link

lien avec un média indépendant.

déclaration dans la partie <head>.

exemple :

B.4 Notes on helping search engines index your Web site
This section provides some simple suggestions that will make your documents more accessible to search engines.

Define the document language
In the global context of the Web it is important to know which human language a page was written in. This is discussed in the section on language information.
Specify language variants of this document
If you have prepared translations of this document into other languages, you should use the LINK element to reference these. This allows an indexing engine to offer users search results in the user's preferred language, regardless of how the query was written. For instance, the following links offer French and German alternatives to a search engine:

Provide keywords and descriptions
Some indexing engines look for META elements that define a comma-separated list of keywords/phrases, or that give a short description. Search engines may present these keywords as the result of a search. The value of the name attribute sought by a search engine is not defined by this specification. Consider these examples,

Indicate the beginning of a collection
Collections of word processing documents or presentations are frequently translated into collections of HTML documents. It is helpful for search results to reference the beginning of the collection in addition to the page hit by the search. You may help search engines by using the LINK element with rel="start" along with the title attribute, as in: