Open Source Search Engine [closed]

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I'm learning search technology and reading the paper about Google prototype.

Is there an open source search engine written in C++ that is easy to read?

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Lucene is probably the first place to look.

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Xapian is a popular open-source search engine written in C++

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here is port for the Lucene search engine in Perl, which will give you access to the c++ API

with tutorial

Lucene

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clucene

Since i know nothing about java,I found clucene, it's a c++ port of lucene.