Must not"> must"> Must"> ]>

Either a non-negative integer or unbounded

A restricted XPath (XML Path Language, James Clark and Steve DeRose, eds., W3C, 16 November 1999.) expression.

Should be a bibref

A non-empty list of restricted XPath expressions.

Required if is keyref, otherwise ( is key or unique) forbidden.

If a value is present, its must be key or unique.

Required if is absent, otherwise ( is present) forbidden. Required if is absent, otherwise ( is present) forbidden.

As defined in Extensible Markup Language (XML) 1.0, Second Edition, Tim Bray et al., eds., W3C, 6 October 2000.

Should use bibref

If the datatype has been &derived; by restriction then the component from which it is &derived;, otherwise the .

Required if is atomic, otherwise forbidden.

&Must; be a built-in definition.

Required if is list, otherwise forbidden.

&Mustnot; be empty if is union, otherwise &must; be absent.

Added in version 1.1.

Specifies a set of namespaces, either the universe, or an enumeration, or the complement of an enumeration.

Specifies the interpretation of this constraint.

Added in version 1.1.

Required if is element-only or mixed, otherwise forbidden. Required if is simple, otherwise forbidden.

Added in version 1.1.

Required if is local, otherwise forbidden.