docs/content/graphql/reference/unions.md

title, redirect_from, versions, topics

title	redirect_from	versions	topics
Unions	/v4/union /v4/reference/union	fpt ghec ghes ghae * * * *	API

About unions

A union is a type of object representing many objects.

For example, a field marked as an ProjectCardItem could be an Issue or a PullRequest because each of those objects can be inside a project card. Using a union instead of an object gives you flexibility.

For more information, see "Introduction to GraphQL."