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README.md
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### Training Data
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For building the pre-training corpus of Indian legal text, we collected a large corpus of case documents from the Indian Supreme Court and many High Courts of India.
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These documents were collected from diverse publicly available sources on the Web, such as official websites of these courts (e.g., [the website of the Indian Supreme Court](https://main.sci.gov.in/)), the erstwhile website of the Legal Information Institute of India,
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the popular legal repository [IndianKanoon](https://www.indiankanoon.org), and so on.
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The court cases in our dataset range from 1950 to 2019, and belong to all legal domains, such as Civil, Criminal, Constitutional, and so on.
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Additionally, we collected 1,113 Central Government Acts, which are the documents codifying the laws of the country. Each Act is a collection of related laws, called Sections. These 1,113 Acts contain a total of 32,021 Sections.
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In total, our dataset contains around 5.4 million Indian legal documents (all in the English language).
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The raw text corpus size is around 27 GB.
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### Training Objective
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This model is initialized with the [Legal-BERT model](https://huggingface.co/zlucia/legalbert) from the paper [When does pretraining help?: assessing self-supervised learning for law and the CaseHOLD dataset of 53,000+ legal holdings](https://dl.acm.org/doi/abs/10.1145/3462757.3466088). In our work, we refer to this model as CaseLawBERT, and our re-trained model as InCaseLawBERT.
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### Usage
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Using the tokenizer (same as [CaseLawBERT](https://huggingface.co/zlucia/legalbert))
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from transformers import AutoModel
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model = AutoModel.from_pretrained("law-ai/InCaseLawBERT")
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```
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Using the model for further pre-training with MLM and NSP
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```python
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from transformers import BertForPreTraining
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model_with_pretraining_heads = BertForPreTraining.from_pretrained("law-ai/InCaseLawBERT")
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```
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###
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### Training Data
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For building the pre-training corpus of Indian legal text, we collected a large corpus of case documents from the Indian Supreme Court and many High Courts of India.
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The court cases in our dataset range from 1950 to 2019, and belong to all legal domains, such as Civil, Criminal, Constitutional, and so on.
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In total, our dataset contains around 5.4 million Indian legal documents (all in the English language).
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The raw text corpus size is around 27 GB.
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### Training Objective
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This model is initialized with the [Legal-BERT model](https://huggingface.co/zlucia/legalbert) from the paper [When does pretraining help?: assessing self-supervised learning for law and the CaseHOLD dataset of 53,000+ legal holdings](https://dl.acm.org/doi/abs/10.1145/3462757.3466088). In our work, we refer to this model as CaseLawBERT, and our re-trained model as InCaseLawBERT.
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We further train this model on our data for 300K steps on the Masked Language Modeling (MLM) and Next Sentence Prediction (NSP) tasks.
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### Model Overview
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This model has the same configuration as the [bert-base-uncased model](https://huggingface.co/bert-base-uncased):
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12 hidden layers, 768 hidden dimensionality, 12 attention heads, ~110M parameters.
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### Usage
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Using the tokenizer (same as [CaseLawBERT](https://huggingface.co/zlucia/legalbert))
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from transformers import AutoModel
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model = AutoModel.from_pretrained("law-ai/InCaseLawBERT")
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```
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### Fine-tuning Results
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### Citation
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```
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@inproceedings{paul-2022-ptinlegal,
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title = "Pre-training Transformers on Indian Legal Text",
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author = "Paul, Shounak and
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Mandal, Arpan and
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Goyal, Pawan and
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Ghosh, Saptarshi",
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eprinttype = {arXiv}
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}
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```
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### About Us
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We are a group of researchers from the Department of Computer Science and Technology, Indian Insitute of Technology, Kharagpur.
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Our research interests are primarily ML and NLP applications for the legal domain, with a special focus on the challenges and oppurtunites for the Indian legal scenario.
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We have, and are currently working on several legal tasks such as:
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* named entity recognition, summarization of legal documents
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* semantic segmentation of legal documents
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* legal statute identification from facts, court judgment prediction
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* legal document matching
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You can find our publicly available codes and datasets [here](https://github.com/Law-AI)
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