[xwiki-devs] Characterizing "static" resources

Hello XWiki friends, Considering files as being "static resources" within an installation has the big advantage that it can be left to a serving infrastructure that can honour all the optimized change management the web has prepared for us (If-Modified-Since, caching at several levels, pre- allocations thanks to Content-Length...). I had done it for http://i2geo.net/, basically by guessing, and the result was amazing, a huge speed-up perception factor. But now... I need to redo this for our curriki instance. How could I recognize a file as being subject of static serving? - a picture file (pretty clear) - a css or javascript that does not contain either a groovy or velocity mark? There are many examples of the second sort, e.g. all the gwt output files, but I would like to be sure of them: - is groovy-inside CSS or JavaScript ever done? (I've never seen it) - what are "all the marks" of velocity? ( would \#[a-z]+ and \$[a-z]+ be regexps that would suffice?) thanks in advance paul