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federation-compatibility-matrix.md

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

Federation Compatibility Matrix

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 Supported
@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