value-substitution in Cocoon

[Anna Afonchenko]

I have the following question: I know that in Cocoon I can use value substitution inside a pipeline, e.g. if I have a pipeline <map:pipeline>   <map:match pattern="*/*.html">     <map:generate src=""/>     <map:transform src="">       <map:parameter name="param" value="{1}"/>     </map:transform>   </map:match> </map:pipeline>   and if I write the URI http://localhost:8080/cocoon/param1/some.html   then in the pipeline the stylesheet some.xsl will receive a parameter with name param and value param1. So this is my question: Can I somehow parse/evaluate this parameter {1} inside the sitemap (not inside the xsl). E.g., can I somehow, having {1}="param1" extract the last character ("1" in this case) and send to the xsl only it, or, having parameter {1}=1, send {1}+1, i.e. 2 to the stylesheet?   I need this because I want to build pipeline that will get some parameter n, and after it is executed I want to call the same pipeline with parameter n+1. Is this possible in sitemap?   Thank you very much for help.   Anna