A software framework used to build services that collect and aggregate data. MDS4 Services (such as the Index and Trigger services) are built on the Aggregator Framework, and are sometimes called Aggregator Services.

[olink to agg framework doc]

Services that are built on the Aggregator Framework, such as the MDS4 Index Service and Trigger Service.

A Java class that implements an interface (defined as part of the Aggregator Framework) to collect XML-formatted data. MDS4 contains three aggregator sources: the query aggregator source, the subscription aggregator source, and the execution aggregator source.

An aggregator service in MDS4 that serves as a registry similar to UDDI, but much more flexible. Indexes collect information and publish that information as WSRF resource properties.

An aggregator service (in MDS4) that collects information and compares that data against a set of conditions defined in a configuration file. When a condition is met, or triggered, the specified action takes place (for example, an email is sent to a system administrator when the disk space on a server reaches a threshold).