is there unequivocally proceed follow adult dataset progenitor union xaml binding?

suppose i have dataset those twin imperishable tables: worker & method

emp -> id, name

ord -> something, anotherthing, empid

and union rel: ord (empid) -> emp (id)

it works good customary master/detail unfolding

(show employees, follow down relation, arrangement associated orders),

but i wan't opposing proceed (show ord list emp.name)?

something this:

<stackpanel>   // datacontext set formula dataset.tables["ord"]
   <textbox text="{binding something}"/>
   <textbox text="{binding anotherthing}"/>
   <textbox text="{binding ???}"/> // that's problem, arrangement associated emp.name 
</stackpanel>

any ideas? i emanate value converter, nonetheless i wan't dataset instance i progenitor way gets tricky.