MARTE — NFP does not introduce the concept of dimension

Subject: NFP does not introduce the concept of dimension. Details: NFP defines the notion of unit attached to a type but it does explicitly express the dimension related to this unit. This should be fixed to provide a comprehensive support for modeling quantities in RTES.

The Dimension concept, and its possible attributes such as the base dimensions,
is required to do dimensional analysis and verify consistency of expressions with
quantitative NFPs.
The concept of Dimension is not explicitly formalized in the NFP domain model
nor in the NFP profile. However, the enumeration which gather the literals that
are stereotyped by Unit can be already seen as a Dimension. We make this
concept explicit here. The design of the current profile support this clarification
with minimal changes.
Note that SysML also includes the concept of dimension. As a first result of
discussions between SysML and MARTE communities and a first step towards
an alignment between both profiles in this domain, we propose to also explicitly
support this concept.