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!
ADT hierarchy for the EX`package for extracted structured data Gallery Tutorial [TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models. Section SECTION: Webel ADT case study: Extracting structured data from unstructured Open XML spreadsheet data
Overview of the Webel OpenXML libraries ADT Case Study Gallery Tutorial [TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models. Section SECTION: Webel ADT case study: Extracting structured data from unstructured Open XML spreadsheet data