Bmm_Expression implementation for using in archetype rules

[borut.jures]

Pieter has a development version of Archie with many changes regarding ADL2.

There is also a discussion about the expressions:

ASSERTION in openehr_expression_104.bmm is not in accordance with the specifications

There appear to be more differences, unfortunately. Differences between the model in Archie and Expression Language (EL) that are not simple renames that I found so far: EXPR_FUNCTION.function_def is of type FUNCTION_DEF. It is EXPR_FUNCTION.function_name as a string in Archie. There is no function_def class in Archie. OPERATOR_DEF_BUILTIN is an enum in Archie (renames are easy, parsing/serialization slightly more tricky) EXPR_TYPE_DEF is the enum EXPRESSION_TYPE in archie (renames are easy, …

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p.s.
Congratulations on your BMM and ADL2 parsers