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The repository contains scripts that help to convert Discourse Representation Structures (DRSs) into Graph formatted as JSON, the format adopted at the MRP shared task, and back from the graph to DRS.

Convert DRSs from the Clausal Form (CLF) to Discourse Representation Graphs (DRG)

clf2graph.py supports different types of conversion depending on how to represent concept or role clauses (labelled node vs labelled edge), where to place role nodes (between vs as a parent of arguments), and whether to label argument edges (with vs without ARG[12]).

Supported conversion parameters

  • -ce treat concepts as labelled edges, otherwise as labelled nodes (default)
  • -rle treat roles as unlabeled nodes with ingoing labelled edges, otherwise as labelled nodes (default)
  • -rmid place roles between their arguments, otherwise as a parent of its arguments (default)
  • -noarg don't place ARGn labelled or argument edges, otherwise place them (default)
  • -bm [all arg1 role a1] box membership (bm) representation modes:
    • all bm edges are present;
    • bm edges are kept for roles but omitted for role arguments if both arguments (excepy constants) have the same membership as their role;
    • arg1 bm edges are kept, but removed for its role if arg1 has only that bm edge what its role has.
    • a1 further develops arg1 and also omits the bm edge for arg2 if the latter has bm edge for the same box as arg1 and teh role.

CLF ↦ MRP DRG

For example, the DRGs used in the MRP shared task are produced with (using a sample DRS):

./clf2graph.py --input test_suite/crops/crops.clf --raw test_suite/crops/crops.raw --output test_suite/crops/crops.mrp -noarg -rmid -bm arg1 --sig clf_signature.yaml

Note that with this particular combination of parameters, some CLFs might not be convertible as the conversion assumes a single (maximally specific) concept per discourse referent.

MRP DRG ↦ CLF

Clausal forms can be recovered from MRP DRGs by:

./mrp2clf.py --mrp test_suite/crops/crops.mrp --clf test_suite/crops/crops.mrp.clf --sig clf_signature.yaml

Requirements

Python 3