.. _in-scope-prefixes:

=================
in-scope-prefixes
================= 

The prefixes that are in scope for an element

Description
~~~~~~~~~~~
The fn:in-scope-prefixes function returns a sequence of prefixes (as strings) 
that are used in the in-scope namespaces for the $element element. The results 
include a zero-length string if there is a default namespace declaration. It 
also always includes the xml prefix, which is built into the XML recommendation.

Note that the function uses in-scope namespaces, as opposed to statically known 
namespaces. For example, it does not necessarily include all the prefixes 
declared in the prolog, if they are not used by $element or one of its 
ancestors. .

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   * - **Parameters**
     - **Description**
   * - element:element()
     - 

Examples
~~~~~~~~
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   * - **XPath**
     - **Results**
   * - in-scope-prefixes($in-xml)
     - ('', 'prod2', 'xml')

See Also
~~~~~~~~

.. toctree::
   :titlesonly:
   :glob:

* :ref:`functx_namespaces-in-use`.
* :ref:`namespace-uri-for-prefi`.