Convert the seven structure-pass compile checkers to located findings so
each error attaches to its own declaring node instead of the schema root
(#169): a facet inapplicable to a list/union variety, a restriction of
xs:anySimpleType and a constraining facet on anySimpleType-based simple
content, a top-level definition missing its name or carrying a local-only
attribute, a nested named definition, an empty targetNamespace or import
namespace, and an all-group reference with an illegal minOccurs/maxOccurs.
The rewire in structureFindings preserves the prior finding order and
count; each error predicate and reason string is unchanged, only the
location each finding carries differs. Adds a located-diagnostics test
per checker family in a new suite kept within the type-body budget.
A local element declaration (one not a child of schema) must identify itself
with a name or a ref; an xs:element with neither is invalid. localElementErrors
now flags it, alongside the existing local-element forbidden-attribute checks.
XSTS: invalid-schemas-accepted 80 to 79 (elemP005), valid-schemas-rejected held
at 0, no other bucket moved.
A local element declaration (an element particle, not a direct child of schema)
may not carry abstract, final, or substitutionGroup, which belong to the
top-level element form only. Their presence is invalid at any value, so
abstract=false on a local element is rejected as well as abstract=true.
XSTS invalid-schemas-accepted 194 to 189, no other bucket moved.
An attribute ref is a use of a global declaration, so it may not also carry
form (src-attribute.3.2). And no attribute declaration may be named xmlns,
which is reserved for namespace declarations (no-xmlns).
XSTS invalid-schemas-accepted 207 to 203, no other bucket moved.
Reject top level declarations that omit a name attribute. Disallow derivation by restriction of xs:anySimpleType inside simpleType definitions. Require restriction facets length, minLength, maxLength, totalDigits, and fractionDigits to restrict or equal the base type facets. Updates the conformance baseline to 383 accepted invalid schemas.
A top-level xs:element declaration (a direct child of schema, or of redefine) was
accepted with ref, form, minOccurs, or maxOccurs. A global element is a
declaration, never a particle or a reference, so those local-use attributes are
prohibited by the schema-for-schemas topLevelElement. The top-level-attribute
applicability scan is generalized into topLevelDeclarationErrors, driven by a
per-kind forbidden-attribute map, covering both attribute and element. A local
element particle inside a content model is unaffected.
XSTS: invalid schemas accepted 424 to 422, no other bucket raised.
An element ref carrying nillable/default/fixed/form/block, or an element or
attribute ref carrying an inline type definition, was accepted. A ref is a use
of a global declaration, not a declaration, so beyond ref it admits only
minOccurs, maxOccurs, and id (src-element.2.2). The applicability check already
excluded name and type from a ref; this extends the exclusion to the remaining
declaration-only properties and to an inline simpleType/complexType child.
minOccurs/maxOccurs, a group/attributeGroup ref, and an attribute ref's
use/default/fixed (which override on the use) are unaffected.
XSTS: invalid schemas accepted 439 to 424, no other bucket raised. Disclosed
under-detection: a key/unique/keyref child under a ref is not yet flagged.
A top-level xs:attribute declaration (a direct child of schema, or of redefine)
was accepted with use, form, or ref. Those belong to a local attribute use, not
a global declaration: the schema-for-schemas topLevelAttribute marks ref, form,
and use as prohibited, allowing only default, fixed, id, name, type and an inline
simpleType. The per-component applicability table is the permissive global/local
union, so it could not draw the distinction; a focused scan of the direct
attribute children of schema and redefine supplies the global-only constraint. A
local attribute use inside a complex type or attribute group is unaffected.
The existing test_validAttributeValues asserted a top-level attribute with use
compiles, which is itself invalid; corrected to a local attribute use.
XSTS: invalid schemas accepted 454 to 439, no other bucket raised.
An <xs:element> or <xs:attribute> may not carry both a type attribute and an
inline anonymous type definition (src-element.3 / src-attribute.3.1): an
attribute may have only an inline simpleType, an element a simpleType or
complexType. Such schemas were accepted.
Only an inline type in the XSD namespace counts; a foreign-namespace child whose
local name happens to be complexType/simpleType is not the component's own type
definition (foreign content is not structurally checked), so it is not flagged
(an adversarial critic's finding, fixed with the namespace guard and a test).
The attribute-applicability function and its allowed-attributes table were
extracted to SchemaAttributeApplicability.swift (a pure move) to keep
SchemaStructure.swift within the file-length limit.
XSTS: invalid schemas accepted 495 to 489 (addB081, attKa011, attKb014,
attKc014, typedef00501m2, typedef00502m2 now rejected), no other bucket raised.
