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It is possible to extend the parameter types that Joomla can support beyond the standard types available in a default installation.  To understand how to do this, first look at how the standard types are implemented.

===Location of standard parameter types code===
{{Chunk:Location of standard parameter types code}}

===Starting a new custom parameter type===
{{Chunk:Starting a new custom parameter type}}

The new parameter type will most likely be associated with a particular extension, in which case you will want to bundle the code for the parameter type with the code for the extension.

Where you put this file is somewhat flexible and depends to some degree on the type of extension you are developing.  For templates it is recommended that you place it here

<tt>path-to-Joomla]/templates/[template-name]/elements/newparm.php</tt>

===Changes to the XML file for custom parameter types===
{{Chunk:Changes to the XML file for custom parameter types}}

For example, this would be a typical ''<nowiki><params></nowiki>'' element in a ''templeDetails.xml'' file:
<source lang="xml">
<params addpath=”[path-Joomla]/templates/mytemplate/elements”>
    <param type=”newparm” name=”setting1” default=”12” />
    <param type=”text” name=”setting2” value=”Some text” />
</params>
</source>

===Coding a custom parameter type===
{{Chunk:Coding a custom parameter type}}
[[Category:Development]][[Category:Templates]]