I've now written some XSLT to convert all @sameAs to @corresp in the <m> element, and also to prefix all such values (along with those already in @corresp by virtue of being multiple) with the m: prefix (our planned private URI scheme for morpheme pointers). I've also written updates to XQuery and XSLT to take account of this, currently commented out, and I'm going to be testing everything locally tomorrow and fixing before I upload to the live db. Everything has to change at once before it will work. I also have to update documentation.