[wp-hackers] Creating new categories via the XMLRPC API

David Weitz dabbaking at gmail.com
Thu Feb 15 20:22:20 GMT 2007

In themes, you can add wp_meta() inside of the <head> and it will add it
for you.

John Keegan wrote:
> OK, I'll decloak. ;-)
>>> Make sure there is a WordPress API entry in the RSD for the site
>>> before using the new API.
>> I'm an idiot though.  What's the RSD?
> RSD stands for "Really Simple Discovery" and is a method for blogging
> clients to discover additional information about the API method to use
> to interact with a given blog... This is how you are able to tell a
> blogging tool just 3 items: a blog URL, a username, and a password, and
> it can determine which API to use (MT, Metaweblog, Blogger, WordPress,
> etc.) to communicate with your blog.
> It works like this:
> First, The blogging client parses the HTML HEAD area of a blog looking
> for the RSD link, it might look like this:
> <link rel="EditURI" type="application/rsd+xml" title="RSD" href="http://
> photomatt.net/blog/xmlrpc.php?rsd" />
> Next, the tool goes and fetches that URL, and would see something like this:
> <?xml version="1.0" encoding="utf-8"?><rsd version="1.0" xmlns="http://
> archipelago.phrasewise.com/rsd">
>   <service>
>     <engineName>WordPress</engineName>
>     <engineLink>http://wordpress.org/</engineLink>
>     <homePageLink>http://photomatt.net</homePageLink>
>     <apis>
>       <api name="WordPress" blogID="1" preferred="false" apiLink="http://
> photomatt.net/xmlrpc.php" />
>       <api name="Movable Type" blogID="1" preferred="true"
> apiLink="http://photomatt.net/xmlrpc.php" />
>       <api name="MetaWeblog" blogID="1" preferred="false"
> apiLink="http://photomatt.net/xmlrpc.php" />
>       <api name="Blogger" blogID="1" preferred="false" apiLink="http://
> photomatt.net/xmlrpc.php" />
>     </apis>
>   </service>
> </rsd>
> This bit of HTML tells the client that it can speak 4 APIs, but prefers
> the Movable Type API and tells the tool where the XML-RPC URL is and
> what the Blog ID number of this blog is (required to interact with the
> blog via the API).
> The whole process saves end users considerable setup time, they don't
> need to know their API endpoint or their Blog ID or even what kind of
> API their blog uses.
> So to get back to the "Make sure there is a WordPress API entry in the
> RSD for the site" statement, if there is no entry in the RSD file, then
> blogging clients and tools would assume that your blog does not support
> the use of the WordPress API. Clients would not be able to "discover"
> that the Wordpress API was supported on your blog.

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