Parameter entities references are NOT RECOGNIZED in default attribute values. Tests parsing of alternative forms of text-only mixed content declaration. Comments don't get parameter entity expansion Tests clauses 1, 3, and 4 of the Element Valid validity constraint. Tests use of external parsed entities with and without content. Tests use of external parsed entities with different encodings than the base document. A non-standalone document is valid if declared as such. A non-standalone document is valid if declared as such. A non-standalone document is valid if declared as such. A non-standalone document is valid if declared as such. NOTATION declarations don't need SYSTEM IDs; and externally declared notations may be used to declare unparsed entities in the internal DTD subset. The notation must be reported to the application. Tests declarations of "children" content models, and the validity constraints associated with them. Tests the #REQUIRED attribute declaration syntax, and the associated validity constraint. A document may be marked 'standalone' if any optional whitespace is defined within the internal DTD subset. A document may be marked 'standalone' if any attributes that need normalization are defined within the internal DTD subset. A document may be marked 'standalone' if any the defined entities need expanding are internal, and no attributes need defaulting or normalization. On output, requires notations to be correctly reported. Like sa03 but relies on attribute defaulting defined in the internal subset. On output, requires notations to be correctly reported. Like sa01 but this document is standalone since it has no optional whitespace. On output, requires notations to be correctly reported. XML permits token reuse, while SGML does not. Tests a lowercase ISO language code. Tests a ISO language code with a subcode. Tests a IANA language code with a subcode. Tests a user language code with a subcode. Tests an uppercase ISO language code. Tests a user language code. Tests construction of internal entity replacement text, using an example in the XML specification. Tests construction of internal entity replacement text, using an example in the XML specification. Tests construction of internal entity replacement text, using a complex example in the XML specification.