!!! Overview
[{$pagename}] ([ID]) ([string], [token], [key], [Attribute], [Identity Attributes] that __uniquely__ provides [Identification] of either a __uniquely__ "[Entity]" or class may be an idea, __physical__ [Entity] (or class thereof), or physical substance (or class thereof) [context] (globally or locally within a specific [domain], community, [Directory Service], [application], etc.


An [{$pagename}] is used to separate an [Entity] from the [Anonymity Set]

An [{$pagename}] may be a [Name Form], word, number, letter, symbol, or any combination of those.

[{$pagename}]s are labels which refer to [entities]. They are used to keep track of what we know about those [entities]. [1]

!! [{$pagename}] [Classification]
[{$pagename}] are the key used by the parties to an identification [relationship] to agree on the entity being represented. Identifiers may be [classified|Classification] as:
* [Metadata]
* [Indirect Identifier]
* [Identity Attribute]
* [Omnidirectional identifier]
* [Unidirectional identifier]
** [Pairwise Pseudonymous Identifier] ([PIID])
** [Sector Identifier]

!! [UserIds] and [Unique Identifiers]
[UserIds] and [Unique Identifiers] as [{$applicationname}] use them are [{$pagename}]s

!! [RFC 6973] Section 3.3 
[RFC 6973] Section 3.3 defines [{$pagename}] as a [data] object __uniquely referring to a specific [identity|Digital Identity]__ of a [protocol] [entity] or individual in some [context].  See [RFC 4949].  

[Identifiers] can be based upon any [Name Form] [Official Names], [Personal Names], and/or [nicknames] or can be artificial (for example, x9z32vb).  However, identifiers are by definition __unique within their [context]__ of use, while natural names are often __NOT a [unique Identifier]__.

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
----
* [#1] - [A Primer on Functional Identity|https://github.com/WebOfTrustInfo/rebooting-the-web-of-trust-fall2017/blob/master/topics-and-advance-readings/functional-identity-primer.md|target='_blank'] - based on information obtained 2017-10-15-