Try xslt and review sample code

try xslt and review sample code
aisvg.xslt

http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/view/head:/share/extensions/aisvg.inx
http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/view/head:/share/extensions/aisvg.xslt

can convert kml to svg similar with aisvg.xslt

It may be easier with python

Understanding the logic behind the conversion using xslt
http://en.wikipedia.org/wiki/XSLT

xslt recognizes the pieces of a XML and output a text, and that may be other XML

need to recognize a direct translation between both that cam be made easily...