Thread:Project:Support desk/Adding custom metadata to a file

Is it possible to add custom metadata fields to a file - also after the file has been uploaded? I would like to be able to e.g. add what the source for the file is, who is the copyright owner, what is the license and maybe a link to the copyrightowners website.

Is it possible to create my own custom metadata fields for a file in Mediawiki? Is there some extension that can do it?

Thanks in advance.