{{Short description|Open-source search engine}} {{refimprove|date=June 2020}}
'''Poliqarp''' is an open source search engine designed to process text corpora, among others the National Corpus of Polish created at the Institute of Computer Science, Polish Academy of Sciences.<ref>{{cite web |title=Poliqarp search engine for NKJP data |url=http://nkjp.pl/poliqarp/ |website=nkjp.pl |access-date=1 December 2020}}</ref><ref>{{cite web |title=Poliqarp 1.1 |url=http://nlp.ipipan.waw.pl/Poliqarp/ |website=nlp.ipipan.waw.pl |access-date=1 December 2020}}</ref>
==Features== * Custom query language<ref>{{cite journal |last1=Janus |first1=Daniel |last2=Przepiórkowski |first2=Adam |title=Poliqarp: an open source corpus indexer and search engine with syntactic extensions |url=https://dl.acm.org/doi/10.5555/1557769.1557795 |website=Proceedings of the 45th Annual Meeting of the ACL on Interactive Poster and Demonstration Sessions |publisher=Association for Computational Linguistics |access-date=1 December 2020 |pages=85–88 |date=25 June 2007}}</ref> * Two-level regular expressions: ** operating at the level of characters in words ** operating at the level of words in statements/paragraphs * Good performance * Compact corpus representation (compared to similar projects) * Portability across operating systems: Linux/BSD/Win32 * Lack of portability across endianness (current release works only on little endian devices)
==References== {{reflist}}
==External links== * [http://www.korpus.pl/index.php?lang=en&page=welcome Polish corpus website (in English)] * [https://poliqarp.sourceforge.net/ Project website on SourceForge] * [https://web.archive.org/web/20070310131638/http://poliqarp.suxx.pl/ Search plugin for Firefox]
Category:Information retrieval systems