Datatypes

Built-in Types

A solid foundation If you're looking for datatypes, the spec has string, boolean, float, double, decimal, timeInstant, timeDuration, recurringInstant, binary, uri-reference, ID, IDREF, ENTITY, NOTATION, language, IDREFS, ENTITIES, NMTOKEN, NMTOKENS, Name, QName, NCName, Integer, non-positive integer, negative-integer, long, int, short, byte, non-negative integer, unsigned-long, unsigned-int, unsigned-short, unsigned-byte, positive-integer, date and time.
A separate spec The Datatypes spec is separate from the Schema structures spec, making it possible to use independently.
Extensible data types Patterns and facets can be used to create new datatypes from the built-in set. (Everything in the list above after NOTATION is derived inside the spec, in fact.)