When designing the namespace, do not worry about limitations imposed by the transition from NIS. You can modify your NIS+ domain later, after you know how your final NIS+ configuration will look.
Select the model of information administration, such as the domain structure, that your site will use. Without a clear idea of how information at your site will be created, stored, used, and administered, it is difficult to make the design decisions suggested in this section. You could end up with a design that is more expensive to operate than necessary. You also run the risk of designing a namespace that does not suit your needs. Changing the namespace design after it has been set up is costly.