Sparql Family
SPARQL (SPARQL Protocol and RDF Query Language) is a standard for querying and manipulating data stored in the Resource Description Framework (RDF), which is a standard for representing and sharing structured, machine-readable data on the web.
SPARQL is a powerful and flexible query language that enables users to ask complex and sophisticated questions about RDF data, and to retrieve and process the results in a variety of formats. It is based on the idea of using variables and patterns to describe the data that users want to retrieve, and it provides a wide range of operators and functions for filtering, aggregating, and manipulating the results.
SPARQL is supported by a large and active community of developers and users, and it is considered a key technology for the development of the decentralized web (Web 3.0) and other emerging technologies. It is supported by a wide range of tools and software applications, including web browsers, semantic web platforms, and knowledge management systems.
Sparql 1.1 https://www.w3.org/TR/sparql11-overview/
Sparql-FED https://www.w3.org/TR/2013/REC-sparql11-federated-query-20130321/
Sparql-MM https://github.com/tkurz/sparql-mm
Linked Data Fragments: https://github.com/comunica/