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Base Modelica package is self-contained wrt lookup #3550

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Base Modelica package is self-contained wrt lookup #3550

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4 changes: 4 additions & 0 deletions RationaleMCP/0031/differences.md
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Expand Up @@ -10,6 +10,10 @@ The definitions before the `model` either define types or global constants.

## Lexical scoping and record definitions

For purposes of lookup, a Base Modelica package shall be handled as a top-level Modelica package:
- During the lookup process, if an identifier is not found within the Base Modelica package, it must refer to a Base Modelica built-in entity.
- Global name lookup of `.x` (or `.x.y.z`) requires `x` to be a built-in or the name of the Base Modelica package.

Lookup in Base Modelica is significantly simplified compared to full Modelica due to the restricted top level structure of a Base Modelica program, but there are two more restrictions on top of that explained in this section.

Taken together, the two restrictions can be summarized concisely as follows:
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