Description: An application schema defines the structure of the data and the operations available in a GraphQL API. This schema acts as a contract between the client and the server, specifying what types of data can be queried and what mutations can be performed. In GraphQL, the schema is described using a schema definition language (SDL), allowing developers to define types, queries, mutations, and their relationships. Types can be scalars, such as ‘Int’ or ‘String’, or complex types, such as ‘Objects’ and ‘Interfaces’. Additionally, the schema allows for query validation, ensuring that clients can only access the data that is permitted. The clarity and precision of the schema are fundamental to the performance and maintainability of the API, as they facilitate understanding of how to interact with the available data and operations. In summary, the application schema in GraphQL is essential for building robust and efficient APIs, providing a solid foundation for communication between clients and servers in a wide range of applications.
