A Selector that matches a string in the parameters object passed to it.
<map:selector name="parameter" factory="org.apache.cocoon.selection.ParameterSelector"/>
<map:select type="parameter">
<map:parameter name="parameter-selector-test" value="{mySitemapParameter}"/>
<map:when test="myParameterValue">
<!-- executes iff {mySitemapParameter} == "myParameterValue" -->
<map:transform src="stylesheets/page/uk.xsl"/>
</map:when>
<map:otherwise>
<map:transform src="stylesheets/page/us.xsl"/>
</map:otherwise>
</map:select>The purpose of this selector is to allow an action to set parameters and to be able to select between different pipeline configurations depending on those parameters. - from the ParameterSelector source comments