Search Concepts
The purpose of full-text searching is to identify data sources, such as documents, that contain a specified search term. The search engine must quickly and accurately provide results to the user. It must handle a variety of file formats and storage locations. Finally, the search results should be sorted in a way to make the most useful documents most visible to the user.
We can differentiate between two large categories of searches: search against a well-defined source using SQL-type language and fuzzy search against weakly structured data sources like files, images, web sites, and so on. SQL Server, for example, employs both approaches through SQL queries (for example, SELECT FirstName, LastName FROM tblPeople WHERE LastName ...
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