eXist

eXist is an open source NoSQL database and application platform built on XML technology. It is classified as both a NoSQL Document database and a native XML database (and it provides support for XML, JSON, HTML and Binary documents). Unlike most RDBMS and NoSQL databases, eXist provides XQuery and XSLT as its query and application programming languages.

Exist may refer to:

• Existence
• Exist (song), a single by electronic music artist OVERWERK
• eXist, an open source database management system built on XML
• Existential quantification, in logic and mathematics (symbolized by ∃, read "exists")
• Energetic X-ray Survey Telescope, a proposed hard X-ray imaging all-sky deep survey mission
• Exists (band), formerly Exist, a Malaysian band
• Exists (film), a 2014 horror film
• XIST (gene) X inactive specific transcript, a gene which inactivates extra copies of X-chromosomes.