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7c5e40e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | """PropBank-style semantic-role label vocabulary for SRL supervision.
The relation space is *shared* with UD: UD deprels keep ids ``[0, NUM_DEPREL)``
(unchanged), and SRL roles occupy the contiguous block starting at ``SRL_BASE ==
NUM_DEPREL``. SRL losses operate on the ``edge_logits`` slice
``[SRL_BASE : SRL_BASE + NUM_SRL_ROLES]`` using **local** role ids ``[0,
NUM_SRL_ROLES)`` where local id 0 is ``NONE`` (this ordered pair is not an
argument edge). A model that does SRL therefore needs
``graph_relation_types >= RELATION_VOCAB_SIZE``.
"""
from __future__ import annotations
from strata.data.ud_labels import IGNORE_INDEX, NUM_DEPREL # noqa: F401 (re-export IGNORE_INDEX)
# local id 0 == NONE (no argument edge); remaining are PropBank roles.
SRL_ROLES: tuple[str, ...] = (
"NONE",
"ARG0", "ARG1", "ARG2", "ARG3", "ARG4", "ARG5", "ARGA",
"ARGM-TMP", "ARGM-LOC", "ARGM-MNR", "ARGM-CAU", "ARGM-DIS", "ARGM-ADV",
"ARGM-MOD", "ARGM-NEG", "ARGM-PRP", "ARGM-DIR", "ARGM-EXT", "ARGM-PRD",
"ARGM-GOL", "ARGM-COM", "ARGM-REC", "ARGM-LVB", "ARGM-OTHER", "ARG-OTHER",
)
SRL_ROLE_TO_LOCAL: dict[str, int] = {role: i for i, role in enumerate(SRL_ROLES)}
NONE_LOCAL = 0
NUM_SRL_ROLES = len(SRL_ROLES)
SRL_BASE = NUM_DEPREL # offset into the shared relation vocabulary
RELATION_VOCAB_SIZE = SRL_BASE + NUM_SRL_ROLES
# Column markers in Universal Propositions role columns.
PREDICATE_MARKER = "V"
NO_ROLE = "_"
def srl_role_to_local(role: str) -> int:
"""Map a UP role string to a local SRL id (never ``NONE`` for a real role).
Continuation/reference prefixes (``C-`` / ``R-``) are dropped to their base;
unrecognised core / modifier roles fall back to generic buckets.
"""
r = role.strip().upper()
if r.startswith(("C-", "R-")):
r = r[2:]
if r in SRL_ROLE_TO_LOCAL and r != "NONE":
return SRL_ROLE_TO_LOCAL[r]
if r.startswith("ARGM"):
return SRL_ROLE_TO_LOCAL["ARGM-OTHER"]
if r.startswith("ARG"):
return SRL_ROLE_TO_LOCAL["ARG-OTHER"]
return SRL_ROLE_TO_LOCAL["ARG-OTHER"]
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