🦌 DEER: DEcoder-Embedding based Relational KGC/Probe

⚠️ This project is still under development, there will likely be disruptive changes in the future.

DEER (DEcoder-Embedding-based Relational KGC) is an encoder-based KGC model that utilizes embedding vectors acquired from a generative PLM. Unlike traditional encoder-based methods, DEER retains in-context learning capabilities while avoiding the slow inference of decoder-based approaches.

🧪 Installation

pip install deer-probe

🤗 Simple Knowledge Probe

from deer.utils import knowledge_probe

triplets: List[Tuple[str, str, str]] = [('subject 1', 'predicate 1', 'object 1'), ('subject 2', 'predicate 2', 'object 2')]
entity_id2text: Dict[str, str] = {'subject 1': 'entity 1', 'subject 2': 'entity 2', 'object 1': 'entity 3', 'object 2': 'entity 4'}
relation_id2text: Dict[str, str] = {'predicate 1': 'relation 1', 'predicate 2': 'relation 2'}
fewshot_prompt = '(subject 0, predicate 0, object 0)'
entity_id2definition = {'subject 1': 'definition 1', 'subject 2': 'definition 2', 'object 1': 'definition 3', 'object 2': 'definition 4'}

results: dict[str, float] = knowledge_probe(triplets, entity_id2text, relation_id2text, entity_id2definition, fewshot_prompt, 'facebook/opt-125m', False)
print(results)

Output

{'Mean Rank': 2.5, 'Mean Reciprical Rank': 0.41666666666666663, 'Hit@1': 0.0, 'Hit@5': 1.0, 'Hit@10': 1.0}

🏴‍☠️ Hackable Knowledge Probe

from typing import Dict, List, Tuple
from unittest import TestCase, main
from deer.encoder_model import PromptEOL_Encoder
from deer.prompt_templates import query2prompts, tail_entities2prompts
from deer.post_processing import compute_target_tail_indecies, compute_target_tail_ranks, compute_metrics
from deer.utils import save_encodings

triplets: List[Tuple[str, str, str]] = [('subject 1', 'predicate 1', 'object 1'), ('subject 2', 'predicate 2', 'object 2')]
entity_id2text: Dict[str, str] = {'subject 1': 'entity 1', 'subject 2': 'entity 2', 'object 1': 'entity 3', 'object 2': 'entity 4'}
relation_id2text: Dict[str, str] = {'predicate 1': 'relation 1', 'predicate 2': 'relation 2'}
fewshot_prompt = '(subject 0, predicate 0, object 0)'
encoder = PromptEOL_Encoder('facebook/opt-125m', cuda=False)
entity_id2definition = {'subject 1': 'definition 1', 'subject 2': 'definition 2', 'object 1': 'definition 3', 'object 2': 'definition 4'}

query_prompts = query2prompts(triplets,
            entity_id2text,
            relation_id2text, 
            fewshot_prompt = fewshot_prompt,
            entity_id2definition = entity_id2definition)
query_encodings = encoder(query_prompts)

tail_prompts = tail_entities2prompts(list(entity_id2text.values()), list(entity_id2definition.values())) 
tail_encodings = encoder(tail_prompts)

save_encodings(query_encodings, 'query_encodings.torch')
save_encodings(tail_encodings, 'tail_encodings.torch')

target_tail_indecies:List[int] = compute_target_tail_indecies(triplets, list(entity_id2text.keys()))
target_tail_ranks: List[int] = compute_target_tail_ranks(query_encodings, tail_encodings, target_tail_indecies)
results: dict[str, float] = compute_metrics(target_tail_ranks)
print(results)

Output

{'Mean Rank': 2.5, 'Mean Reciprical Rank': 0.41666666666666663, 'Hit@1': 0.0, 'Hit@5': 1.0, 'Hit@10': 1.0}