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== Components ==
Searching for textual content in [[databases]] or [[structured data]] formats (such as [[XML]] and [[Comma-separated values|CSV]]) presents special challenges and opportunities which specialized search engines resolve. [[Databases]] allow logical queries such as the use of multi-field [[Boolean logic]], while full-text searches do not. "Crawling" (a human by-eye search) is not necessary to find information stored in a database because the data is already structured. [[index (
Database search engines are usually included with major database software products.
== Applications ==
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