New Version: 2018.02.12 1.4.1.13441

[Han]

If you have a collection of different "structures" for records, you can declare them with constants:

RecordType1:={ { "Name", "DOB", "SS#", "Gender" } };
RecordType2:={ { "Name", "Salary", "DateOfHire"} };
...

To "declare" a new record, use:

AFiles("NewRecord"):=RecordType1;

which creates an app variable named NewRecord whose data structure is RecordType1.

You can even expand upon the post above and add in a second list that contains the data types, and have the records actually start at the third position onward within each record list.

So even though HPPPL does not have classes and structures, you can implement them fairly easily.