%colgroup.element;
Column Group Element Control For a Table
Holds the INCLUDE or IGNORE keyword to control a conditional marked section, that determines whether the <colgroup> element is defined.
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.
Model
<!ENTITY % colgroup.element "INCLUDE" >