Dave Winer: RFC: MetaWeblog API. "At the beginning of this week I thought we'd do a little work and teach Radio 8 how to do titles and links in weblog posts. One thing led to another and now it's time to broaden the XML-RPC pipe that tools use to connect to Radio, and in doing so offer an evolution to the art of scripting weblog tools."
"The Blogger API is too narrow to carry the new data. People who develop tools said let's have more. I gave it some thought and decided yes, let's do that."
"[Metadata:] A totally over-used term, but that's what's going on here. This API views a post as a package of metadata with some well-known names and room to grow on an organized or an ad hoc basis. In my experience those are the kinds of APIs that have legs. They go somewhere."
"So let's call this the MetaWeblog API."
Here's a whole big discussion about it. The wasabii project came up, as it's another attempt to make XML-RPC and SOAP weblog APIs. I'll have to look at it in more detail. If I ever write anything like this into my weblog, I'll probably design my own spec that fits my weblog, and map anything else I want to on top of that. And then I'll program an app using PHP-GTK to write to it 
Update, more on the MetaWeblog API. There have been some changes made to the API, and Evan Williams, author of the Blogger API, comments on the API. Let's hope Dave and Evan work together to come up with a unified "version 2" of the Blogger API. It'll be better for everybody.
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