Base-revision entities in this match/group.
OptionalchangedOn a respecified match whose two entities both carry
EntityFingerprint.components: the component keys whose sub-hash
differs, sorted, one-sided keys included — the same vocabulary as
DiffEntry.changedComponents. This is what a reviewer reads to see WHAT
changed on an element whose geometry did not.
The shared EntityFingerprint.dataHash that grouped these entities.
Empty ('') on a record the geometry-only stage produced from an N:N
geometry bucket, where no data hash grouped anything — geometryHash
did. A respecified pair carries the HEAD entity's data hash.
OptionaldistanceBounding-box-centre displacement base→head, in the caller's units.
Present only on moved/reshaped matches whose two entities both carried
an EntityFingerprint.aabb. Reported as 0 below
DiffOptions.moveTolerance, mirroring the viewer's
describeChange.ts clamp (issue #1197): sub-tolerance jitter is
tessellation noise, not a move.
OptionalgeometryThe shared world geometry hash, as a string, on records the geometry-only
stage produced (tier: 'geometry-only', and the ambiguous groups it
reports). Absent on every other record.
Head-revision entities in this match/group.
OptionaltierWhich refinement tier produced this record. See ContentMatchTier.
A content-hash-based match (or ambiguous match group) among entities the key-based pass classified as
added/deleted(issue #1891).renamed,moved,reshapedandrespecifiedare retiring kinds: the correspondingadded/deletedDiffEntry pairs are removed from ModelDiff.entries in favour of this record.moved,reshapedandrespecifiedalways hold exactly one entity per side;renamedholds one per side except for the same-data-and-geometry group described in ContentMatchKind, where it holdsNper side.For
duplicated,deduplicated, andambiguous,base/headhold every unresolved candidate, and those entities'added/deletedentries are left in ModelDiff.entries untouched — the engine reports the grouping instead of guessing a 1:1 pairing (see #1923).