Specification of the Cypher property graph query language
= The Cypher Property Graph Query Language
image:https://travis-ci.org/opencypher/openCypher.svg?branch=master["Build Status", link="https://travis-ci.org/opencypher/openCypher"]
This repository holds the specification of Cypher, a declarative property graph query language. Its purpose is to be central to the process of evolving the specification and standardisation of Cypher as a graph query language.
== Overview of the process
Changes to openCypher are made through consensus in the openCypher Implementers Group (oCIG). The process for proposing changes, voting on proposals and measuring consensus is described in https://docs.google.com/presentation/d/1OHMxiz9xW6rINiJcCdm28a8uNcZEtCsMPfhFSIA-XXE/edit[this set of slides].
Refer to the link:CIP-PROCESS.adoc[Cypher Improvement Process] document for more details on CIPs, CIRs, their structure and lifecycle.
== The structure of this repository
/cip** Contains a list of accepted CIP documents.
/grammar** Contains the Cypher grammar specification, in XML source format. ** A more readily consumable form of the grammar is generated as output from the build: *** https://s3.amazonaws.com/artifacts.opencypher.org/railroad/Cypher.html[Railroad diagrams] *** https://s3.amazonaws.com/artifacts.opencypher.org/cypher.ebnf[EBNF] *** https://s3.amazonaws.com/artifacts.opencypher.org/Cypher.g4[ANTLR4 Grammar]
/tck** Contains a set of Cucumber features that define Cypher behaviour, and documentation on how to use it.
/tools** Contains code that tests the integrity of the repository, generates release artifacts, and aids implementors of openCypher.
== Contact us
There are several ways to get in touch with the openCypher project and its participants:
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openCypherproject is licensed under the http://www.apache.org/licenses/LICENSE-2.0[Apache license 2.0]. // TODO: I feel like we should flesh this section out a bit -- not sure how