XRDS [SEP] based on
XRDS
XRDS (eXtensible Resource Descriptor Sequence) is an XML format for discovery of metadata about a web resource – in particular discovery of services associated with the resource, a process known as service discovery. For example, a website offering OpenID login can resolve a user's OpenID identifier to an XRDS document to discover the location of the user's OpenID service provider.
Background.
The XML format used by XRDS was originally developed in 2004 by the OASIS XRI (extensible resource identifier) Technical Committee as the resolution format
called codice_1,
2. By an equivalent entry in the HTML HEAD section, calledbrcodice_2, or
3. By requesting a special mime type called codice_3 when performing an HTTP GET on the identity URL.
Developers can choose which of the alternatives to implement, based on factors such as whether they can run software at the identity URL or not.
XRDS documents.
Here is an example XRDS capability document:
If this XRDS document was returned, using one of the listed mechanisms, for a URL,