lyberty.com | eclectic content This page created: 2006-11g-10  |   Content last updated: 2006-11g-10   |   Author: Lyberty   

About Meta Navigation (relationship, or "rel" tags)

An image showing the relationship nav bar in the Opera browser.

tags are 'link rel="navigation-title" href="location of item"

e.g. <link    rel="help"   href="http://www.opera.com/support/"   />

Relationship values can be used in principle:

a) for document specific toolbars/menus when used
with the link element in document head e.g.
start, contents, previous, next, index, end, help
b) to link to a separate style sheet (rel="stylesheet")
c) to make a link to a script (rel="script")
d) by stylesheets to control how collections of
html nodes are rendered into printed documents
e) to make a link to a printable version of this document
e.g. a PostScript or PDF version (rel="alternate" media="print")


<title>Opera Software - Knowledge Base</title>
<meta name="keywords" content="" />
<meta name="description" content="" />
<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />
<link rel="home" href="http://www.opera.com/" title="Opera front page" />
<link rel="help" href="http://www.opera.com/support/" />

HTML 4.0:
When REL=NEXT, the target document is the next document in a sequence the author suggests the reader will find useful.
When REL=PREVIOUS, the target document is the previous document in a sequence the author suggests the reader will find useful. This is the inverse relationship to REL=NEXT, i.e. REV=NEXT states the same thing as REL=PREVIOUS, similarly, REV=PREVIOUS states the same thing as REL=NEXT.
When REL=CONTENTS, the target is a table of contents that includes the current document.
When REL=INDEX, the target document acts as an index covering the current document.
When REL=NAVIGATE, the target document contains information such as a image map that will help users to gain a sense of how and where to found information.
When REL=COLLECTION, the target document is an COLLECTION that contains the current document.

When REV=COLLECTION, the current document is a COLLECTION for the referenced document or object.

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XHTML ( DTD XHTML 1.0 Strict)

The "REL" (relational) concept was carried over to XHTML; started being applied to tags instead of just headers. For example:

<a href="http://www.w3.org/TR/2002/WD-xhtml2-20021211/abstraction.html#dt_LinkTypes" title="XHTML Link Types" rel="Glossary">XHTML Link Types</a>

Authors may use the following recognized link types, listed here with their conventional interpretations. A LinkTypes value refers to a space-separated list of link types. White space characters are not permitted within link types.

These link types are case-insensitive, i.e., "Alternate" has the same meaning as "alternate".

User agents, search engines, etc. may interpret these link types in a variety of ways. For example, user agents may provide access to linked documents through a navigation bar.
Designates substitute versions for the document in which the link occurs. When used together with the hreflang attribute, it implies a translated version of the document. When used together with the media attribute, it implies a version designed for a different medium (or media).
Refers to an external style sheet. See the Style Sheet Module for details. This is used together with the link type "Alternate" for user-selectable alternate style sheets.
Refers to the first document in a collection of documents. This link type tells search engines which document is considered by the author to be the starting point of the collection.
Refers to the next document in an ordered sequence of documents. User agents may choose to pre-load the "next" document, to reduce the perceived load time.
Refers to the previous document in an ordered series of documents. Some user agents also support the synonym "Previous".
Refers to the parent document in a structured set of documents.
Refers to a document serving as a table of contents. Some user agents also support the synonym ToC (from "Table of Contents").
Refers to a document providing an index for the current document.
Refers to a document providing a glossary of terms that pertain to the current document.
Refers to a copyright statement for the current document.
Refers to a document serving as a chapter in a collection of documents.
Refers to a document serving as a section in a collection of documents.
Refers to a document serving as a subsection in a collection of documents.
Refers to a document serving as an appendix in a collection of documents.
Refers to a document offering help (more information, links to other sources information, etc.)
Refers to a bookmark. A bookmark is a link to a key entry point within an extended document.
The title attribute may be used, for example, to label the bookmark. Note that several bookmarks may be defined in each document.
Refers to a document that provides metadata, for instance in RDF, about the current document.
Refers to a P3P Policy Reference File. See [P3P]

Linktype 'required'
Linktype 'required'
Linktype 'prefetch'



When a property specified by a meta element takes a value that is a URI, some authors prefer to specify the meta data via the link element. Thus, the following meta data declaration:
<meta name="DC.identifier">http://www.rfc-editor.org/rfc/rfc3236.txt</meta>

might also be written:
<link rel="DC.identifier"

Addtional Info:
The HTML 4.01 Specification [http://www.w3.org/TR/1999/REC-html401-19991224]
Latest version of HTML 4.01 [http://www.w3.org/TR/html401]