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operator	status is

Summary

Boolean True or false.

Syntax

  Status of last subelement? element-qualifier* (is | isnt) (proper | inclusion)

This operator determines why an element was allowed in a document. If the specified element doesn't exist, the test fails.

If the status of the specified element is:

• proper, the element indicated by the element-qualifiers is either the document element or a proper sub-element.
• inclusion, the element has been permitted by an inclusion exception.

If the of last subelement phrase is included, then the test is performed on the last sub-element of the specified element. Otherwise, the test is performed on the specified element itself.

If the specified element does not exsist, the test fails. This is not an error.