i'd like to open up .rdf and .xul files with the same syntax highlighting as XML. how can i do this besides selecting XML on the language selection everytime?
you have to change two files:
and add rdf and xul next to the two lines that state the xml filetype.
then compile it.
For the moment you can not yet define your extension, but its in TODO list. I'll try to implement it in the next release.