fragment keyword allows you to define new fragments that can be referenced in a query, as per GraphQL specification. The point is that if there are multiple parts which query the same set of fields, you can define a fragment and refer to it multiple times instead. Fragments can be nested inside fragments, but no cycles are allowed. Here is one contrived example.
curl -H "Content-Type: application/graphql+-" localhost:8080/query -XPOST -d $'
query {
debug(func: uid(1)) {
[email protected]
...TestFrag
}
}
fragment TestFrag {
initial_release_date
...TestFragB
}
fragment TestFragB {
country
}' | python -m json.tool | less
This is a companion discussion topic for the original entry at https://dgraph.io/docs/query-language/fragments/