OptionalcontentDefines valid attribute value types.
OptionalfixedIf the value is fixed. It is expected that at least strict validation would consider any other value despite the fixed value as invalid.
The local name of an attribute.
OptionalnamespaceNamespace URI of attribute. If unset, it may be guessed from prefix if it is a well-known prefix.
OptionalprefixThe prefix of an attribute. null none.
OptionalrequiredIf required and missing: Use the given value as default value.
OptionalvalidateValidate a given value. By default forwards to attribute content definition.
value to validate
strictness level to respect
Definition of an attribute, closely related to DTD definition.