Change "null" to "not set" in invariants

aas-core-works / aas-core-meta

Provide formalized meta-models for Asset Administration Shell (AAS).

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Change "null" to "not set" in invariants #163

Closed mristin closed 2 years ago

mristin commented 2 years ago

We replace "null" with "not set" in the invariant descriptions to obtain invariant descriptions which generalize better across different programming languages. For example, "null" is "none" in Python, so this could cause some confusion.