Specified that inclusion of hash attribute is required and removed default value of sha-1; mentioned pre-image attack and added reference to RFC 4270; clarified meaning and construction of caps node attribute and disco node attribute; specified that node attribute shall be included in disco#info request for backwards-compatibility; further specified security considerations; clarified handling of the legacy format to assist developers; defined optional v attribute for the software version; added service discovery feature for caps optimization to prevent confusion regarding server support of caps vs. caps optimization.
Specified that inclusion of hash attribute is required, removed default value of sha-1, and added reference to IANA registry; mentioned pre-image attack and added reference to RFC 4270; clarified meaning and construction of caps node attribute and disco node attribute; specified that node attribute shall be included in disco#info request for backwards-compatibility; further specified security considerations; clarified handling of the legacy format to assist developers; defined optional v attribute for the software version; added service discovery feature for caps optimization to prevent confusion regarding server support of caps vs. caps optimization.