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Web indexing, orInternet indexing, comprises methods for indexing the contents of awebsite or of theInternet as a whole. Individual websites orintranets may use aback-of-the-book index, whilesearch engines usually use keywords andmetadata to provide a more useful vocabulary for Internet or onsite searching. With the increase in the number ofperiodicals that have articles online, web indexing is also becoming important for periodical websites.[1]
Back-of-the-book-style web indexes may be called "web site A-Z indexes".[2] The implication with "A-Z" is that there is an alphabetical browse view or interface. This interface differs from that of a browse through layers of hierarchical categories (also known as ataxonomy) which are not necessarily alphabetical, but are also found on some web sites. Although an A-Z index could be used to index multiple sites, rather than the multiple pages of a single site, this is unusual.
Metadata web indexing involves assigning keywords, description or phrases to web pages or web sites within ametadata tag (or "meta-tag") field, so that the web page or web site can be retrieved with a list. This method is commonly used bysearch engine indexing.[3]
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