GraphQL

Query language and execution engine for APIs, letting clients request exactly the data shape they need from a single endpoint rather than multiple fixed REST routes. Anchored at 2015 -- Facebook publicly introduced it at React.js Conf (Jan 28-29, 2015) and open-sourced the specification and reference implementation later that year (graphql-spec repository, 2015), after roughly three years of internal use since 2012. Distinctness Test: 2/3 -- sub_tab-scored, but deliberately left unparented (parent_innovation_id NULL): GraphQL originated in and was first open-sourced from Facebook's JavaScript/React ecosystem (graphql-js was the reference implementation), but the specification itself is language-agnostic and is now implemented across virtually every backend language -- nesting it under JavaScript would have undersold how general-purpose it has become, a materially weaker parent-child fit than TypeScript's literal compile-to-JS relationship. Independent commercialization is real (Apollo GraphQL/Hasura tooling market, a genuinely separate API-design decision from REST); independent arrival trigger is real (the 2015 public introduction is a distinct, well-documented event); independent data footprint is the weak leg -- thin academic literature, most of its real footprint is industry blog/GitHub activity rather than citable papers, a real construct-validity gap this graph's OpenAlex-based signals generally have for API-design tooling specifically. Passed Distinctness Test 2026-08-29.