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
      (SENTENCE-PERI
        (PrDP
          (ADVP (CORE_ADV (NUC_ADV (ADV 5=when))))
          (ADVP (CORE_ADV (NUC_ADV (ADV 4=only)))))
        (CLAUSE
          (CORE
            (CORE
              (NP
                (CORE_N
                  (NUC_N (N 7=change))
                  (PP-PERI
                    (CORE_P
                      (NUC_P (P 8=in))
                      (NP
                        (CORE_N
                          (NUC_N (N 13=course))
                          (AP-PERI (CORE_A (NUC_A (A 12=general)))))
                        (NPIP
                          (NP
                            (CORE_N (NUC_N (N 10=economy)))
                            (POS 11='s)
                            (OP-DEF 9=the)))))))
                (OP-DEF 6=a))
              (NUC[NUCid=1] (V 14=seems)))
            (CORE
              (NUC[NUCid=2] (ADVP (CORE_ADV (NUC_ADV (ADV 15=likely)))))))))
      (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 2=normally))))
      (NP (CORE_N (NUC_N (N 1=group))) (OP-DEF 0=The))
      (NUC (V 3=convenes))
      (. 16=.))))

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Supertags

	token	arc	supertag
1	The	2	(NP* (OP-DEF <>))
2	group	4	(NP (CORE_N (NUC_N (N <>))))
3	normally	4	(CORE* (ADVP-PERI (CORE_ADV (NUC_ADV (ADV <>)))))
4	convenes	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (V <>)))))
5	only	15	(CLAUSE-PERI* (ADVP-PERI (CORE_ADV (NUC_ADV (ADV <>)))))
6	when	15	(CLAUSE-PERI* (CLM <>))
7	a	8	(NP* (OP-DEF <>))
8	change	15	(NP (CORE_N (NUC_N (N <>)) (PP )))
9	in	8	(PP (P <>) (NP ))
10	the	11	(NP* (OP-DEF <>))
11	economy	14	(NP* (NPIP (NP (CORE_N (NUC_N (N <>))))))
12	's	11	(NP* (POS <>))
13	general	14	(CORE_N* (AP-PERI (CORE_A (NUC_A (A <>)))))
14	course	9	(NP (CORE_N (NUC_N (N <>))))
15	seems	4	(CORE* (CLAUSE-PERI (CORE (NP ) (NUC (V <>)))))
16	likely	15	(NUC* (AP (CORE_A (NUC_A (A <>)))))
17	.	0	(SENTENCE (. <>))