1*5971e316Smrgsink: "{ S[] -> a[] }" 2*5971e316Smrgmust_source: "{ T[] -> a[]; U[] -> a[] }" 3*5971e316Smrgschedule: 4*5971e316Smrg domain: "{ U[]; S[]; T[] }" 5*5971e316Smrg child: 6*5971e316Smrg sequence: 7*5971e316Smrg - filter: "{ T[]; U[] }" 8*5971e316Smrg - filter: "{ S[] }" 9