This technique relates to the following sections of the guidelines:
Providing a search engine to help users find content
The search engine is an important part of a design strategy that offers users different ways to find the content they are interested in. For example, the search engine can help users find specific words or phrases that do not appear in navigation bars or in the page titles listed in the site map.
In order for the search engine to provide an effective navigation mechanism, the site must has keywords, META tags, and an accessible navigation structure, including informative page titles and section headings. In other words, techniques that are used to optimize search engine results for external searches also support internal search engines and aid accessibility in other ways.
The search form itself must be accessible.
General Techniques
HTML Techniques
Editorial Note: We may need an HTML technique about META description= and META keywords= as devices to support search engine optimization; these would be related to Guideline 2.4 L2 SC1.
other resources
Netmechanics Add search to your site provides a useful overview of methods and tools for adding search capabilities to Web sites.