[Mediawiki-api] Files moved to Commons

Hi all. I am developing a set of Ruby libraries for Wikipedia/MediaWiki access: * low-level: https://github.com/molybdenum-99/mediawiktory * high-level (semantic): https://github.com/molybdenum-99/infoboxer I have a problem with understanding some files. For example, this one: https://en.wikipedia.org/wiki/File:Logo_of_the_Verkhovna_Rada_of_Ukraine.svg In UI, the page states the file is actually on commons, but the page itself exists and is accessible. In API: https://en.wikipedia.org/w/api.php?action=query&titles=File:Logo_of_the… -- it is "completely absent" like it is missing totally. In Commons API it is there OK: https://commons.wikimedia.org/w/api.php?action=query&titles=File:Logo_o… Is there a way to tell actually non-existent files from files that are included from commons, through API? Or "just check on commons, in case it is there" is the only way? Thanks in advance. V.