A resolution protocol used to associate entities denoted using acct: or mailto: scheme Uniform Resource Identifiers with
subject profile information represented in a variety of structured data formats. These formats include JSON dialects such as the
Extensible Resource Description [XRD], JSON Resource Descriptors [JRD] (content-type 'application/json'), and ActivityStreams (content-type 'application/activity+json')
which is commonly used across the burgeoning Fediverse. Platforms that support this protocol provide a '.well-known/host-meta' or '.well-known/webfinger'
service endpoint for service discovery via HTTP.