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PureXML/Sources/Schema
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Mihaela Mihaljevic 6a7bf78903 fix(schema): literal RecurseAsIfGroup for a non-repeating base choice 
An element restricting a base choice was always checked by the
effective-total-range approximation, which exists for one reason: the
literal section 3.9.6 pairing has no allowance for occurrence counts
accumulated across the choice's own repetitions and over-rejects
W3C-read-valid schemas (particlesZ001, whose manifest calls the rule
ambiguous). That ambiguity is impossible when the choice cannot repeat:
at {max occurs} = 1 every accepted child comes from one traversal of one
branch, so the literal rule governs. elementRestrictsChoice now applies
the literal pairing (the derived element, with its own occurrence range,
must validly restrict some non-pointless branch) when base maxOccurs is
1, and keeps the effective-range reading only for repeating choices.

Closes XSTS particlesHa161 (a derived a{0,1} is not a pointwise
NameAndTypeOK restriction of a required branch a{1,1}) and particlesM034
(a derived d1+ cannot map into the branch (d1*, d2+): the required d2 is
unmapped and not emptiable). The settled-valid neighbors that pin the
boundary from the other side all still pass: Ha160, M002, M003, M035,
and the Z001 shape, each now a regression test in
XSDParticleChoiceRestrictionTests. invalid-schemas-accepted 6 -> 4.

particlesIg004 is reclassified as spec-divergent (4 -> 3): section 3.3.2
maps block="#all" and the explicit substitution/extension/restriction
list to the SAME {disallowed substitutions} set, so NameAndTypeOK clause
5's superset requirement holds and the invalid expectation has no spec
path; it is jointly unsatisfiable with the settled Ig001/002/003 (equal
sets, valid) and Ig005 (#all covers the triple, valid).

The remaining three schema deviations are documented divergences, not
open bugs: Ik025/Ik027 (cos-st-derived-ok 2.2.4 reading) and schN12,
newly adjudicated in docs/xsts-deviations.md: its chameleon redefine
fails src-redefine 6.2.2 on NameAndTypeOK clause 1 (no-namespace locals
vs qualified locals), but 6.2.2 cannot be enforced uniformly because
mgO013's settled-VALID schema also violates it; any uniform enforcement
trades a false negative for a valid-schema-rejected false positive.

Also corrects the stale deviations-doc row that listed the already-closed
particlesIk011 and omitted schN12; the failures file is the authority.

Gates: full XSTS release suite green at 0/3/0/4 (valid buckets unchanged
at zero), libxml2 differential green at 244 pinned entries (Ha161 and
M034 newly pinned, both compile under libxml2), full local gate green.
2026-07-05 08:58:35 +02:00
..
BuiltinType.swift fix(schema): compare identity-constraint fields across the decimal value space; invalid-instances-accepted 95 to 94 (#147) 2026-06-18 11:01:05 +02:00
ComplexType.swift fix(schema): reject substitution-member swaps in particle restriction 2026-07-05 08:27:55 +02:00
ComplexValidator.swift perf(schema): graph-structured-stack content matcher, killing the last 2^K content-model hang (#364) 2026-06-28 05:07:37 +02:00
ComplexValidatorAttributes.swift fix(schema): resolve defaulted/fixed IDREF attributes against IDs 2026-06-22 18:56:36 +02:00
ComplexValidatorContentModel.swift perf(schema): graph-structured-stack content matcher, killing the last 2^K content-model hang (#364) 2026-06-28 05:07:37 +02:00
ComplexValidatorDerivation.swift fix(schema): block an xsi:type that reaches a union declared type through a member (#277) 2026-06-24 21:12:35 +02:00
ComplexValidatorHelpers.swift fix(schema): resolve an unprefixed xsi:type in the instance namespace context (#383) 2026-06-29 10:10:04 +02:00
ComplexValidatorIDs.swift fix(schema): enforce document-scoped xs:ID uniqueness and xs:IDREF resolution 2026-06-13 19:17:34 +02:00
ComplexValidatorStreaming.swift fix(schema): optional xs:all group requires its members when present 2026-06-22 18:29:09 +02:00
ComplexValidatorXSIType.swift fix(schema): advance XSTS valid-instances-rejected to 4 (#146) 2026-06-16 22:22:05 +02:00
ContentMatcher.swift fix(schema): saturate effectively-unbounded content-model counters (#192, partial) 2026-06-21 13:16:24 +02:00
ContentModelDeterminism.swift feat(schema): compositional UPA determinism, delete positionCap 2026-06-22 22:19:44 +02:00
ContentModelDeterminismCompositional.swift perf(schema): make the UPA determinism check depth-safe on group-reference chains (#371) 2026-06-28 23:15:32 +02:00
ContentModelDeterminismConflict.swift perf(schema): make the UPA determinism check depth-safe on group-reference chains (#371) 2026-06-28 23:15:32 +02:00
ContentModelEffectiveModel.swift fix(schema): check UPA over an extension's effective content model 2026-06-21 22:12:32 +02:00
ContentModelGroupDependency.swift perf(schema): make the UPA determinism check depth-safe on group-reference chains (#371) 2026-06-28 23:15:32 +02:00
ContentNFABuilder.swift fix(schema): count content-model occurrences 2026-06-19 23:32:04 +02:00
ContentRTN.swift perf(schema): graph-structured-stack content matcher, killing the last 2^K content-model hang (#364) 2026-06-28 05:07:37 +02:00
ContentRTNMatcher.swift perf(schema): assert the GSS matcher's runtime bound by count, not wall-clock (#369) 2026-06-28 20:36:54 +02:00
DateTimeParser.swift fix(schema): reject year 0000 in dateTime, date, gYearMonth, gYear 2026-06-20 01:31:14 +02:00
DateTimeValue.swift feat(schema): XSD simple-type datatype library with facets 2026-06-08 06:29:37 +02:00
DecimalValue.swift feat(schema): XSD simple-type datatype library with facets 2026-06-08 06:29:37 +02:00
DerivationMethod.swift feat(schema): XSD derivation control (abstract, block, final, redefine) 2026-06-08 14:14:23 +02:00
DurationValue.swift style(schema): drop vestigial day clamp in DurationValue.instant 2026-06-13 18:04:25 +02:00
GroupParticleMemo.swift feat(schema): carry a stable group-definition identity on shared expansions (#363) 2026-06-28 01:53:58 +02:00
IdentityConstraint.swift fix(schema): resolve identity-constraint XPath prefixes against the schema (#147) 2026-06-17 00:03:13 +02:00
IdentityFieldSimplicity.swift fix(schema): reject an identity-constraint field that selects a non-simple node (#381) 2026-06-29 09:08:25 +02:00
IdentityFieldType.swift fix(schema): reject identity field whose declared target is a non-simple complex type 2026-06-22 13:10:30 +02:00
IdentityFieldValue.swift fix(schema): default/fixed value for identity-constraint fields; invalid-instances-accepted 50 to 45 (#147) 2026-06-18 14:47:47 +02:00
IdentityTupleSet.swift perf(schema): make xsd identity-constraint validation linear (#312) 2026-06-26 02:45:17 +02:00
IdentityValidator.swift fix(schema): reject an identity-constraint field that selects a non-simple node (#381) 2026-06-29 09:08:25 +02:00
IdentityValidatorDefaults.swift fix(schema): default/fixed value for identity-constraint fields; invalid-instances-accepted 50 to 45 (#147) 2026-06-18 14:47:47 +02:00
IDTracker.swift fix(schema): enforce document-scoped xs:ID uniqueness and xs:IDREF resolution 2026-06-13 19:17:34 +02:00
Lexical.swift feat(schema): XSD simple-type datatype library with facets 2026-06-08 06:29:37 +02:00
OccurrenceRange.swift fix(schema): count content-model occurrences 2026-06-19 23:32:04 +02:00
ParticleNormalization.swift fix(schema): normalize content model, scope occurrence subsumption in particle restriction 2026-06-14 17:18:38 +02:00
ParticleRestriction.swift fix(schema): literal RecurseAsIfGroup for a non-repeating base choice 2026-07-05 08:58:35 +02:00
ParticleRestrictionChoice.swift fix(schema): literal RecurseAsIfGroup for a non-repeating base choice 2026-07-05 08:58:35 +02:00
ParticleRestrictionElement.swift fix(schema): apply cos-st-derived-ok to NameAndTypeOK over a union base (#359) 2026-06-27 23:45:40 +02:00
ParticleRestrictionHelpers.swift fix(schema): eliminate the last false positive (particlesZ001); false-positives = 0 (#148) 2026-06-17 19:56:57 +02:00
Primitive.swift fix(schema): match a NaN value against a NaN enumeration (value-space identity) (#376) 2026-06-29 05:20:07 +02:00
RelaxNGCompactHelpers.swift feat(relaxng): fold RNC ~ string concatenation 2026-06-08 17:38:58 +02:00
RelaxNGCompactLexer.swift feat(relaxng): add compact syntax (RNC) and include/externalRef 2026-06-08 09:13:09 +02:00
RelaxNGCompactParser.swift feat(relaxng): skip RNC >> follow-annotations, completing #79 2026-06-09 03:20:47 +02:00
RelaxNGContentType.swift feat(relaxng): schema-correctness validation, spec suite complete 2026-06-10 11:38:45 +02:00
RelaxNGDerivative.swift feat(relaxng): QName values with dual-context resolution, instance level clean 2026-06-10 10:57:14 +02:00
RelaxNGDiagnostics.swift feat(relaxng): distinguish undeclared attribute from invalid value 2026-06-09 01:11:54 +02:00
RelaxNGFacets.swift fix(schema): advance XSTS valid-instances-rejected to 4 (#146) 2026-06-16 22:22:05 +02:00
RelaxNGGrammarCheck.swift feat(relaxng): schema-correctness validation, spec suite complete 2026-06-10 11:38:45 +02:00
RelaxNGGrammarCheckSections.swift feat(relaxng): schema-correctness validation, spec suite complete 2026-06-10 11:38:45 +02:00
RelaxNGNameClasses.swift feat(relaxng): ns inheritance, QNames, include-start, combine, data-except 2026-06-10 10:24:46 +02:00
RelaxNGNode.swift feat(relaxng): grammar scoping, parentRef, include overrides, div flattening 2026-06-10 10:34:44 +02:00
RelaxNGParser.swift feat(relaxng): schema-correctness validation, spec suite complete 2026-06-10 11:38:45 +02:00
RelaxNGParserIncludes.swift feat(relaxng): schema-correctness validation, spec suite complete 2026-06-10 11:38:45 +02:00
RelaxNGPattern.swift feat(relaxng): QName values with dual-context resolution, instance level clean 2026-06-10 10:57:14 +02:00
RelaxNGRestrictionChecker.swift feat(relaxng): schema-correctness validation, spec suite complete 2026-06-10 11:38:45 +02:00
RelaxNGRestrictionOverlap.swift feat(relaxng): schema-correctness validation, spec suite complete 2026-06-10 11:38:45 +02:00
RelaxNGRestrictionPaths.swift feat(relaxng): schema-correctness validation, spec suite complete 2026-06-10 11:38:45 +02:00
RelaxNGRestrictions.swift feat(relaxng): schema-correctness validation, spec suite complete 2026-06-10 11:38:45 +02:00
RelaxNGSchema.swift feat(validation,schema): composable validation framework and cross-document composition 2026-06-16 09:57:43 +02:00
SchemaAllGroupPlacement.swift feat(schema): locate derivation/cycle-pass schema diagnostics 2026-06-21 16:53:02 +02:00
SchemaAttributeApplicability.swift feat(schema): locate structure-pass schema diagnostics 2026-06-21 15:23:13 +02:00
SchemaAttributeRestriction.swift fix(schema): reject a simpleContent restriction that relaxes a required attribute (#326) 2026-06-26 11:35:33 +02:00
SchemaAttributeUniqueness.swift fix(schema): flatten redefine self-reference and exclude prohibited uses in attribute uniqueness 2026-06-22 03:52:13 +02:00
SchemaCompileValidation.swift refactor(schema): remove unused [String] consistency wrappers (#317) 2026-06-26 08:02:09 +02:00
SchemaCompositionValidations.swift feat(schema): locate composition/redefine-pass schema diagnostics 2026-06-21 19:41:31 +02:00
SchemaContentDerivation.swift fix(schema): a complexContent restriction cannot restrict simple content 2026-06-22 19:40:57 +02:00
SchemaContentOrder.swift fix(schema): require a content derivation in simpleContent/complexContent (#145) 2026-06-17 14:58:58 +02:00
SchemaDerivationControl.swift feat(schema): key the instance derivation/substitution backbone by namespaced identity; re-land blockDefault; invalid-instances-accepted 89 to 81 (#186, #147) 2026-06-18 12:41:18 +02:00
SchemaDocument.swift fix(schema): reject an identity-constraint field that selects a non-simple node (#381) 2026-06-29 09:08:25 +02:00
SchemaDocumentHints.swift fix(schema): default/fixed value for identity-constraint fields; invalid-instances-accepted 50 to 45 (#147) 2026-06-18 14:47:47 +02:00
SchemaElementDeclarationsConsistent.swift refactor(schema): split Element-Declarations-Consistent out of SchemaStructure 2026-06-22 15:30:58 +02:00
SchemaExtensionAllGroup.swift feat(schema): locate extension/substitution-pass schema diagnostics 2026-06-21 18:35:38 +02:00
SchemaFacetApplicability.swift perf(schema): resolve a simple-type restriction chain in linear, not cubic, time (#373) 2026-06-29 02:55:02 +02:00
SchemaIDAttribute.swift refactor(schema): remove unused [String] consistency wrappers (#317) 2026-06-26 08:02:09 +02:00
SchemaIdentityXPath.swift fix(schema): an identity-constraint xpath may not use an undeclared prefix; invalid-schemas-accepted 77 to 75 (#145) 2026-06-18 01:01:12 +02:00
SchemaIDValueConstraint.swift feat(schema): locate ID-typed value-constraint errors 2026-06-21 14:37:29 +02:00
SchemaImportNamespace.swift feat(schema): locate reference-resolution schema diagnostics 2026-06-21 18:09:20 +02:00
SchemaNameUniqueness.swift refactor(schema): remove unused [String] consistency wrappers (#317) 2026-06-26 08:02:09 +02:00
SchemaNestedDefinition.swift feat(schema): locate structure-pass schema diagnostics 2026-06-21 15:23:13 +02:00
SchemaNotationValidity.swift feat(schema): locate names/UPA/notation-pass schema diagnostics 2026-06-21 19:16:54 +02:00
SchemaRedefineAttributeGroupRestriction.swift refactor(schema): split redefine attribute-group restriction into its own file 2026-06-22 15:07:53 +02:00
SchemaRedefineSelfReference.swift refactor(schema): split redefine attribute-group restriction into its own file 2026-06-22 15:07:53 +02:00
SchemaReferenceForeignPools.swift feat(validation,schema): composable validation framework and cross-document composition 2026-06-16 09:57:43 +02:00
SchemaReferenceResolution.swift fix(schema): an unprefixed type ref to a target-namespace type is undeclared 2026-06-21 23:17:14 +02:00
SchemaReferences.swift feat(schema): locate reference-resolution schema diagnostics 2026-06-21 18:09:20 +02:00
SchemaSimpleTypeFinal.swift feat(schema): locate simple-type-pass schema diagnostics 2026-06-21 15:55:59 +02:00
SchemaSimpleTypeValidity.swift feat(schema): locate simple-type-pass schema diagnostics 2026-06-21 15:55:59 +02:00
SchemaSimpleTypeVariety.swift perf(schema): resolve a simple-type restriction chain in linear, not cubic, time (#373) 2026-06-29 02:55:02 +02:00
SchemaStructure.swift refactor(schema): remove unused [String] consistency wrappers (#317) 2026-06-26 08:02:09 +02:00
SchemaStructureHelpers.swift feat(schema): locate structure-pass schema diagnostics 2026-06-21 15:23:13 +02:00
SchemaSubstitutionType.swift feat(schema): locate extension/substitution-pass schema diagnostics 2026-06-21 18:35:38 +02:00
SchemaUndeclaredNamespace.swift feat(schema): locate reference-resolution schema diagnostics 2026-06-21 18:09:20 +02:00
SchemaWildcardExpressibility.swift fix(schema): attribute-wildcard union/intersection per Errata E1-10 (#251) 2026-06-23 04:56:17 +02:00
SchemaWildcardNamespace.swift feat(schema): validate wildcard namespace constraint value space 2026-06-14 11:00:45 +02:00
SchemaXSIAttribute.swift feat(schema): locate attribute-pass schema diagnostics 2026-06-21 16:28:10 +02:00
SimpleContentMemo.swift perf(schema): memoize simpleContent base resolution so a chain is linear, not cubic (#374) 2026-06-29 03:26:07 +02:00
SimpleType.swift perf(schema): make xsd identity-constraint validation linear (#312) 2026-06-26 02:45:17 +02:00
StepSiblingIndex.swift perf(schema): make xsd identity-constraint validation linear (#312) 2026-06-26 02:45:17 +02:00
StreamingXSDValidator.swift fix(schema): streaming validator applies default/fixed value constraints 2026-06-20 17:38:45 +02:00
TypeDerivation.swift feat(schema): XSD derivation control (abstract, block, final, redefine) 2026-06-08 14:14:23 +02:00
XPathQueryCache.swift fix(schema): default/fixed value for identity-constraint fields; invalid-instances-accepted 50 to 45 (#147) 2026-06-18 14:47:47 +02:00
XSDAttributeParser.swift fix(schema): bound attribute-group reference depth so a deep chain cannot overflow the stack (#375) 2026-06-29 03:58:18 +02:00
XSDCompiled.swift fix(schema): reject an identity-constraint field that selects a non-simple node (#381) 2026-06-29 09:08:25 +02:00
XSDCompletions.swift perf(schema): graph-structured-stack content matcher, killing the last 2^K content-model hang (#364) 2026-06-28 05:07:37 +02:00
XSDComplexContent.swift perf(schema): bound content-model expansion depth so deep chains cannot overflow the stack (#372) 2026-06-29 01:54:21 +02:00
XSDContext.swift fix(schema): reject an identity-constraint field that selects a non-simple node (#381) 2026-06-29 09:08:25 +02:00
XSDDerivation.swift fix(schema): block an xsi:type that reaches a union declared type through a member (#277) 2026-06-24 21:12:35 +02:00
XSDDerivationTables.swift fix(schema): block an xsi:type that reaches a union declared type through a member (#277) 2026-06-24 21:12:35 +02:00
XSDParser.swift fix(schema): reject an identity-constraint field that selects a non-simple node (#381) 2026-06-29 09:08:25 +02:00
XSDParserHelpers.swift fix(schema): reject an identity-constraint field that selects a non-simple node (#381) 2026-06-29 09:08:25 +02:00
XSDParserParticles.swift fix(schema): reject substitution-member swaps in particle restriction 2026-07-05 08:27:55 +02:00
XSDParserTypeReferences.swift fix(schema): an untyped substitutionGroup member inherits its head's type 2026-06-20 02:47:07 +02:00
XSDParserUnion.swift docs: align stale figures with code and the enforced XSTS gate 2026-06-19 23:32:04 +02:00
XSDSchemaValidations.swift feat(validation,schema): composable validation framework and cross-document composition 2026-06-16 09:57:43 +02:00
XSDSimpleContentParser.swift perf(schema): memoize simpleContent base resolution so a chain is linear, not cubic (#374) 2026-06-29 03:26:07 +02:00
XSDSimpleParser.swift fix(schema): reject an unknown \p{...} category or block name (#248) 2026-06-23 02:15:26 +02:00
XSDSimpleParser+Facets.swift fix(schema): advance XSTS valid-instances-rejected to 4 (#146) 2026-06-16 22:22:05 +02:00
XSDSimpleTypeOrder.swift perf(schema): resolve a simple-type restriction chain in linear, not cubic, time (#373) 2026-06-29 02:55:02 +02:00
XSDSubstitutionMembers.swift fix(schema): stop blocked substitution chaining 2026-06-19 08:37:19 +02:00
XSDValidations.swift fix(schema): reject an identity-constraint field that selects a non-simple node (#381) 2026-06-29 09:08:25 +02:00
XSDWildcardParser.swift fix(schema): attribute-wildcard union/intersection per Errata E1-10 (#251) 2026-06-23 04:56:17 +02:00