Following are mandatory iterms from each data object in WFE:  

deposition:
dep_set_id 

wf_class_dict:
wf_class_id 

wf_instance:
wf_inst_id
wf_class_id

wf_task:
wf_task_id
wf_inst_id
wf_class_id

wf_reference:
dep_set_id
hash_id

