datasets:
- eduagarcia/LegalPT
- eduagarcia/cc100-pt
- eduagarcia/OSCAR-2301-pt_dedup
- eduagarcia/brwac_dedup
language:
- pt
pipeline_tag: fill-mask
tags:
- legal
model-index:
- name: RoBERTaLexPT-base
results:
- task:
type: token-classification
dataset:
type: eduagarcia/portuguese_benchmark
name: LeNER
config: LeNER-Br
split: test
metrics:
- type: seqeval
value: 90.73
name: Mean F1
args:
scheme: IOB2
- task:
type: token-classification
dataset:
type: eduagarcia/portuguese_benchmark
name: UlyNER-PL Coarse
config: UlyssesNER-Br-PL-coarse
split: test
metrics:
- type: seqeval
value: 88.56
name: Mean F1
args:
scheme: IOB2
- task:
type: token-classification
dataset:
type: eduagarcia/portuguese_benchmark
name: UlyNER-PL Fine
config: UlyssesNER-Br-PL-fine
split: test
metrics:
- type: seqeval
value: 86.03
name: Mean F1
args:
scheme: IOB2
license: cc-by-4.0
metrics:
- seqeval
RoBERTaLexPT-base
RoBERTaLexPT-base is pretrained from LegalPT corpus and CrawlPT corpus, using RoBERTa-base, introduced by Liu et al. (2019).
Model Details
Model Description
- Funded by: [More Information Needed]
- Language(s) (NLP): Brazilian Portuguese (pt-BR)
- License: Creative Commons Attribution 4.0 International Public License
Model Sources
- Repository: https://github.com/eduagarcia/roberta-legal-portuguese
- Paper: [More Information Needed]
Training Details
Training Data
RoBERTaLexPT-base is pretrained from both data:
- LegalPT is a Portuguese legal corpus by aggregating diverse sources of up to 125GiB data.
- CrawlPT is a duplication of three Portuguese general corpora: brWaC, CC100-PT, OSCAR-2301.
Training Procedure
Our pretraining process was executed using the Fairseq library on a DGX-A100 cluster, utilizing a total of 2 Nvidia A100 80 GB GPUs. The complete training of a single configuration takes approximately three days.
This computational setup is similar to the work of BERTimbau, exposing the model to approximately 65 billion tokens during training.
Preprocessing
Following the approach of Lee et al. (2022), we deduplicated all subsets of the LegalPT Corpus using the MinHash algorithm and Locality Sensitive Hashing to find clusters of duplicate documents.
To ensure that domain models are not constrained by a generic vocabulary, we utilized the HuggingFace Tokenizers -- BPE algorithm to train a vocabulary for each pre-training corpus used.
Training Hyperparameters
The pretraining process involved training the model for 62,500 steps, with a batch size of 2048 sequences, each containing a maximum of 512 tokens. We employed the masked language modeling objective, where 15% of the input tokens were randomly masked. The optimization was performed using the AdamW optimizer with a linear warmup and a linear decay learning rate schedule.
We adopted the standard RoBERTa hyperparameters:
| Hyperparameter | RoBERTa-base |
|---|---|
| Number of layers | 12 |
| Hidden size | 768 |
| FFN inner hidden size | 3072 |
| Attention heads | 12 |
| Attention head size | 64 |
| Dropout | 0.1 |
| Attention dropout | 0.1 |
| Warmup steps | 6k |
| Peak learning rate | 4e-4 |
| Batch size | 2048 |
| Weight decay | 0.01 |
| Maximum training steps | 62.5k |
| Learning rate decay | Linear |
| AdamW $$\epsilon$$ | 1e-6 |
| AdamW $$\beta_1$$ | 0.9 |
| AdamW $$\beta_2$$ | 0.98 |
| Gradient clipping | 0.0 |
Evaluation
Testing Data, Factors & Metrics
Testing Data
The model was evaluated on "PortuLex" benchmark, a four-task benchmark designed to evaluate the quality and performance of language models in the Portuguese legal domain.
Metrics
[More Information Needed]
Results
[More Information Needed]
Summary
Citation
[More Information Needed]