Design Microservices Architecture with Patterns and Principles - Graph: QLA Query Language for APIs

GraphQL is a query language for APIs developed by Facebook, released in 2015. It allows clients to specify the data structure they need, providing predictable results and reducing network calls. GraphQL supports API evolution without versioning, enabling continuous access to new features. It uses HTTP POST for data creation, similar to REST APIs but more efficient in handling multiple resources in a single request.

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