# Format support

Office Tools 0.1.0 targets read-only browser viewing, not editing or
pixel-identical reproduction.

| Family                       | Extensions                            | 0.1 viewing coverage                                                                                           |
| ---------------------------- | ------------------------------------- | -------------------------------------------------------------------------------------------------------------- |
| Office Open XML document     | `.docx/.docm/.dotx/.dotm`             | Paginated sections, text, lists, tables, images, shapes, charts, headers/footers, comments, selection and find |
| Office Open XML spreadsheet  | `.xlsx/.xlsm/.xltx/.xltm`             | Sheets, cached values/formulas, styles, merges, frozen panes, images, charts, comments, navigation and find    |
| Office Open XML presentation | `.pptx/.pptm/.potx/.potm/.ppsx/.ppsm` | Slides/masters, text, shapes, images, tables, charts, notes, selection, navigation and find                    |
| OpenDocument text            | `.odt`                                | Semantic headings, runs, inherited styles, tables, images, metadata, comments and foot/endnotes                |
| OpenDocument spreadsheet     | `.ods`                                | Typed/cached values, formulas, repeats, merges, row/column defaults, visibility, annotations and paged rows    |
| OpenDocument presentation    | `.odp`                                | Page geometry, positioned/transformed shapes, groups, tables, packaged images, notes and safe styling          |

Legacy compound-binary `.doc`, `.xls` and `.ppt` formats are explicitly outside
the first package-reader slice. They require a distinct, bounded parser and must
not be misidentified as their XML successors.

The input boundary also identifies RTF, older OpenOffice `.sxw/.sxc/.sxi`, flat
OpenDocument `.fodt/.fods/.fodp`, renamed OLE Compound Files and invalid non-ZIP
packages. It explains the required conversion instead of passing them to a ZIP
or XML successor parser.

## Export paths

- `Save exact copy` downloads the original immutable File for every format.
- ODT exports plain semantic text; ODS exports the active sheet's cached display
  values as bounded UTF-8 CSV; ODP exports a text slide/notes outline.
- ODF inspection JSON excludes embedded asset bytes while retaining asset
  identities, sizes, styles, metadata and the bounded semantic structure.
- Derived exports are intentionally not advertised as round-trip replacements.

## Never executed

Macros, VBA projects, embedded executables, OLE objects, scripts, remote
templates and automatic external relationships remain inert. Unsupported
content is reported in diagnostics where it can be identified.

## Known boundaries

- Spreadsheet formulas display their saved cached result; Office Tools does not
  recalculate them or refresh pivots and external data.
- Presentation animations and transitions are not reproduced. Embedded media
  playback is disabled in the first release.
- OLE, ActiveX, VBA and OpenDocument embedded objects remain inert. The ODF
  semantic view reports and omits embedded objects such as chart subdocuments.
- OpenDocument slide masters/layouts are identified but not fully reproduced;
  uncommon drawing transforms and office-suite-specific layout can be
  approximated.
- Fonts are substituted locally. Remote fonts, templates, images and links are
  never fetched.
- ODS renders 200 rows at a time and up to 256 columns. Empty full-grid tails
  emitted by office suites are deliberately trimmed.

## Safety limits

The source-file limit is 100 MiB. OOXML and ODF packages also enforce expanded
entry, total expanded byte, entry-count and image limits. ODF additionally
bounds compression ratio, XML depth/nodes, text, repeats, cells and assets.
Files that exceed a boundary fail with a visible diagnostic instead of being
partially trusted.