schema_sample.gql

type Query {
  article(id: ID!): Article
  page(id: ID!): Page
  product(id: ID!): Product
  profile(id: ID!): Profile
}

type Article {
  # Unique identifier for this piece of content */
  id: ID!
  # Image used with headline/title */
  coverImage: Image!
  # Text displayed with `coverImage` as part of headline */
  title: String!
  # Text displayed after `coverImage` and `title` */
  subtitle: String
  # Date of article publication */
  publishDate: String!
  # Plain text estimated read length (e.g. "9 minute read") */
  duration: String
  # Byline credit for the article */
  author: Contributor
  # Photography credit for the images used with the article */
  photographer: Contributor
  # List of categories and sub-categories in which this article could be found.
  categories: [Category!]!
  # Ordered sections of the article contents. */
  sections: [ArticleSection!]!
  # The "tier" of article, used to differentiate how an `ArticleSection` is
  # treated during render.
  tier: ArticleTier!
  # `Article` to be displayed next.
  next: Article
}

type Page {
  id: ID!
  path: String!
  title: String!
  meta: Meta!
  cards: [Card!]!
}

# Union of types having a `sectionType` attribue by which they can be
# disambiguated to their specific type.
union ArticleSection = MarkupSection | PhotoBillboardSection | PhotoSection | SlideshowSection | VideoSection;

# The "tier" of article, used to differentiate how `ArticleSection` is treated
# during render.
enum ArticleTier {
  PRIMARY
  SECONDARY
  TERTIARY
}

# TODO
type Meta {
  keywords: [String!]!
}

type Category {
  id: ID!
  name: String!
  image: Image!
}

type Contributor {
  id: ID!
  name: String!
  image: Image
  bio: string
}

type Image {
  src: String!
  height: Int!
  width: Int!
}

# Represents a video asset and meta data.
type Video {
  # Video duration in seconds.
  duration: Int!
  # Specifies the location of the video assets.
  file: VideoFile!
  # The image to use as the video preview or poster.
  preview: Image!
}

type VideoFile {
  mp4: String!
  webm: String
  ogg: String
  # Static image for display while video loads
  poster: Image
}

enum Position {
  BOTTOM_LEFT,
  BOTTOM_RIGHT,
  TOP_LEFT,
  TOP_RIGHT,
}

type RelativeCoordinates {
  from: Position!
  x: Int!
  y: Int!
}

type ProductCallout {
  content: Product!
  coordinates: RelativeCoordinates!
}

type Photo {
  # `products` array can be empty but the array should be defined (not null)
  products: [ProductCallout!]!
  image: Image!
  contributor: Contributor
  caption: String
}

# A `Section` holding markup to use directly.
type MarkupSection implements Section {
  # Markup to be used
  markup: String!
  # Used for disambiguation of `Section` children
  sectionType: SectionType!
}

# A `Section` representing a `Photo` for display
type PhotoSection implements Section {
  # The Image and associated caption and product meta data
  photo: Photo!
  # Used for disambiguation of `Section` children
  sectionType: SectionType!
}

# A `PhotoSection` with a "billboard" color background. If no `billboardColor`
# is provided should select color from `Photo`.
type PhotoBillboardSection implements Section {
  # Optional background color used in the billboard
  billboardColor: String
  # The Image and associated caption and product meta data
  photo: Photo!
  # Used for disambiguation of `Section` children
  sectionType: SectionType!
}

# A `Section` representing a group of `Photo` instances which can be
# expanded in a "slideshow" or overlay for display.
type SlideshowSection implements Section {
  # The images and associated meta data for products and caption.
  photos: [Photo!]!
  # Used for disambiguation of `Section` children
  sectionType: SectionType!
}

# A `Section` representing a `Video` preloop and the assets for
# showing the player.
type VideoSection implements Section {
  video: Video!
  # Used for disambiguation of `Section` children
  sectionType: SectionType!
}

# Marker for having a `sectionType` property
interface Section {
  # Used for disambiguation of `Section` children
  sectionType: SectionType!
}

# The possible types of Sections.
enum SectionType {
  ACCORDION
  FACT
  INTRODUCTION
  MARKUP
  PHOTO
  PHOTO_BILLBOARD
  PRODUCT_COLLECTION
  RELATED
  SOCIAL_MEDIA
  SHOP_LOOK
  SLIDESHOW
  VIDEO
}

This is really helpful, thank you.