Attributes for Subcollection properties
          In the IDO Property Wizard, after you select the Subcollection option and then click , provide values for these attributes: 
         
         - Subcollection IDO
 - (Required) Select the IDO that is to be used as the subcollection for the property's primary collection and associated with this property.
 - Property Name
 - (Required) Provide the name to be used for the new property.