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Azure / opendigitaltwins-dtdl

Digital Twins Definition Language
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typo in DLTDv3 Relationship #176

Closed smichea closed 1 year ago

smichea commented 1 year ago

It is written here https://github.com/Azure/opendigitaltwins-dtdl/blob/c3d5f1e7759d23cfe22b34521d9b17c261d76187/DTDL/v3/DTDL.v3.md?plain=1#L358 that the property minMultiplicity must be equal to 0, instead of >= 0

jrdouceur commented 1 year ago

Not a typo, just a possibly unexpected constraint. Per the DTDL metamodel, zero is both the minimum and maximum value allowed for minMultiplicity.

If DTDL permitted a minMultiplicity greater than zero, this would require any service that supports Relationships to provide a mechanism to simultaneously instantiate an Interface and at least one Relationship sourced from the Interface; otherwise, the Interface would fail to be valid at the moment it is instantiated.

smichea commented 1 year ago

make sense. thank you