Abstract class representing the XDM type xs:decimal. An instance of xs:decimal that is also
an instance of xs:integer will be implemented as an instance of IntegerValue; every other
xs:decimal will be implemented as an instance of BigDecimalValue.
9.8: in previous releases, the concrete class BigDecimalValue was named DecimalValue,
and its instances did not include integers. The new hierarchy is designed to reflect the
XDM type hierarchy more faithfully
Fields inherited from class net.sf.saxon.value.AtomicValue