信息技术 数据库语言 GQL

[中文适用范围]： 本标准定义了用于图形查询语言（GQL）的数据库语言。它涵盖了GQL环境、实施细节、安全性模型以及数据管理等相关概念和术语。 [外文原描述]： This document defines data structures and basic operations on property graphs. It provides capabilities for creating, accessing, querying, maintaining, and controlling property graphs and the data they comprise. This document specifies the syntax and semantics of a data management language for specifying and modifying the structure of property graphs and collections thereof. This document provides a vehicle for portability of data definitions and manipulation among GQL-implementations. Implementations of this document can exist in environments that also support application programming languages, end-user query facilities, and various tools for database design, data administration, and performance optimization.