A (anchor)

Anchors can't be nested and always require start and end tags. They are used to define hypertext links and also to define named locations for use as targets for hypertext links, e.g.

   The way to <a href="hands-on.html">happiness</a>.

and also to define named locations for use as targets for hypertext links, e.g.

   <h2><a name=mit>545 Tech Square - Hacker's Paradise</a></h2>
name
This should be a string defining unique name for the scope of the current HTML document. NAME is used to associate a name with this part of a document for use with URLs that target a named section of a document.
href
Specifies a URL acting as a network address for the linked resource. This could be another HTML document, a PDF file or an image etc.
rel
The forward relationship also known as the "link type". It can be used to determine to how to deal with the linked resource when printing out a collection of linked resources.
rev
This defines a reverse relationship. A link from document A to document B with REV=relation expresses the same relationship as a link from B to A with REL=relation. REV=made is sometimes used to identify the document author, either the author's email address with a mailto URL, or a link to the author's home page.
title
An advisory title for the linked resource.