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.
Mihaela Mihaljevic
0142ecb35e