uid

UID

"uid" is an hCard property. See also hCard examples for canonical profile URLs.

This page documents an effort to define a microformat for identifiers. This effort came about from two angles:

• the need for a module that hCard and hCalendar could reference for defining the behavior of UID
• the need for marking up freeform identifiers that are found in web content

Per the microformats process

• uid-examples
• uid-formats
• uid-brainstorming

Please take a look, and contribute your thoughts and ideas.

RFC 2426

Section 3.6.7 of RFC 2426 (on which hCard is based) says:

The [UID] can include the type parameter "TYPE" to specify the format of the identifier. The TYPE parameter value should be an IANA registered identifier format. The value can also be a non-standard format.

A search of the IANA website finds no occurrences of "identifier format".