When a resource is found in or through an APPN network, the interchange node through which the APPN network is entered becomes the owning CDRM of the resource to other VTAMs in the subarea network, unless the resource was predefined as a CDRSC with an owning CDRM name coded. If there are multiple interchange nodes, the owning CDRM can change, depending on the best search route at the time. If cross-domain resources (CDRSCs) are defined with the CDRM operand, they might have to be modified to specify an interchange node as the owning CDRM.