Chapter 13. Tables
HTML tags for creating tables were originally developed for presenting rows and columns of tabular data, but designers quickly co-opted them as a valuable tool for controlling the layout of web pages. Tables allow you to create columns of text, hold white space between elements, and restrict the dimensions of the page’s content in ways other HTML formatting tags can’t.
The HTML 4.01 specification on tables is a great deal more complex than the previous 3.2 standard. It makes an effort to bring context and structure to table data as well as to provide systems for incremental display during download and display on nonvisual display agents (such as speech- and Braille-based browsers). To read what the HTML 4.01 specification has to say about tables, see the W3C’s site at http://www.w3c.org/TR/html4/struct/tables.html.
Summary of Table Tags
In this section, browser support for each tag is noted to the right of the tag name. Browsers that do not support the tag are grayed out. Tag usage is indicated below the tag name. Start and end tags are required unless otherwise noted. “Deprecated” means that the tag or attribute is currently supported but is due to be phased out of the HTML specification and is discouraged from use (usually in favor of similar style sheet controls). The attributes listed for each tag reflect those in common use. A more thorough listing of attributes for each tag, according to the HTML 4.01 specification, appears in Appendix A.
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