Using workflow information in EBS concurrent program

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I have a requirements where workflow process invokes several EBS custom concurrent programs, and the concurrent programs need to share information. One way to share information in a workflow is using item attributes. Another way to share information across concurrent programs is to store the shared information in a table. But the client is insisting on using workflow capabilities inside concurrent programs.

The concurrent program in a workflow calls FND_WF_STANDARD.EXECUTECONCPROGRAM

This functions in turn calls EBS concurrent program using EBS concurrent program APIs, after going thru few internal functions. But then workflow context or keys are not available to EBS concurrent program, so I do not see a way to use setitemattr... or getitemattr... workflow APIs inside a concurrent program.

Is there a any other way to share information between concurrent program activities in a workflow process?