A Table Group class is the collection container object used to access and create table groups. Like the table class, table group classes are generated in pairs, a row class and a collection class.

The naming convention for table group classes is <prefix>TblGrp<message name><group name> for the collection object, and <prefix>TblGrp<message name><group name>Row for the row object. For example, if you had a table group named "Insurance" in a message called "Admit" and picked the prefix "HL7", the classes generated would be HL7TblGrpAdmitInsurance and HL7TblGrpAdmitInsuranceRow.