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Thursday, December 4, 2008

Head Elements

Other Head Elements

In addition to the title elements under the HTML 4.01 and XHTML 1.0 transitional DTDs, the elements allowed within the head element include base, isindex, link, meta, object, script, and style. A brief discussion of the other head elements folows. Complete information available in the cross reference posts and reference sections.
The < base > tag specifies an absolute URL address that is used to provide server and directory information for partially specified URL addresses called relative links used within the document. Links and the sue of< base > are discussed in my later posts.
The tag indicates that the document contains a searchable index. It causes the browser to display a query prompt and a field for entering a query. This element typically was used with simple site searching mechanism, but is rarely used today, having been mostly replaced by forms. Under the HTML 4.01 and XHTML 1.0 strict definitions, is deprecated.
The < link > tag specifies a special relationship between the current document and another document. It can be used in hypertext navigation relationships including prefetching of documents by browsers. It can also be used to link the current document to a style sheet. The < link > tag has many interesting possibilities, but unfortunately few of these are implemented even in the most standards-complaint browser.
The < meta > tag uses name/ value pairs to provide meta-information about a document. The < meta > element often provides descriptive information targeted by Web search engines. In a very different use, the < meta > tag can define various HTTP request values such as a page refresh or an expiration time.
The tag allows programs and other binary objects to be directly embedded in a Web page. The most popular current approaches use Java applets, plug-ins, or ActiveX controls to embed multimedia elements such as Flash Animations, sounds or movies.

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