Federation Compatibility Matrix

The following list gives you an Overview of the compatibility between Cosmo and other Federation Implementations.

Apollo Federation Version 1 Compatibility

Directive	State
@extends	Supported
@external	Supported
@key	Supported
@key (composite keys)	Supported
@provides	Supported
@requires	Supported
@tag	Supported

Apollo Federation Version 2 Compatibility

2.0

Directive	State
@inaccessible	Partially Supported (full support planned)
@override	Supported
@shareable	Supported
@key "resolvable" argument	Supported
@link	Supported (but unnecessary)

2.1

Directive	State
@composeDirective	Planned
@requires "fields" argument supports arguments	Supported

2.3

Directive	State
@key on INTERFACE	Supported
@interfaceObject	Supported

2.5

Directive	State
@authenticated	Supported
@requiresScopes	Supported