.. _functx_scheme-from-uri:

======================
functx:scheme-from-uri
====================== 

Returns the scheme from a URI

Description
~~~~~~~~~~~
The functx:scheme-from-uri function returns the scheme part of a URI, for 
example http or ftp, which appears before the colon. If there is no scheme 
(because it is a relative URI), a zero-length string is returned.

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   * - **Parameters**
     - **Description**
   * - uri:string()
     - the URI

Examples
~~~~~~~~
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   * - **XPath**
     - **Results**
   * - functx:scheme-from-uri('http://www.datypic.com')
     - http
   * - functx:scheme-from-uri('ftp://ftp.datypic.com')
     - ftp
   * - functx:scheme-from-uri('ftp.datypic.com')
     - zero-length string
   * - functx:scheme-from-uri('www.datypic.com')
     - zero-length string
   * - functx:scheme-from-uri('prod.html')
     - zero-length string

See Also
~~~~~~~~

.. toctree::
   :titlesonly:
   :glob:

* :ref:`functx_is-absolute-uri`.
* :ref:`functx_fragment-from-uri`.