XRDS-Simple was an early attempt to simplify the XRDS schema for OAuth Discovery. The XRDS-Simple profile removed many of the complex elements in XRDS and defined new parser behavior to make client development easier. However, after a few attempts it became clear that the underlying architecture was incorrect. Instead, the XRI TC which authored XRDS decided to produce a new specification called XRD 1.0.
XRD 1.0 replaces XRDS-Simple and delivers a truly simple resource descriptor format. It is closely aligned with web linking as used in HTML and ATOM, and includes support for only the most common features.
For a history of XRDS-Simple visit the mailing list archive (no longer active).
Specification Draft
XRDS-Simple 1.0 Draft 1 (obsolete)
Articles
Announcing XRDS-Simple 1.0 Draft 1
