Update description for numerical value ranges

[jamesrhester]

_enumeration.range can apply to Array types with no ambiguity, so I thought it was worth stating that it can apply to the contents of array types as well. Other compound types are not covered, as Lists can have heterogenous types, as can Tables.

[vaitkus]

I am all in favour of this extension. However, maybe it would make sense to also allow this to Matrixes (all elements of the same type) as well as Lists and Tables where all elements are declared to have the same type?

In earlier revisions of DDLm, the _type.contents attribute allowed to specify complex content type expressions (something along the lines of Text|Integer), but nowadays the type is generally the same for all elements, unless something like Implied, ByReference or Inherited is used (which may still also resolve to a single type in the end).

Furthermore, the few actual cases where the _enumeration.range is used with a more complex container type involve Lists (see _pd_calc.component_intensities_total and _pd_calc.component_intensities_net from the pdCIF dictionary).

[jamesrhester]

I am all in favour of this extension. However, maybe it would make sense to also allow this to Matrixes (all elements of the same type) as well as Lists and Tables where all elements are declared to have the same type?

I have updated accordingly.