Information Retrieval (IR) is the discipline that deals with retrieval of unstructured data, especially textual documents, in response to a query or topic statement, which mayitselfbeunstructured,e.g.,asentenceorevenanotherdocument,orwhichmay be s

Lucene.Net is a high performance Information Retrieval (IR) library, also known as a search engine library. Lucene.Net contains powerful APIs for creating full text indexes and implementing advanced and precise search technologies into your programs.

Xapian是一个用C++编写的全文检索程序，他的作用类似于Java的lucene。尽管在Java世界lucene已经是标准的全文检索程序，但是C/C++世界并没有相应的工具，而Xapian则填补了这个缺憾。 Xapian的api和检索原理和lucene在很多方面都很相似，但是也有一些地方存在不同，具体请看Xapian自己的文档:http://www.xapian.org/docs/ Xapian除了提供原生的C++编程接口之外，还提供了Perl，PHP，Python和R