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§20 family: Dimensions (§20.4.19, §20.4.22 to §20.4.30) #144
Description
Spec: ODA Open Design Specification for .dwg files v5.4.1, §20.4.19, §20.4.22, §20.4.23, §20.4.24, §20.4.25, §20.4.26, §20.4.27, §20.4.28, §20.4.29, §20.4.30.
Sections and their state on main (2026-10-21)
| Section | State | Code | Note |
|---|---|---|---|
| §20.4.19 ARC_DIMENSION (p. 119) | missing |
- | |
| §20.4.22 Common dimension data (p. 121) | closes |
src/entities/dimension.rs | |
| §20.4.23 DIMENSION (ORDINATE) (20) (p. 122) | closes |
src/entities/dimension_ordinate.rs | |
| §20.4.24 DIMENSION (LINEAR) (21) (p. 123) | closes |
src/entities/dimension_linear.rs | |
| §20.4.25 DIMENSION (ALIGNED) (22) (p. 123) | closes |
src/entities/dimension_aligned.rs | |
| §20.4.26 DIMENSION (ANGULAR, 3-PT) (23) (p. 124) | closes |
src/entities/dimension_angular_3p.rs | |
| §20.4.27 DIMENSION (ANGULAR, 2-LINE) (24) (p. 125) | closes |
src/entities/dimension_angular_2l.rs | |
| §20.4.28 DIMENSION (RADIUS) (25) (p. 126) | closes |
src/entities/dimension_radial.rs | |
| §20.4.29 DIMENSION (DIAMETER) (26) (p. 126) | closes |
src/entities/dimension_diameter.rs | |
| §20.4.30 LARGE_RADIAL_DIMENSION (p. 127) | missing |
- |
closes comes from the boundary checks on the local 19-file corpus (STATUS.md, 2026-08-30). It is re-measured on the public corpus in CI by the 0.2.0 measurement epic, and no section is complete until its values equal AutoCAD's own DXF export.
Acceptance, for every section above
- Every field of its prescription is read, with every version branch the section names
- Where the section prints an example, its bytes are a committed fixture and decode to the values printed
- The field list ends on the record's exact data-stream boundary (and string/handle-stream boundaries on R2007+) on every corpus record of the type, on every release band
- Every value equals AutoCAD's DXF export of the same drawing, matched by handle (DXF group 5), with the scorer from the oracle epic
- The corpus holds at least one record of the type on each release band, R13 to R2018; a band without one is recorded on the corpus epic, not assumed
- Its row in docs/spec-coverage.md moves to
complete, with the evidence linked
Subtasks
- §20.4.19 ARC_DIMENSION (no decoder yet)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.22 Common dimension data
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.23 DIMENSION (ORDINATE) (20)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.24 DIMENSION (LINEAR) (21)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.25 DIMENSION (ALIGNED) (22)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.26 DIMENSION (ANGULAR, 3-PT) (23)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.27 DIMENSION (ANGULAR, 2-LINE) (24)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.28 DIMENSION (RADIUS) (25)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.29 DIMENSION (DIAMETER) (26)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.30 LARGE_RADIAL_DIMENSION (no decoder yet)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
A subtask becomes its own issue when someone picks it up; that issue quotes the section's field list and names the corpus records it is measured on.
Parent: #138
Activity
feat(dxf): score the DIMENSION family in the value oracle (§20.4.22 t…