1436 Introduction to XHTML: Part 1 Appendix K (Web hosting support)
1436 Introduction to XHTML: Part 1 Appendix K Testing and Debugging Tip K.1 Use a validation service, such as the W3C HTML Validation Service, to confirm that an XHT- ML document is syntactically correct. K.5 Headers Some text in an XHTML document may be more important than some other. For example, the text in this section is considered more important than a footnote. XHTML provides six headers, called header elements, for specifying the relative importance of information. Figure K.4 demonstrates these elements (h1 through h6). Portability Tip K.1 The text size used to display each header element can vary significantly between browsers. Fig. K.3 XHTML validation results. (Courtesy of World Wide Web Consortium (W3C).)
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