Return type: Boolean
Returns:       

True or false.

  attribute attribute-name element-qualifier*
     (indexer)? (is | isnt)
     (cdata | name | names | number | numbers | nmtoken |
       nmtokens | id | idref | idrefs | notation | entity | entities | group)

You can use the attribute is test to determine whether an attribute is of a specified type. For example, the following code will succeed if attribute "foo" is of type "name", and will fail otherwise:

  attribute "foo" is name

Attribute type tests can be combined by joining the types with or (|) and parenthesizing them. Note that for a data attribute, a test of its type for id, idref, idrefs, notation, entity, or entities will always fail because those types of attributes cannot be associated with a notation.

Entity and notation attribute tests can be applied directly to attribute values which are declared as entity or notation, or directly to an item of an attribute declared as entities.

Related Syntax    attribute

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