The Workflow task collection is a default collection that can be executed from the service document. When accessed, all the tasks for the user who signed in are displayed according to the SAP system customizations. The collection contains a list of work items and their respective atom entries, including header data (basic data). Each entry contains three different actions:
Forward
Reserve
Release
From each entry you can see each work item and its collections.
The possible URLs for queries on Workflow tasks are as follows:
From the Workflow Generic Task service – outputs all the tasks in the inbox:
http://<host name>:<port>/sap/opu/sdata/sap/wfgentaskprocessing/WorkflowTaskCollection?$format=xml
From the Workflow User Decision Task service – outputs all the tasks in the inbox of type 'User Decision'
http://<host name>:<port>/sap/opu/sdata/sap/wfdecisiontaskprocessing/WorkflowTaskCollection?$format=xml
From the Workflow Dialog Activity Task service – outputs all the tasks in the inbox of type 'Activity'
http://<host name>:<port>/sap/opu/sdata/sap/wfactivitytaskprocessing/WorkflowTaskCollection?$format=xml