Mathematica: Webel ADT pseudo classes: 'Q: Do I have to use these EX$Val scalar "atom" thingies and the EX$Row, EX$RowList, and EX$RowMap? Can't I just use Wolfram Language Lists and Associations?' A: Of course you can also use the basic Wolfram Language!
Mathematica: Webel ADT pseudo classes: An EX$Val has concise methods for testing the type of its wrapped '$$' value: isR, isI, isB, isQ, isS. These may be used in ADT "constructor" type tests.
Mathematica: Webel ADT pseudo classes: The validity of the type of a wrapped '$$' value of an EX$Val may be checked in ADT "constructors" which have type checking utility support. This strategy has been chosen over sub-types of EX$Val.
Frequently used typed {} Lists This content has been marked as discussing an ADVANCED topic! Gallery Tutorial [TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models. Section SECTION: Modelling the Wolfram Language in SysMLv1 and related Webel coding conventions
Figure 8-10: Model library for primitive value types Gallery Tutorial TRAIL: The SysML-1.6 Hybrid SUV sample and specification diagrams in MagicDraw/Cameo (with annotations) [UNDERGOING UPDATE to SysML1.7] Section Section: SysML-1.6 specification diagrams: 08 Blocks Slide kind UML Profile Diagram
More specific value types can define the concrete data representations that a digital computer can process, such as conventional Float, Integer, or String types. Source OMG Systems Modeling Language (SysML) 1.6
