Physical location information
Physical addresses should be aligned with desired usage (i.e., various deliveries may not be possible to PO boxes). Full postal designation (with country) for mail and delivery services may require a street address. In addition, links to appropriate maps may be useful.
To facilitate indexing by physical location35, a well-engineered Web page may include the RMfields … …, and for addresses specifying a street location, the RMfield . Cross street can be useful for fine-tuning in human navigation and for fine-tuning in mapping software. Any Web site offering or effecting commercial transactions shall prominently display postal addresses and telephone numbers for follow-up inquiries
Server technology independence
Depending on the target audience and the desired sophistication of the pages, a well-engineered Web page may or may not make use of server side capabilities such as server side include (SSI), active server page (ASP), or other capabilities. It is desirable, whenever possible, to produce pages that do not depend on server settings or capabilities. Two recommendations in this area include the following:
a) Avoid links to a directory in a relative reference. Instead point to the file within the directory. For example should be . The “default file” may vary from server to server, pages that reference directories may not be portable from one server to another.
b) Whenever important elements such as navigation elements are provided through server support, also provide these navigation controls directly, perhaps through a text menu at the bottom of the page. Because more server code is treated as comments by browsers, these pages will be usable across a wide range of servers even though their appearance may change. The ultimate goal is to allow pages, whenever possible, to be moved from server to server, and even be moved onto CD-ROM for distribution without suffering from broken links.
Flushing search engines
Search engines may store part or all of indexed pages and may present this back as part of the search results. Use of the “description” meta tag provides a level of control over what is presented. However, the initial content of a Web page may be presented. This can continue to be available either via the index, or via caching that the search engine has done, even after the page has been removed from the site. The information incorporated in the “description,” and early in the page should take this into account. Note that corrected or deleted material may continue to be available. Resubmission to search engines may facilitate replacement of these references. Search engines should flush old page indexing information within one year, or as of the “expiration date” of the page.