The published OCX Schema

Structural concept of a cell defining a closed volume which is part of a compartment (physical space). Cell has the following child elements:

Child	Namespace	Type	Use	Cardinality	Choice	Description
CellBoundary	ocx	ocx:CellBoundary_T	req.	[1, ∞]	False	The reference to a Panel surface making up one Cell boundary.
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.

Cell has the following attributes:

Attribute	Namespace	Type	Use	Description
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.
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.