Is there an open-source library that can be used to search?
Metadata is the Open Archive Initiative Protocol for Harvest that uses HTML on XML. You can find it here:
Apart from this, deep web (also called the DeepNet, invisible web, dark web or hidden web) refers to the World Wide Web content, the surface of the web Not part of indexed by standard search engines.
Commercial search engines have started looking for alternate methods to crawl deeper web. Sitemap protocols (previously developed by Google) and Mod OE systems allow search engines and other interested parties to search deep web resources on particular web servers. Both systems allow web servers to advertise URLs that are accessible on them, allowing automatic search of resources which are not directly connected to the web. Google's deep web surfing system prepares presentations for each HTML form and combines the resultant HTML pages into the Google search engine index. Results of front results for one thousand queries per second for deep web content In this system, submission is pre-computed using three algorithms:
(1) Accepting Keywords Select input values for text search input,
(2) Identify the information only for a specific type of value (e.g., date), and
(3) less input By selecting combinations, the web search index Switch to generates the appropriate URL for inclusion.
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