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Meta-crawlers aggregate and rank search results from multiple search engines without maintaining an independent index, providing fast and broad coverage. In contrast, focused crawlers specifically target and collect pages related to a defined topic using techniques like AI and keyword matching, creating a high-quality, topic-specific database. Key differences include their crawling scope, data sources, and overall purpose, with examples like Dogpile for meta-crawlers and CiteSeer for focused crawlers.

Author

aky20005060

Language

EN