The implementation of the Rascal meta-programming language (including interpreter, type checker, parser generator, compiler and JVM based run-time system)

Query-Based Code Analysis Engine

TypeQL: the power of programming, in your database

PGQL is an SQL-based query language for property graphs

GraphQL interface for querying and serving linked data on the Web.

The YQL+ parser, execution engine, and source SDK.

A query language for JSON and a template engine to generate text output.

Process Query Language (PQL) is a special-purpose programming language for managing process models based on information about process instances that these models describe. PQL is based upon temporal logic and adopts the concrete syntax of SQL.

一款基于rsql的mybatis通用查询插件

TypeQL language library for Java

A simple cross-data store full-text search language for Java 8+

Java 8 library for strongly typed graph data

Search query language parser written in Java

Java DSL query engine for simple boolean algebra

A Java query library using a SQL grammar

use Titan with a lot of angulillos

(Deprecated) A Time Series Database Proxy in Java with DSL, see https://github.com/libtsdb and https://github.com/at15/reika

A simple yet intuitive tag-based query language

Hammer Data Project

Parser for RSQL / FIQL – query language for RESTful APIs