The published OCX Schema

A reference to the parent's cross section. SectionRef has the following child elements:

Child	Namespace	Type	Use	Cardinality	Choice	Description
OffsetU	ocx	ocx:Quantity_T	opt.	[0, 1]	False	The offset from stiffener trace line of cross section in local U direction.
OffsetV	ocx	ocx:Quantity_T	opt.	[0, 1]	False	The offset from stiffener trace-line of cross section in local V direction.

SectionRef has the following attributes:

Attribute	Namespace	Type	Use	Fixed	Description
refType	ocx	Restriction of type xs:QName	req.	ocx:BarSection	The OCX entity type which is referenced. Must be a qulaified OCX name.
localRef	ocx	xs:IDREF	opt.		A rference to a unique ID within the scope of this XML file. Ether a localRef or a GUIDRef shall be provided, or both. The schema will check this by the assertion: test=“(@localRef and not(@ocx:GUIDRef)) or (not(@localRef) and @ocx:GUIDRef) or (@localRef and @ocx:GUIDRef)”.
GUIDRef	ocx	Restriction of type ocx:guid	opt.		A globally unique ID referring to an entity in the authoring application. The sending application creates and holds the GUID. Used to establish a unique reference to an entity persistent between applications. Ether a localRef or a GUIDRef shall be provided, or both. The schema will check this by the assertion: test=“(@localRef and not(@ocx:GUIDRef)) or (not(@localRef) and @ocx:GUIDRef) or (@localRef and @ocx:GUIDRef)”.