Assign attributes to territory management


If i want to assign attribute for "country" only to territories such that the territories can be searched on basis of the defined countries(E.g i have created two sales org units in ppoca_crm wherein i want one for country DE and one for country BE); then how exactly and where do i have to define the attributes???

Whether it is in ppoca_crm transaction or crmm_terrman directly or how???

Thanks in advance.