Specificity

Scoring and tie behavior by subsystem

Tagged URN Score

TaggedUrn::specificity uses graded scores:

K=v = 3
K=* = 2
K=! = 1
K=? = 0

specificity_tuple() exists, but it is not universally used by CAP selection paths.

CAP URN Score

CapUrn::specificity counts:

Input media tag count, unless in=media: (wildcard, contributes 0)
Output media tag count, unless out=media:
+1 for each non-* non-direction tag

Tie Behavior Matrix

UrnMatcher::find_all_matches: sorts by score descending only.
CapMatrix::find_best_cap_set: replaces best only on strict >. Score ties keep first encountered match.
CapBlock::find_best_cap_set: strict > across registries. Score ties keep first registry in registration order.

References