openCypher

Resources

The following Cypher® resources are available.

• The Cypher Query Language Reference (Version 9), containing the complete reference for Version 9 of the Cypher query language.
• The Cypher Style Guide is comprised of:
  • Syntax guidelines for composing Cypher queries in a conventional, readability-oriented manner.
  • Guidelines that may affect the semantics of queries.
• The TCK (Technology Compatibility Kit) is a Cucumber-based set of tests that can be used for any Cypher implementation in any of the many languages supported by Cucumber.
  • Defines the correct behaviour of Cypher under various conditions.
  • Provides an unambiguous way of certifying implementations for correctness.
  • Documents the behaviour of queries in a clear manner.
  • Grouped into features, each of which consists of a set of scenarios, which comprise ordered steps defining the prerequisites, input and expected output.
  • Allows a proposed change to be expressed clearly, through the modification of existing scenarios or the addition of a new scenario.
• Grammar specification
• A syntax and language composition specification in XML format, along with derived artifacts comprising a parser, EBNF-style grammar(s), and railroad diagrams.
• An XML grammar definition is used to generate an EBNF and an Antlr4 grammar for use by projects wanting to parse Cypher, and “Railroad Diagrams” which document the syntax.