---
tags:
- text-2-text-generation
- plbart
license: apache-2.0
---

# Model Card for plbart-java-cs
 
# Model Details
 
## Model Description
 
The PLBART model was proposed in Unified Pre-training for Program Understanding and Generation 
 
- **Developed by:** UCLA NLP
- **Shared by [Optional]:** Peerapong C.

- **Model type:** Text2Text Generation
- **Language(s) (NLP):** More information needed
- **License:** Apache 2.0
- **Parent Model:** bert-base-multilingual-uncased
- **Resources for more information:**
   - [Associated Paper](https://arxiv.org/abs/2103.06333)
   - [Model Documentation](https://huggingface.co/docs/transformers/model_doc/plbart)


# Uses
 

## Direct Use
This model can be used for the task of Text2Text Generation
 
## Downstream Use [Optional]
 
More information needed.
 
## Out-of-Scope Use
 
The model should not be used to intentionally create hostile or alienating environments for people. 
 
# Bias, Risks, and Limitations
 
 
Significant research has explored bias and fairness issues with language models (see, e.g., [Sheng et al. (2021)](https://aclanthology.org/2021.acl-long.330.pdf) and [Bender et al. (2021)](https://dl.acm.org/doi/pdf/10.1145/3442188.3445922)). Predictions generated by the model may include disturbing and harmful stereotypes across protected classes; identity characteristics; and sensitive, social, and occupational groups.



## Recommendations
 
 
Users (both direct and downstream) should be made aware of the risks, biases and limitations of the model. More information needed for further recommendations.

# Training Details
 
## Training Data
 
More information needed 
 
## Training Procedure

 
### Preprocessing
 
The model creators note in the [associated paper](https://arxiv.org/pdf/2103.06333.pdf)
> We tokenize all the data with a sentencepiece model (Kudo and Richardson, 2018) learned on 1/5’th of the pre-training data. We train sentencepiece to learn 50,000 subword tokens. One key challenge to aggregate data from different modalities is that some modalities may have more data, such as we have 14 times more data in PL than NL. Therefore, we mix and up/down sample the data following Conneau and Lample (2019) to alleviate the bias towards PL.
 
 


 
### Speeds, Sizes, Times
The model creators note in the [associated paper](https://arxiv.org/pdf/2103.06333.pdf):
> The effective batch size is maintained at 2048 instances.

 
# Evaluation
 
 
## Testing Data, Factors & Metrics
 
### Testing Data
 
 The model creators note in the [associated paper](https://arxiv.org/pdf/2103.06333.pdf):
>CodeXGLUE (Lu et al., 2021) provided public dataset and corresponding train validation-test splits for all the tasks
 
 
### Factors
More information needed
 
### Metrics
 
More information needed
 
 
## Results 
 
More information needed

 
# Model Examination
 
More information needed
 
# Environmental Impact
 
Carbon emissions can be estimated using the [Machine Learning Impact calculator](https://mlco2.github.io/impact#compute) presented in [Lacoste et al. (2019)](https://arxiv.org/abs/1910.09700).
 
- **Hardware Type:** More information needed
- **Hours used:** More information needed
- **Cloud Provider:** More information needed
- **Compute Region:** More information needed
- **Carbon Emitted:** More information needed
 
# Technical Specifications [optional]
 
## Model Architecture and Objective
 The model creators note in the [associated paper](https://arxiv.org/pdf/2103.06333.pdf):
> PLBart is a multilingual encoder-decoder (sequence-to-sequence) model primarily intended for code-to-text, text-to-code, code-to-code tasks. As the model is multilingual it expects the sequences in a different format. A special language id token is added in both the source and target text. The source text format is X [eos, src_lang_code] where X is the source text. 
 
## Compute Infrastructure
  The model creators note in the [associated paper](https://arxiv.org/pdf/2103.06333.pdf):
> PLBART uses the same architecture as BARTbase (Lewis et al., 2020), it uses the sequence-to-sequence Transformer architecture (Vaswani et al., 2017), with 6 layers of encoder and 6 layers of decoder with model dimension of 768 and 12 heads (∼140M parameters). The only exception is, we include an additional layer normalization layer on top of both the encoder and decoder following Liu et al. (2020),
 
### Hardware
 
 
More information needed
 
### Software
 
More information needed.
 
# Citation

 
**BibTeX:**
 
 
```bibtex
@misc{https://doi.org/10.48550/arxiv.2103.06333,
  doi = {10.48550/ARXIV.2103.06333},
  
  url = {https://arxiv.org/abs/2103.06333},
  
  author = {Ahmad, Wasi Uddin and Chakraborty, Saikat and Ray, Baishakhi and Chang, Kai-Wei},
  
  keywords = {Computation and Language (cs.CL), Programming Languages (cs.PL), FOS: Computer and information sciences, FOS: Computer and information sciences},
  
  title = {Unified Pre-training for Program Understanding and Generation},
  
  publisher = {arXiv},
  
  year = {2021},
  
  copyright = {arXiv.org perpetual, non-exclusive license}
}

```

 
# Glossary [optional]
 
 The model creators note in the [associated paper](https://arxiv.org/pdf/2103.06333.pdf):
 
> CodeBLEU is a metric for measuring the quality of the synthesized code (Ren et al., 2020). Unlike BLEU, CodeBLEU also considers grammatical and logical correctness based on the abstract syntax tree and the data-flow structure.



# More Information [optional]
More information needed 

 
# Model Card Authors [optional]
 
UCLA NLP in collaboration with Ezi Ozoani and the Hugging Face team


# Model Card Contact
 
More information needed
 
# How to Get Started with the Model
 
Use the code below to get started with the model.
 
<details>
<summary> Click to expand </summary>

```python
from transformers import AutoTokenizer, AutoModelForSeq2SeqLM

tokenizer = AutoTokenizer.from_pretrained("uclanlp/plbart-java-cs")

model = AutoModelForSeq2SeqLM.from_pretrained("uclanlp/plbart-java-cs")
 ```
</details>