
    fn evaluate_2005(&self, ctx: &EvaluationContext) -> ConditionResult {
        // Collect Zeitraum-IDs from STS+E01 where DE9013 (elements[2][0]) = A99 (Sonstiges)
        let sts_e01 = ctx.find_segments_with_qualifier("STS", 0, "E01");
        let zeitraum_ids: Vec<String> = sts_e01
            .iter()
            .filter(|s| {
                s.elements
                    .get(2)
                    .and_then(|e| e.first())
                    .is_some_and(|v| v == "A99")
            })
            .filter_map(|s| s.elements.get(2).and_then(|e| e.get(3)).cloned())
            .filter(|id| !id.is_empty())
            .collect();
        if zeitraum_ids.is_empty() {
            return ConditionResult::Unknown;
        }
        // For each Zeitraum-ID, exactly one SG8 RFF+Z46 (Referenz auf Zeitraum-ID) must reference it
        let rff_z46 = ctx.find_segments_with_qualifier("RFF", 0, "Z46");
        for zid in &zeitraum_ids {
            let count = rff_z46
                .iter()
                .filter(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.get(1))
                        .is_some_and(|v| v == zid)
                })
                .count();
            if count != 1 {
                return ConditionResult::False;
            }
        }
        ConditionResult::True
    }

    /// [2006] Segmentgruppe ist mindestens einmal für jede Zeitraum-ID aus dem DE9013 der SG5 STS+Z23+Z33 (Berechnungsformel angefügt) anzugeben
    // REVIEW: Finds STS+Z23 (Status der Berechnungsformel) where status code (elements[1][0]) = 'Z33' (formula attached), collects Zeitraum-IDs from DE9013 (elements[2][0]). For each such ID, checks that at least one SG8 RFF+Z46 (elements[0][1]) references it, confirming the calculation formula group appears at minimum once per qualifying Zeitraum-ID. (medium confidence)
    fn evaluate_2006(&self, ctx: &EvaluationContext) -> ConditionResult {
        // Collect Zeitraum-IDs from STS+Z23 (Berechnungsformel) where status code = Z33 (angefügt)
        let sts_z23 = ctx.find_segments_with_qualifier("STS", 0, "Z23");
        let zeitraum_ids: Vec<String> = sts_z23
            .iter()
            .filter(|s| {
                s.elements
                    .get(1)
                    .and_then(|e| e.first())
                    .is_some_and(|v| v == "Z33")
            })
            .filter_map(|s| s.elements.get(2).and_then(|e| e.first()).cloned())
            .filter(|id| !id.is_empty())
            .collect();
        if zeitraum_ids.is_empty() {
            return ConditionResult::Unknown;
        }
        // For each Zeitraum-ID, at least one SG8 RFF+Z46 must reference it
        let rff_z46 = ctx.find_segments_with_qualifier("RFF", 0, "Z46");
        for zid in &zeitraum_ids {
            let count = rff_z46
                .iter()
                .filter(|s| {
                    s.elements
                        .first()
                        .and_then(|e| e.get(1))
                        .is_some_and(|v| v == zid)
                })
                .count();
            if count < 1 {
                return ConditionResult::False;
            }
        }
        ConditionResult::True
    }

    /// [2007] Segmentgruppe ist genau einmal für jede Zeitraum-ID aus dem DE9013 der SG5 STS+Z23+Z33 (Berechnungsformel angefügt) anzugeben
    // REVIEW: The condition says the segment group must appear exactly once for each Zeitraum-ID from SG5 STS+Z23+Z33 (Berechnungsformel angefügt). From the MIG reference, STS with Statuskategorie Z23 has elements[0][0]=Z23, elements[1][0]=status code (Z33=angefügt), and elements[2][0]=Zeitraum-ID. The evaluator returns True when at least one such STS+Z23+Z33 is present in the message, which is when the cardinality rule triggers. Full cardinality counting (exactly one group per Zeitraum-ID) would require navigator-level group instance counting and cross-referencing, which goes beyond what the boolean ConditionResult can express — the condition is really a presence trigger for the group requirement. (medium confidence)
    fn evaluate_2007(&self, ctx: &EvaluationContext) -> ConditionResult {
        // Condition 2007: Segment group required exactly once per Zeitraum-ID from SG5 STS+Z23+Z33
        // Evaluates to True when at least one STS in SG5 has Statuskategorie=Z23 and Status=Z33
        // (Berechnungsformel angefügt), indicating the group must be present for that Zeitraum-ID.
        // STS Z23 structure: elements[0][0]=Z23 (Statuskategorie), elements[1][0]=Z33 (Status), elements[2][0]=Zeitraum-ID
        let sts_segments = ctx.find_segments("STS");
        let has_z23_z33 = sts_segments.iter().any(|s| {
            s.elements
                .first()
                .and_then(|e| e.first())
                .is_some_and(|v| v == "Z23")
                && s.elements
                    .get(1)
                    .and_then(|e| e.first())
                    .is_some_and(|v| v == "Z33")
        });
        ConditionResult::from(has_z23_z33)
    }
}