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MatchGPT

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This repository contains code and extensive prompt examples to reproduce and extend the experiments in our papers "Using ChatGPT for Entity Matching" and "Entity Matching using Large Language Models".

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[Entity Matching](https://paperswithcode.com/task/entity-resolution) is the task of deciding whether two entity descriptions refer to the same real-world entity. Entity matching methods often rely on fine-tuning Transformer models such as BERT or RoBERTa. We have investigated using [Large Language Models](https://en.wikipedia.org/wiki/Large_language_model) for entity matching as a more robust, training data-efficient alternative to traditional Transformer models. We present our results in the two papers listed below. This repository contains the code and the datasets to reproduce and extend the experiments that we present in the two papers:

1. [**Using ChatGPT for Entity Matching**](https://arxiv.org/abs/2305.03423) published in the proceedings of the [ADBIS2023](https://www.essi.upc.edu/dtim/ADBIS2023/) conference. The code, datasets, and additional information about the experiments presented in the paper are available in the [ChatForEM](https://github.com/wbsg-uni-mannheim/MatchGPT/tree/main/ChatForEM) sub-repository.

2. [**Entity Matching using Large Language Models**](https://arxiv.org/abs/2310.11244) extends the work of the first paper by increasing the number and size of datasets as well as using more recent LLMs, including a comparison of hosted LLMs like GPT4 and open-source LLMs based on Llama2 that can be run locally. We also experiment with fine-tuning ChatGPT for entity matching. Additional information about the experiments, datasets, and code are available in the [LLMForEM](https://github.com/wbsg-uni-mannheim/MatchGPT/tree/main/LLMForEM) sub-repository.

MatchGPT

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