The gml:rangeSet property element contains the values of the coverage
(sometimes called the attribute values). Its content model is given by gml:RangeSetType.
This content model supports a structural description of the range. The semantic information
describing the range set is embedded using a uniform method, as part of the explicit values,
or as a template value accompanying the representation using gml:DataBlock and gml:File. The
values from each component (or “band”) in the range may be encoded within a
gml:ValueArray element or a concrete member of the gml:AbstractScalarValueList substitution
group . Use of these elements satisfies the value-type homogeneity
requirement.