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335250 (2) [Avatar] Offline
Everything within the context adheres to the semantics of the model, but outside the boundary the same concept may have a different meaning

The focus of this section is a few abstract concepts that are relatively high-falutin' for most programmers. This is therefore an area where precision is critical to avoid losing the reader. The words "concept" and "meaning" have the same, well, meaning. Nothing is done to relieve the confusion of the reader who thinks "a concept is the meaning of a symbol, so what can it mean to say that a concept has a different meaning?".

Given that the first clause relates a language-category entity ("context") to a model-category entity ("semantics"), I suggest that it would be clearest if the second clause were written in the same style, e.g "outside the boundary the same term may have different semantics". Repetition be damned; this is instruction, not rhetoric.
Daniel Deogun (5) [Avatar] Offline
Good point – thanks! I'll make sure to clarify this in the next revision of chapter 3.