A set that contains all characters that have property X that can be identified with a category escape \p{X}. The complement of this set is specified with the category escape \P{X}. ([\P{X}]=[^\p{X}]).
catEsc ::= '\p'{' charProp '}'
complEsc ::= '\P{' charProp '}'
charProp ::= IsCategory | IsBlock
XML Schema Regular Expressions | XML Schema Regular Expressions Reference Chart | Data Type Facets