This specification proposes the Agreement-based Grid Service Management (OGSI-Agreement) model, defining a set of OGSI-
compatible portTypes through which management applications and services can negotiate with management services for the 
purpose of managing Grid services and other applications or resources. These negotiations dynamically mediate between 
users and service providers within virtual organizations, related by potentially complex community relationships. The 
OGSI-Agreement negotiation model allows management in these environments where centralized control is impossible. The 
fundamental mechanism of OGSI-Agreement is the creation of OGSI-compliant Agreement services each of which represents an
 ongoing relationship between an agreement provider and a customer (management client) known in OGSI-Agreement as the 
agreement initiator. This agreement defines behavior of a delivered service with respect to a service consumer. These 
roles may be served by distinct entities or merged, depending on the scenario. Many different service control and 
monitoring strategies are possible for an agreement provider to satisfy its agreements, and OGSI-Agreement does not 
require any specific approach. .