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meta element

meta element in Technology
World-Wide Web
An element, with tag name of "META", expressing meta-data about a given HTML document. HTML standards do not require that documents have META elements; but if META elements occur, they must be inside the document's HEAD element.
The META element can be used to identify properties of a document (e.g., author, expiration date, a list of key words, etc.) and assign values to those properties, typically by specifying a NAME attribute (to name the property) and a CONTENT attribute (to assign a value for that property). The HTML 4 specification doesn't standardise particular NAME properties or CONTENT values; but it is conventional to use a "Description" property to convey a short summary of the document, and a "Keywords" property to provide a list of keywords relevant to the document, as in:
META NAME="Keywords" CONTENT="kumquat, Fortunella"
META elements with HTTP-EQUIV and CONTENT attributes can simulate the effect of HTTP header lines, as in: META HTTP-EQUIV="Expires" CONTENT="Tue, 22 Mar 2000 16:18:35 GMT"
Other properties may be application-specific. For example, the Robots Exclusion ( standard uses the "robots" property for asserting that the given document should not be indexed by robots, nor should links in it be followed: META NAME="robots" CONTENT="noindex,follow"

The Free On-line Dictionary of Computing, © Denis Howe 2010
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