[basex-talk] REST service : How to run server side query with params?

Hello,   I understand that one way to run a rest based XQuery with parameters is to use the following ...   http://localhost:8984/rest/DB/mult.xq?a=21&b=2   This is possible if the query is in the BaseX database.    I need to use REST, but the query file (.xq) and .xqm, .xsl files need to be located on the server but not in the database.   Can someone give me a pointer about how to do that? Thanks, Anupam