WebFinger

This Informational document defines the 'sip-trunking-capability'

link relation type that may be used by an enterprise telephony

Session Initiation Protocol (SIP) network to retrieve a SIP trunking

capability set document, which contains the capabilities and

configuration requirements of an Internet Telephony Service Provider

(ITSP). These technical requirements allow for seamless peering

between SIP-based enterprise telephony networks and the ITSP.

This specification defines a metadata format that an OAuth 2.0 client can use to obtain the information needed to interact with an OAuth 2.0 authorization server, including its endpoint locations and authorization server capabilities.

This specification defines the WebFinger protocol, which can be used to discover information about people or other entities on the Internet using standard HTTP methods. WebFinger discovers information for a URI that might not be usable as a locator otherwise, such as account or email URIs.