schema uri in example using a string

Our Presentation Exchange library conforms to PE v1. In our library we are enforcing that a schema URI is a valid URI according to https://identity.foundation/presentation-exchange/spec/v1.0.0/#input-descriptor-object

In this profile an example is however given where the URI is the string at https://identity.foundation/jwt-vc-presentation-profile/#requesting-verifiable-credentials

The example:
````json
"schema": [
{
"uri": "InteropExampleVC"
}
]
````

Is this on purpose or is this an error in the example? If a simple string is allowed in the profile, it for sure needs to be mentioned. I do not see how a string would work for a location where an actual schema is supposed to be found though