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Hey Paul - Xenu took a couple of tries as it found so many links it crashed at first, but when I told it to ignore external links, it was able to spit out not only all the broken images but also broken and redirected links, which I'd also like to fix. Thanks for the great solution!

Hi there I would mind Open Graph for users, definitely. I would mind Schema.org from the search engine aspect as all major search engines recognize it. When it comes to Dublin Core, I don't know much about it and don't read too much about it either - which tells me something. For my money, you should stick with Schema and Open Graph, again because of their wide acceptance. Hope this helps! Good luck!