There are 2 repositories under did-wg topic.
W3C Decentralized Identifier Specification v1.0
DID Spec Registry (Note)
Specs and documentation for all DID-related /.well-known resources
Decentralized Identifier Use Cases and Requirements v1.0
W3C DID Test Suite and Implementation Report
Home page of the Decentralized Identifier Working Group
DID Implementation Guide (Note)
W3C Decentralized Characteristics Rubric v1.0
WG Note on DID CBOR Representation