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Introduction
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Document Structure Overview XML declaration (prolog) Document type declaration Root element (namespace) Document header Document body
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Document Structure <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> Document Title Content of document...
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XML Prolog Optional Specifies XML version Declares type of character encoding Problem: IE/Windows browser can not interpret prolog site not displayed correctly Solution: specify character encoding in
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Document Structure (for IE) <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> Document Title Content of document...
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DOCTYPE and Namespace Tell browsers how to interpret document Tell validations services how to test for conformance
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DOCTYPE Allows designers/developers to author several different types of documents, each bound by different rules Rules: XHTML 1.0 specifications, called document type definition (DTD) XHTML 1.0 offers 3 DTDs: Transitional Strict Frameset
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DOCTYPE declaration Top of every XHTML document, before any code or markup After XML prolog
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XHTML1 Transitional Closest to HTML Can work with Presentational markup structures Deprecated elements Deprecated attributes Used for converting existing web sites
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XHTML1 Frameset Used for documents that contain a element Same elements as Transitional plus Frameset Frame noframe
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XHTML1 Strict Excludes all deprecated elements and attributes New web site development What we use in class
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Which Standard? XHTML 1.0 Transitional Conversion of existing HTML 4.01 sites XHTML 1.0 Frames Conversion of existing HTML 4.01 sites that contain frames XHTML 1.0 Strict New development Use of style sheets XHTML 1.1 Currently lack of browser support XHMTL 2.0 Under development use in class
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Root Element (XML NameSpace) Collection of XML element types and attribute names associated with a specific DTD Version of XML = english Document in english
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Document Header Information about the document that is not considered part of the document content Info for users Info for browsers Info for search engines Must include title Displayed in the top bar of the browser Bookmark or favorites list Key tool for accessibility Search engines
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Document Body … Required element Contains all elements of normal document flow
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