> For the complete documentation index, see [llms.txt](https://neo4j-graphql-server.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://neo4j-graphql-server.gitbook.io/docs/neo4j-graphql-binding/buildneo4jtypedefs.md).

# buildNeo4jTypeDefs

## API Reference

* `typeDefs` (required): Your GraphQL type definitions in [SDL format](https://www.prisma.io/blog/graphql-sdl-schema-definition-language-6755bcb9ce51/). <br>
* `query` (default: `true`): A Boolean controlling whether to generate query types. <br>
* `mutation` (default: `true`): A Boolean controlling whether to generate mutation types.