The published OCX Schema

A rectangular hole in u-v space with corner fillets of equal radii. RectangularHole 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.
FilletRadius	ocx	ocx:Quantity_T	opt.	[0, 1]	False	Corner fillet radius. If not given, the fillet radius is taken as 0.5*Min of (Height,Width), i.e. half of the smallest of the Height or the Width .
Height	ocx	ocx:Quantity_T	req.	[1, 1]	False	The height of the hole.
Width	ocx	ocx:Quantity_T	req.	[1, 1]	False	The width of the hole.

RectangularHole 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.