Hello,
If you anticipate prompt responses on SCN then you will be sorely disappointed!
The best way to query the SAP workflow tables is by using the SAP_WAPI* function modules.
Take a look at them, especially the SAP_WAPI*GET* ones.
Only if they can't help you should you start accessing the tables directly.
SAP stores (almost) all of its information in tables, so it can be accessed. What exactly are you looking for?
regards
Rick