Complete the structural DTD validation layer. AttributeType now distinguishes
the ID family; the validator does a second pass after the structural walk
(since an IDREF may point forward to an ID later in the document):
- ID-typed attribute values must be unique across the document.
- IDREF values must each resolve to a declared ID.
- IDREFS values are split on whitespace and each token must resolve.
Reimplemented from the DTD ID/IDREF spec; no upstream code copied. 4 tests; 79
total.
Mihaela Mihaljevic
537b455ce8