[retroflexzy]

I once attempted to use XSLT to transform SOAP requests generated by our system so the providers' implementation would accept them. This included having to sufficiently grok XSD, WSDL el at to figure out what part of the chain is broken.

At the end of the (very long) process, I just hard-coded the reference request XML given by the particularly problematic endpoints, put some regex replacements behind it, and called it a day.