GraphQL is an actively used query language created in 2015.

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Example code from Linguist:

# Copyright (c) 2015, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree. An additional grant
# of patent rights can be found in the PATENTS file in the same directory.

schema {
  query: QueryType
  mutation: MutationType
}

type Foo implements Bar {
  one: Type
  two(argument: InputType!): Type
  three(argument: InputType, other: String): Int
  four(argument: String = "string"): String
  five(argument: [String] = ["string", "string"]): String
  six(argument: InputType = {key: "value"}): Type
}

interface Bar {
  one: Type
  four(argument: String = "string"): String
}

union Feed = Story | Article | Advert

scalar CustomScalar

enum Site {
  DESKTOP
  MOBILE
}

input InputType {
  key: String!
  answer: Int = 42
}

extend type Foo {
  seven(argument: [String]): Type
}

directive @skip(if: Boolean!) on FIELD | FRAGMENT_SPREAD | INLINE_FRAGMENT

directive @include(if: Boolean!)
  on FIELD
   | FRAGMENT_SPREAD
   | INLINE_FRAGMENT
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Last updated February 11th, 2019