Figure 2
From: CaGrid Workflow Toolkit: A taverna based workflow tool for cancer grid
All four plug-ins in Taverna service panel. The caGrid workflow toolkit currently contains four plug-ins, i.e., cagrid-activity (caGrid service... and caGrid service from WSDL...) for service discovery, invocation and security enforcement; cql-builder (CQL Builder) for visualized construction of CQL clause to query data services; cagrid-transfer-activity (CaGrid Transfer Activity) for file transfers between clients and services; cds-activity (CDS Activity) for credential delegation.