Administrative Contact - The administrative contact is an individual, role or organization authorized to interact with the registry or registrar on behalf of the Domain Holder. The administrative contact should be able to answer non-technical questions about the domain name's registration and the SLD Holder. In all cases, the Administrative Contact is viewed as the authoritative point of contact for the domain name, second only to the Registrant. Typically, third parties with specific inquiries or concerns will use contact records to determine who should act upon specific issues related to a domain name record. There are typically three of these contact types associated with a domain name record, the Administrative contact, the Billing contact and the Technical contact.
Some examples are .us for the United States, .ca for Canada, .jp for Japan, .de for Germany, etc.
A domain name is hierarchical and often conveys information about the type of entity using the domain name. A domain name is simply a label that represents a domain, which is a subset of the total domain name space. Domain names at the same level of the hierarchy must be unique. Extensible Provisioning Protocol Extensible Markup Language - XML is a markup language for documents containing structured information. Almost all documents have some structure.