(shared with permission) -------- Original Message -------- Subject: Re: RDFa and the OpenGraph Protocol Date: Mon, 11 Apr 2011 20:11:14 +0000 From: David Recordon <d...@fb.com> To: James Graham <jgra...@opera.com>, Paul Tarjan <p...@fb.com>
Hey James, adding Paul who's worked on OGP as well. We're consciously accepting the og: prefix without the xmlns declaration as we find it to be what the vast majority of implementations around the web are making use of. I don't think we have an issue with recognizing other prefixes if they use the correct namespace declaration, just guessing we haven't taken the time to implement it yet. --David On 4/11/11 12:59 PM, "James Graham" <jgra...@opera.com> wrote:
Hi, I hope you are the right person to contact about this; I found your email address on some OpenGraph Protocol slides on developers.facebook.com. The subject of the best way to incorporate RDFa inside HTML 5 has been the subject of much discussion in the HTML WG at the W3C. As a result, I examined the Facebook implementation of OpenGraph protocol and noticed that it differs from the RDFa spec in important ways. In particular the linter provided at [1] seems to recognize properties with the og: prefix whether or not there is a corresponding xmlns declaration. Also, it appears not to recognize properties with a different prefix even if they are bound to the correct URI. Is it possible for you to confirm whether these deviations from the spec are considered bugs in the Facebook implementation that you plan to fix, or deliberate design decisions? If the latter it would be really helpful if you could explain some of the thinking behind these decisions. I of course fully understand if it is not possible to share any of this information for commercial reasons. Thanks James [1] http://developers.facebook.com/tools/lint
