The published OCX Schema

The definition of the vessel Y grid system YGrid 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.
YSpacingGroup	ocx	ocx:GridSpacingSystem_T	req.	[1, ∞]	False	The definition of a grid spacing group for a sequence of grid positions with equal spacing

YGrid 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.