Any distributed infrastructure that is federated to combine resources from multiple organizations managed by different administrative domains. The Grid aims to coordinate the sharing of resources in a dynamic and multi-institutional setting to provide additional functionality beyond its constituent parts: brokering, workflow coordination, integration of computing and storage. In order for this to happen, interoperability and standards need to be defined at various levels: for resource access, for coordination and business logic, for data storage and management, for network access and so forth.
