<xs:element name="XYZ" type="PointSimpleType"><xs:annotation><xs:documentation>The XYZ element is the Cartesian three-dimensional coordinates of the 3D point.</xs:documentation></xs:annotation></xs:element>
The optional label attribute is the model entity "nameplate". Normally it can be seen at the entity item in the project tree.
Source
<xs:complexType name="PointEntityType"><xs:annotation><xs:documentation>The PointEntityType is a geometric entity that is a 3D point. It is normally used as underlying geometry for vertices.</xs:documentation></xs:annotation><xs:complexContent><xs:extension base="GeometryBaseType"><xs:sequence><xs:element name="XYZ" type="PointSimpleType"><xs:annotation><xs:documentation>The XYZ element is the Cartesian three-dimensional coordinates of the 3D point.</xs:documentation></xs:annotation></xs:element></xs:sequence></xs:extension></xs:complexContent></xs:complexType>