Synonyms
NEXI
Definition
NEXI is an information retrieval (IR) query language for searching structured and semi-structured document collections. The language was first introduced for searching XML documents at the annual INEX [3] evaluation forum in 2004, and it was used extensively by INEX for its element retrieval and XML-IR experiments.
Designed as the simplest query language that could possibly work, the language is a tiny subset of XPath 1.0 [1] with an added about() function for identifying elements about some given topic. The language has extensions for question answering, multimedia searching, and searching heterogeneous document collections. NEXI is a language with a strict syntax defined in YACC but it has no semantics; the interpretation of the query is the task of the search engine.
Historical Background
A common information retrieval query language for searching collections of XML documents was needed for specifying the queries at the first INEX in 2002. There, XML markup...
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Recommended Reading
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Trotman, A. (2018). Narrowed Extended XPath I. In: Liu, L., Özsu, M.T. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8265-9_242
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