ODMF2 — Herbrand semantics

Herbrand semantics. In 16.2.3 (More Advanced Concepts), under the XML example, the paragraph starting "In UML, there is a strict separation" is incorrect. The M0 level of UML can be real world individuals, not just software implementations (this is called an "analysis" application). Even when they are software implementations, they do not need to be specific ones, such as an SQL database manager. The last sentence is fine because of the qualification. The previous ones makes it seem like the qualification is always the case. The entrie next paragraph seems to also to mit the qualification, and I think can be dropped, since the presence of particular kinds of nulls in databases not relate to UML as generally applied. The last sentence of that paragraph can be used as a summary of the discussion.

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