A <value> pattern now carries its datatype, so matching compares the
instance and the literal in that type's value space rather than purely
lexically. Numeric and date/time types compare by value (1 equals 01,
1.5 equals 1.50); booleans treat 1/true and 0/false as equal; string and
token compare by their whitespace-normalized lexical form, as before.
Untyped values default to the built-in token type, and a bare string
literal in the compact syntax is token-typed. Durations and binary types
fall under the lexical rule.
Extend the schema parser toward full structural parity:
- list simple types validate each whitespace-separated item against the item
type and count items for the length facets; union simple types admit a value
valid for any member type. A restriction over a named list or union inherits
its variety.
- Named attribute groups are expanded (transitively) into every complex type
that references them.
- Named model groups are expanded at each xs:group ref, with a cycle guard;
element refs resolve to the referenced global element's declared type,
through a reserved type-table key so forward and recursive refs settle at
validation time.
Named simple types now resolve over repeated passes so they may restrict or
list one another regardless of document order. Simple-type and facet parsing
moves into a sibling XSDSimpleParser to keep each parser within bounds.
Closes#65
Add the PureXML.Schema namespace validating XSD Part 2 built-in datatypes
and constraining facets. Built-ins span string/boolean/decimal, the bounded
integer family with intrinsic bounds, float/double, duration, the eight
date/time types, hexBinary, base64Binary, anyURI, QName, and the
Name/NCName/NMTOKEN/language family. Facets: length/minLength/maxLength,
pattern (via the regex engine), enumeration (value-space comparison),
whiteSpace, min/maxInclusive/Exclusive, totalDigits, fractionDigits.
Decimals compare exactly with no floating-point loss; date/time fields are
range-validated with leap years, 24:00:00, and timezone bounds.
Closes#8
