Struct SchemaMeta 

pub struct SchemaMeta {
    pub type_predicate: Option<String>,
    pub predicate_stats: Vec<PredStat>,
    pub char_sets: Vec<CharSet>,
    pub class_hierarchy: Vec<ClassNode>,
    pub level_rollups: Vec<LevelRollup>,
    pub level_links: Vec<LevelLinks>,
    pub subclass_cycles: Vec<Vec<String>>,
    pub disjoint_pairs: Vec<(String, String)>,
    pub equivalent_pairs: Vec<(String, String)>,
}

A decoded SCHEMA section — or, for a file built before it existed, the same fields read from the pyramid-meta (see SchemaMeta::from_pyramid).

Fields

type_predicate: Option<String>

The type predicate the class rollups used; None when the graph has no typing (or the fields came from a pyramid-meta, which does not say).

predicate_stats: Vec<PredStat>

Per-predicate cardinality for the planner; see [PredStat].

char_sets: Vec<CharSet>

The commonest entity shapes; see [CharSet].

class_hierarchy: Vec<ClassNode>

The subClassOf DAG with per-class depth.

level_rollups: Vec<LevelRollup>

The per-level type histograms.

level_links: Vec<LevelLinks>

The per-level lateral class-relation graphs.

subclass_cycles: Vec<Vec<String>>

subClassOf cycles.

disjoint_pairs: Vec<(String, String)>

owl:disjointWith class pairs.

equivalent_pairs: Vec<(String, String)>

owl:equivalentClass class pairs.

Implementations

impl SchemaMeta

pub fn is_empty(&self) -> bool

True when the section would carry nothing.

pub fn from_pyramid(p: &PyramidMeta) -> Self

The schema fields of a pyramid-meta (files built before kind 9).

pub fn encode(&self) -> Vec<u8>

Encode the whole section, digest first. Empty for an empty schema.

pub fn decode(section: &[u8]) -> Result<Self, FileError>

Decode a section, checking its digest and version.

Trait Implementations

impl Clone for SchemaMeta

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SchemaMeta

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SchemaMeta

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for SchemaMeta

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for SchemaMeta