serverlooki.blogg.se - Apache lucene

#Apache lucene for free#

The Lucene indexing process takes care to identify (or process) fields and index them.

Field contains Terms and are simply sets of tokens of information.

The entire set of Documents is called the Corpus. The Lucene indexing process adds multiple documents to an Index. It is more like saying that “Employee Name” – “Sumith Puri” | “Employee Designation” – “Software Architect” | “Employee Age” – “33” | “Employee ID” – “067X” forms a document. Document is a collection of Fields and the Values against each of the Fields.Usually, Index is also accompanied by compression, check-sum, hash or location of the remaining data.

Index is a handle (information) that can be used to get related information from a file, database or any other source of data.

If we were to visualize this in terms of an index, it would be inverted, as we would be using the term as a handle to retrieve id or locations – the reverse of the popular usage of an index.

Inverted Index is used to get traversed from the string or search term to the document ids or locations of these terms.

#Apache lucene for free#

It’s an open source project available for free download, a cross-platform solution that offers scalable, high-performance indexing and powerful, accurate and efficient search algorithms. It is a technology suitable for nearly any application that requires full-text search, especially cross-platform. Apache Lucene introductionĪpache Lucene is a high-performance, full-featured text search engine library written entirely in Java. The most important aspects of Lucene are mentioned under each heading. We’ll start with Apache Lucene 5.3.x/5.4.y. This will also help you clarify a few terms before getting into search or information retrieval: Before we delve into Apache Lucene, the following are the most important terms that you need to be familiar with.