The published OCX Schema

A grouping of occurrences. Can also contain other OccurrenceGroup to form a nested level of groups. OccurrenceGroup has the following child elements:

Child	Namespace	Type	Use	Cardinality	Choice	Description
Description	ocx	xs:string	opt.	[0, 1]	False	Contains a description of the component its parent represents. The description is stored as a string. You can use this element for whatever purposes you require. This element can be used inside many OCX XML elements but is optional.
OccurrenceGroup	ocx	ocx:OccurrenceGroup_T	req.	[1, ∞]	True	A grouping of occurrences. Can also contain other OccurrenceGroup to form a nested level of groups.
Occurrence	ocx	ocx:Occurrence_T	req.	[1, ∞]	True	The refence to the part's occurrence in a defined view or configuration.

OccurrenceGroup has the following attributes:

Attribute	Namespace	Type	Use	Default	Fixed	Description
name	ocx	xs:string	opt.			An optional descriptive or display name.
id	ocx	xs:ID	req.			An identifier for an element unique within the scope of the XML file. Each id must be unique within a document. The attribute uses the standard XML 1.0 ID type as defined in the XML Schema specification. This attribute is required in many OCX XML elements and an application should generate them automatically.