Specify filename extensions for the different CL dialects #43
Description
In relation to #38 (MIME types for CL dialects) it may also be useful to recommend (rather than prescribe) filename extensions for the CL dialects, e.g. .clif for CLIF.
Once more let's see how this is done for OWL: http://www.w3.org/TR/owl2-xml-serialization/#Appendix:_Internet_Media_Type.2C_File_Extension.2C_and_Macintosh_File_Type