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GraphQL
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<p>GraphQL is a data <a href="/facts/Query_language/Sa6K4xXM">query</a> and <a href="/facts/Data_manipulation_language/eeJRDUEl">manipulation</a> language that allows specifying what data is to be retrieved ("<a href="/facts/Declarative_programming/gogtdzcJ">declarative</a> data fetching") or modified. A GraphQL server can process a client query using data from separate sources and present the results in a unified <a href="/facts/Graph_(abstract_data_type)/b8qcddXa">graph</a>. The language is not tied to any specific <a href="/facts/Database/VYcpkevb">database</a> or storage engine. There are several <a href="/facts/Open-source_software/HzTaB8E9">open-source</a> <a href="/facts/Runtime_system/YmCuC4xP">runtime engines</a> for GraphQL. </p>