The names that DMN 1.1 gave the date and time types (:dmn_1_1_types): dateTime is date and time, dayTimeDuration is
days and time duration and yearMonthDuration is years and months duration. DMN 1.2 renamed them to what FEEL calls them, and
feel knows only those; the models of the DMN TCK of that time (0007, 0036) still write the old ones.
With the extension on, a typeRef of one of the names reads as the type, wherever a typeRef is read (an input, a decision, a
business knowledge model, a column of a table, a parameter of a function, an item definition, the models that are imported too). A
model that defines an item definition of the name gets its own type: dateTime can be a record there (DD-28).