severity 615125 important unmerge 615125 662091 owner 555118 nicholas@periapt.co.uk thanks Samuel, I have come to the conclusion that you advice was boadly good but does not solve your issue with nsgmls. For that I have to *probably* take over w3c-dtd-xhtml, make it depend on w3c-sgml-lib and strip out anything that conflicts with w3c-sgml-lib. However with that I am hitting issues.