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buildingSMART / NextGen-IFC

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Mapping between current UML model and EXPRESS rules is inconsistent #3

Open tpaviot opened 4 years ago

tpaviot commented 4 years ago

Rules are part of the EXPRESS syntax, and are a very convenient to perform data integrity checking when loading a set of instances from a Part21 Express file. In the current UML model, I understand that rules are represented using a text field that embeds the EXPRESS rule. In the UML, such rules thus appear to be disconnected from the data model whereas they're part of it. Am I right ?

Another approach would be to enrich the current UML model with an UML based rule model that can be serialized to an EXPRESS rule.

aothms commented 4 years ago

We're currently investigating this. We're looking at OCL for example. Any input welcome.