How to use the module in schema way?

I'm building graphQL service with [graphql-tools](https://github.com/apollostack/graphql-tools) which is a awesome tool that allows us do type definition with the [graphql schema](http://graphql.org/learn/schema/). I think it's better than just using api(e.g. [the graphql-js's way](https://github.com/graphql/graphql-js/blob/master/README.md#using-graphqljs)) because stuffs like types should be language agnostic. Now i want to integrate `relay` with `graphql` to make component management and data fetching easier in the web front end.

This module seems that i have to define all the types using api which is not the exact way i used as i mentioned above. So my concern is how to use this module without breaking current code. Thanks!

Start by reviewing the graphql-tools schema/type-definition approach and the graphql-js API referenced in the report, then compare them with this module’s current Relay integration. Define the supported schema-based usage and verify that it does not break existing code; the issue provides no file or test names to run.

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