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Post #1550

Re: [videoblogging] MT-RelEnclosures

By Andreas Haugstrup | "Andreas Haugstrup" <videoblog@...> | andreashaugstrup
October 28, 2004 | Post #1550 | Topic #1534

On Thu, 28 Oct 2004 11:10:36 -0400, Joshua Kinberg <jkinberg@...> wrote: > So, an author should be able to add multiple enclosures per blog > entry? For instance, I may have a video marked as an enclosure, and an > "alternate" video in a different language format (let's say, Spanish). > Both of these would be enclosures? So, an aggregator would download > both files... The difference between a rel="enclosure" and a rel="alternate" might seem insignificant at first, but the difference is huge. With alternate you are describing alternate content for the document. The alternate version can be shown without showing the original content. For example when Mica puts up a post like this one <URL:http://publicaddress.typepad.com/hello/2004/10/lets_go_bowling.html&gt; the video functions as an alternate version of the HTML post (more appropriately the HTML should be an enclosure of the video, but let's do one step at the time). With rel="enclosure" the links points to additional content. Thus the enclosure shouldn't be shown without the context of the original HTML content. It makes a huge difference because an alternate version can be added to for example a WebJay playlist or a video comment playlist because it can be shown without the context of the original post. Elements that have rel="enclosure" should not be added to eg. a video comment playlist (because it shouldn't be shown without the context of the original HTML). > Unfortunately, <enclosure> doesn't specify a format to mark alternate > versions. It also doesn't specify that more than one enclosure can be > used per <item>, but it also doesn't say that you can't... RSS isn't known for it's well-written specs. :o) The way <enclosure> is handled right now (ie. how podcasts are distributed) is that <enclosure> is used for alternate versions as well as rel="enclosure" (as I've defined rel="enclosure"). > I could add support for "alternate" and "appendix", but it might make > things more confusing for the user, or the aggregator. "Alternate" is a valuable distinction from "enclosure" (again, as I've defined it). Appendix was more of a quick thought. I'm not sure they should be syndicated or not. You must admit that they are awfully close to enclosures though. :o) - Andreas -- <URL:http://www.solitude.dk/&gt; Commentary on media, communication, culture and technology.