2.4.2 GeometryRowTypes
The following GeometryRowTypes sections specify the Row_Type elements that make up geometric paths. They specify the allowable XML structures that can exist under a Geometry Section_Type element. The heading of each section specifies the T attribute required for that structure.
The T attribute of a Row_Type element of a Geometry Section_Type element MUST be equal to one of the structures defined in the following sections. The meaning of the attribute is specified in the corresponding section.