# Format support
Capability matrix for the four implemented formats. `✓` = supported and
answerable; `—` = a typed decline (`unsupported-feature`, exit 6), never a
silent empty answer. The format is detected from bytes, never a file name.
## Exactness and detection
| Byte-based detection | `%PDF-` + indirect object + `%%EOF` | OPC ZIP package | OCF ZIP container | ODF ZIP package (`mimetype`/manifest) |
| Physical authority | owned lexer + span scanner | shared byte-authoritative ZIP | shared byte-authoritative ZIP | shared byte-authoritative ZIP |
| `materialize == original` (length + SHA-256 + `cmp`) | ✓ | ✓ | ✓ | ✓ |
| Exact after source **and** descriptor deletion, fresh process | ✓ | ✓ | ✓ | ✓ |
## Common observation vocabulary
The shared vocabulary is added for all four formats (ADR-0031); a common
observation is a *projection*, never the document model.
| `metadata` | ✓ (descriptor identity) | ✓ (story structure) | ✓ (package summary) | ✓ (content summary) |
| `text` | ✓ | ✓ | ✓ | ✓ |
| `find` (lexical search) | ✓ | ✓ | ✓ | ✓ |
| `heading` | — | ✓ | ✓ | ✓ |
| `block` (paragraph-ish) | — | ✓ | ✓ | ✓ |
| `table` / `cell` | — | ✓ | ✓ | ✓ |
| `resource` | — | ✓ | ✓ | ✓ |
| `link` | — | ✓ | ✓ | ✓ |
`metadata` is a shared *selector name* with per-format semantics, not a shared
meaning: the PDF lane returns its own `source_len`/`source_sha256`, DOCX a story
structure, EPUB a package summary, ODT a content summary.
## Native observations
| Object / stream / revision | ✓ | — | — | — |
| Story | — | ✓ | — | — |
| Paragraph / heading / table / cell | — | ✓ | ✓ | ✓ |
| Package part / relationship | — | ✓ | ✓ | ✓ (`odt-part`) |
| Manifest / spine item / nav | — | — | ✓ | ✓ (ODF manifest) |
| Members (raw / decoded) | — | ✓ | ✓ | ✓ |
| Page | ✓ (intrinsic) | — (no pagination) | only when the publication defines it | — (no pagination) |
| Byte range | ✓ | ✓ | ✓ | ✓ |
Reflowable EPUB has no intrinsic pages, DOCX has no intrinsic pagination, and ODT
has no intrinsic pagination; `Page(n)` is never synthesized (ADR-0033/0038).
## Exactness after removal — receipts
| Source + descriptor removal (all three formats) | 38/38 | `evidence/campaigns/2026-10-06-phase12-removal-dc4d5a3/` |
| DOCX/EPUB logical triplet equivalence | 96/96 | `evidence/campaigns/2026-10-06-phase12-triplet-dc4d5a3/` |
| PDF no-regression (A2 vs A11) | 32/32 exact, 0 regressions | `evidence/campaigns/2026-10-06-phase12-pdf-noregression-0d23a02/` |
| Hostile ZIP/OPC/OCF/XML fixtures | 315/315 assertions | `evidence/campaigns/2026-10-06-phase12-security-33f6d04/` |
| ODT adapter (detection/content/profiles/exactness/removal/decline) | 9/9 | `evidence/campaigns/2026-10-07-phase13-odt-95c486d/` |
See [Status ledger](../project/status.md) for the full mechanism table and
[Conformance](../reference/conformance.md) for the courts.
## Feature gates
The default build is `default = ["rans", "store", "field"]`. The ZIP/DOCX/EPUB/ODT
adapters need `package,opc,docx,epub,odt`. `deflate-replay` is opt-in (pulls LGPL
`cabac`). A descriptor that needs a capability the build lacks sets a mandatory
feature bit and fails closed with `unsupported-feature` (exit 6).
Phase 15 adds performance-only, non-default features that change **no** wire bytes,
no persisted artifact, and no decoder behavior:
| `parallel` | `--workers N` bounded parallel ingest (ADR-0044) | `rayon` |
| `memmem-scan` | SIMD `memchr::memmem::Finder` for the PDF `find_endstream` scan (implied by `field`/`package`) | `memchr` |
| `miniz-simd` | `miniz_oxide`'s SIMD adler-32 path (output-preserving) | `simd-adler32` |
| `deflate-ablation` | the `examples/deflate_ablation.rs` harness (measures only; ADR-0045) | `zlib-rs`, `zune-inflate` |
The field CLI flags add `--workers N`, `--packed` (with `--sync=batch|each`),
and `--promote[=BYTES]`, plus the `observe-batch` command — see the [CLI](cli.md).
`--packed` and `--workers` are the two Phase-15 mechanisms that touch a persisted
artifact or a runtime path (`--sync` selects the packed writer's durability policy,
ADR-0053); `--promote` is refuted on the tested corpus and default-off (ADR-0046).
## Not supported
Containers beyond PDF/DOCX/EPUB/ODT (e.g. XLSX, PPTX) are `PROPOSED`, not
implemented (see [Roadmap](../project/roadmap.md)). Any source that is not a
recognized format still round-trips exactly through the opaque `RAW` lane.