Instead of
Check that the [Referable.idShort](https://aas-core-works.github.io/aas-core-meta/v3_1/Referable.html#idShort)'s among the referables are unique.
it shall be
Check that the [Referable.idShort](https://aas-core-works.github.io/aas-core-meta/v3_1/Referable.html#idShort)'s among the referables are unique in their namespace.
The documentation of idShortsAreUnique is not correct (in V3.0 as well as in V3.1): https://aas-core-works.github.io/aas-core-meta/v3_1/IdShortsAreUnique.html
Instead of
Check that the [Referable.idShort](https://aas-core-works.github.io/aas-core-meta/v3_1/Referable.html#idShort)'s among the referables are unique.
it shall beCheck that the [Referable.idShort](https://aas-core-works.github.io/aas-core-meta/v3_1/Referable.html#idShort)'s among the referables are unique in their namespace.