SDO 3.0 API Request - XSDHelper isGlobalType & isGlobalProperty

Hello All,

I would like to propose 2 new APIs for XSDHelper.  These APIs would 
allow the user to determine if a type/property corresponds to a global 
item in the corresponding XML schema.  The signatures would be as follows:

    public boolean isGlobalType(Type type); // NEW
    public boolean isGlobalProperty(Property property);  // NEW

These methods are consistent with the other types of operations allowed 
on XSDHelper:

    public boolean isAttribute(Property property);
    public boolean isElement(Property property);
    public boolean isMixed(Type type);
    etc.

-Blaise