Purpose The tag algorithm lets people mint — create — identifiers that no one else using the same algorithm could ever mint. It is simple enough to do in your head, and the resulting identifiers can be easy to read, write, and remember. The identifiers conform to the URI (URL) Syntax. Status 2005-10-26: The 'tag' URI scheme has been published as RFC 4151. To do: Compatibility with RFC 2822 email a