typically store the anchor text embedded in the links as well, because anchor text can often provide a "very good quality" summary of a web page's content.

Database Search Engines

Searching for text-based content in databases presents a few special challenges from which a number of specialized search engines flourish. Databases can be slow when solving complex queries (with multiple logical or string matching arguments). Databases allow pseudo-logical queries which full-text searches do not use. There is no crawling necessary

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