The two monolithic XSD content/identity rules only satisfied the OpenAPIKit
validation idiom at the wrong granularity: no per-constraint removability,
no isolable failing/near-miss tests. Split them into 32 named rules, each
finding tagged at its origin and cached per XSDContext so the walk still
runs once per document (the #101 decision against duplicating XSD's
recursive type resolution still holds). Wired the streaming path's ID/IDREF
and identity checks through the same framework instead of calling the
validators imperatively, and added the unwrapAndLookup combinator the rule
already named as required.
Also includes the mandated repo-wide swiftformat/swiftlint pass.
A RELAX NG schema document is validated before pattern interpretation
in three layers: the section-3 grammar check (vocabulary, attributes,
arity, text, QNames, datatypeLibrary URIs, hrefs, 4.16 excepts, xmlns
prohibitions), compiler checks (4.17 combine rules, unresolved refs,
parentRef scope, startless grammars, include/externalRef cycles and
overrides, grammar-checked loaded documents, unknown datatypes,
built-in-library params), and the 4.19/7.1-7.4 restrictions over the
compiled algebra after 4.20/4.21 normalization (prohibited paths,
content types, duplicate attributes via representative-name overlap,
infinite-class attributes outside oneOrMore, interleave constraints),
with recursion detection deliberately before normalization. Incorrect
schemas: 213 compiling down to 7, all the pre-Fifth-Edition name-class
class (count asserted). Two leniency tests updated to spec behavior.
Closes#131
