BERT-DST
The code has been tested with Python 3 and PyTorch 1.5.0. Note that the code in the folder pytorch_pretrained_bert was originally from the Hugging Face team. With minor modifications, you can use the latest version of huggingface/transformers.
Commands
An example training command (using BERT-Base) is:
python main.py --do_train --data_dir=data/woz/ --bert_model=bert-base-uncased --output_dir=outputs
An example training command (using BERT-Large) is:
python main.py --do_train --data_dir=data/woz/ --bert_model=bert-large-uncased --output_dir=outputs
Results
The table below shows the results on the WoZ restaurant reservation datasets.
| Model | Joint Goal (WoZ) | Turn Request (WoZ) |
|---|---|---|
| Neural Belief Tracker - DNN | 84.4% | 91.2% |
| Neural Belief Tracker - CNN | 84.2% | 91.6% |
| GLAD | 88.1 ± 0.4% | 97.1 ± 0.2% |
| Simple BERT Model (BERT-Base) | 90.5% | 97.6% |
Simple BERT Model
The figure below shows the architecture of the simple BERT Model.
Please cite our related paper A Simple but Effective BERT Model for Dialog State Tracking on Resource-Limited Systems if you find this useful.