pub const OCCURRENCE_REF_PREFIX: &str = "OCC";Expand description
The reference-name prefix an OCCURRENCE-scoped annotation carries out of a
structured import, until its consumer rewrites it:
OCC#<edge>#<edge>…:<part-local name>, the occurrence chain root first.
An empty chain (OCC:) is the root product’s own geometry.
# cannot occur in a name this importer mints, so a consumer finds every
one of them by prefix alone.