home The link which has rel="home" attribute references a home page or the top of some hierarchy. http://www.w3.org/MarkUp/html3/dochead.html parent The PARENT relationship identifies the superior or container node. http://www.w3.org/MarkUp/draft-ietf-html-relrev-00.txt definition The DEFINITION relationship identifies a definition of a term. http://www.w3.org/MarkUp/draft-ietf-html-relrev-00.txt footnote The FOOTNOTE relationship identifies a footnote. http://www.w3.org/MarkUp/draft-ietf-html-relrev-00.txt search The link which has rel="search" references a page for searching material related to a collection of pages. http://www.w3.org/TR/REC-html32.html#link editor The EDITOR relationship identifies a hypertext link to an editor. Usage is expected to be similar to that of the AUTHOR hypertext link. http://www.w3.org/MarkUp/draft-ietf-html-relrev-00.txt author The AUTHOR relationship identifies a hypertext link to an author. http://www.w3.org/MarkUp/draft-ietf-html-relrev-00.txt meta The META relationship identifies a hypertext link to a node which contains meta-information related to the current document. This is intended to be a generalized meta-data relationship descriptor. http://www.w3.org/MarkUp/draft-ietf-html-relrev-00.txt sitemap The sitemap relationship identifies a hypertext link to a site map. contact The contact relationship identifies a hypertext link to a web page which provide some methods to contact it's author.