!!! Overview
[{$pagename}] ([iss]) is generally the [{$pagename}] of the item.

!! [U-Prove]
The [Authoritative] source is referred to as the Issuer

!! OAuth 2.0
In authorization responses to the client, including error responses, an authorization server supporting this specification [MUST] indicate its identity by including the __iss__ parameter in the response.

[OAuth Clients] that support this specification [MUST] extract the value of the __iss__ parameter from [Authorization Response] they receive if the parameter is present. [OAuth Clients] [MUST] then decode the value from its "application/x-www-form-urlencoded" form according to Appendix B of [RFC 6749] and compare the result to the issuer identifier of the [Authorization Server] where the [Authorization Request] was sent to.

The [OAuth 2.0 Authorization Server Metadata] [SHOULD] contain the [authorization_response_iss_parameter_supported] [Boolean] parameter indicating whether the authorization server provides the iss parameter in the [Authorization Response].!! [Openid-configuration] [URL]
[{$pagename}] is a __OPTIONAL__ [Openid-configuration] [URL] using the [HTTPS] scheme with no query or fragment component that the [OpenID Connect] [Identity Provider (IDP)] asserts as its Issuer Identifier. 

If [{$pagename}] discovery is supported, this value [MUST] be identical to the [{$pagename}] value returned by [WebFinger]. This also [MUST] be identical to the [iss] [JWT Claim Value] in [Identity Token] issued from this [{$pagename}].

!! [Certificate Issuer]
[{$pagename}] within [X.509] [Certificates] is referred to as the [Certificate Issuer]

!! [Verifiable Claims]
[{$pagename}] is an [entity] that creates a [Verifiable Claim], associates it with a particular [subject], and transmits it to a [holder]. 

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]