File extension true 'File extension' concept property ('file_extension' metadata tag) lists examples of usual file extensions of formats. N.B.: File extensions that are not correspondigly defined at http://filext.com are recorded in EDAM only if not in conflict with http://filext.com, and/or unique and usual within life-science computing. Separated by bar ('|'), without a dot ('.') prefix, preferably not all capital characters.