%Number.datatype;
Number Datatype
Indicates a data value of one or more numeric digits.
Remarks
The NISO JATS table model parameter entity is used in the same way as the equivalent
parameter entity in the XHTML 1.1 table model. Since this parameter entity was named in the same
way as the XHTML 1.1 Tag Set equivalent, it does not follow
the naming conventions for this Tag Set: it is in mixed (not lower) case, and the separator character is a period (not a hyphen).
Model
<!ENTITY % Number.datatype "CDATA" >