RRGbank

To change a label, click on a node to select a different label from a list. The syntactic category and the function tag (before and after the dash "-") must be selected separately by clicking on the corresponding part of the label.
To add a function tag to a node that does not have one yet, drag it from the list of function tags onto the node.
Re-attach a node by dragging and dropping it on a new parent. This can be used to created discontinuous constituents.
Similarly, nodes can be removed and new ones added by dragging to/from below the tree.
Finally, the bracketing can be edited manually in the text box below the tree; press "validate" to update the tree. Whitespace is ignored. Each token must have a dedicated POS tag.

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(SENTENCE
  (CLAUSE
    (CORE (NP (PRO 0=He)) (NUC (V 1=said)) (. 22=.))
    (CLAUSE
      (CORE
        (NP (OP-DEF 2=the) (CORE_N (NUC_N (N 3=decision))))
        (NUC
          (AUX-TNS 4=was)
          (NP
            (OP-DEF 5=the)
            (CORE_N
              (AP-PERI (CORE_A (NUC_A (A 6=first))))
              (CLAUSE-PERI
                (WHPP (NUC_P (P 7=in)) (PrCS (NP-WH[PREDid=1] (WDT 8=which))))
                (CORE
                  (NP
                    (OP-DEF 9=a)
                    (CORE_N
                      (AP-PERI (CORE_A (NUC_A (A 10=federal))))
                      (NUC_N (N 11=appeals) (N 12=court))))
                  (NUC[NUCid=1] (AUX 13=has) (V 14=ruled))
                  (CLAUSE
                    (CLM 15=whether)
                    (CORE
                      (NP
                        (CORE_N
                          (AP-PERI (CORE_A (NUC_A (A 16=administrative))))
                          (NUC_N (N 17=government) (N 18=proceedings))))
                      (NUC (V 19=qualify))
                      (PP
                        (CORE_P
                          (NUC_P (P 20=as))
                          (NP (CORE_N (NUC_N (N 21=litigation)))))))))))))))))

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(SENTENCE
  (CLAUSE
    (CORE (NP (PRO 0=He)) (NUC (V 1=said)))
    (CLAUSE
      (CORE
        (NP (OP-DEF 2=the) (CORE_N (NUC_N (N 3=decision))))
        (NUC
          (AUX-TNS 4=was)
          (NP
            (OP-DEF 5=the)
            (CORE_N
              (NUC_N
                (A 6=first)
                (CLAUSE-PERI
                  (PrCS
                    (PP-REL
                      (CORE_P (NUC_P (P 7=in)) (NP-REL (PRO-REL 8=which)))))
                  (CORE
                    (NP
                      (OP-DEF 9=a)
                      (CORE_N
                        (AP-PERI (CORE_A (NUC_A (A 10=federal))))
                        (NUC_N (N 11=appeals) (N 12=court))))
                    (NUC (V 14=ruled))
                    (CLAUSE
                      (CLM 15=whether)
                      (CORE
                        (NP
                          (CORE_N
                            (AP-PERI (CORE_A (NUC_A (A 16=administrative))))
                            (NUC_N (N 17=government) (N 18=proceedings))))
                        (NUC (V 19=qualify))
                        (PP
                          (CORE_P
                            (NUC_P (P 20=as))
                            (NP (CORE_N (NUC_N (N 21=litigation)))))))))
                  (OP-TNS 13=has)
                  (. 22=.))))))))))

Supertags

	token	arc	supertag
1	He	2	(NP (PRO <>))
2	said	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (V <>))) (CLAUSE )))
3	the	4	(NP* (OP-DEF <>))
4	decision	15	(NP (CORE_N (NUC_N (N <>))))
5	was	15	(NP* (AUX-TNS <>))
6	the	15	(NP* (OP-DEF <>))
7	first	15	(A <>)
8	in	15	(PP-REL (CORE_P (NUC_P (P <>)) (NP-REL )))
9	which	8	(NP-REL (PRO-REL <>))
10	a	13	(NP* (OP-DEF <>))
11	federal	13	(CORE_N* (AP-PERI (CORE_A (NUC_A (A <>)))))
12	appeals	13	(NUC_N* (N <>))
13	court	15	(NP (CORE_N (NUC_N (N <>))))
14	has	15	(CORE* (OP-TNS <>))
15	ruled	2	(CLAUSE (CORE (NP ) (NUC (NP (CORE_N (NUC_N (A ) (CLAUSE-PERI (PrCS (PP-REL )) (CORE (NP ) (NUC (V <>)) (CLAUSE )))))))))
16	whether	20	(CLAUSE* (CLM <>))
17	administrative	19	(CORE_N* (AP-PERI (CORE_A (NUC_A (A <>)))))
18	government	19	(NUC_N* (N <>))
19	proceedings	20	(NP (CORE_N (NUC_N (N <>))))
20	qualify	15	(CLAUSE (CORE (NP ) (NUC (V <>)) (PP )))
21	as	20	(PP (CORE_P (NUC_P (P <>)) (NP )))
22	litigation	21	(NP (CORE_N (NUC_N (N <>))))
23	.	15	(CLAUSE-PERI* (. <>))