Change table of content HTML markup



I am new to DITA and figuring out how to change the generated table of content markup. I have written an XSL which I am able to run in lieu of map2htmltoc.xsl but the issue is that I am not able to find a hook to override the templates in this file.

Can someone help me on which feature extension to use to override the templates in this file? and what is the best way of doing something like this. Focus Areas: BPEL | DITA | ebXML | IDtrust | OpenDocument | SAML | UBL | UDDI
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