Challenge: Existing approaches to extract value from product data for a large number of attributes are not effective for rare and ambiguous attributes.
Approach: They propose to use attributes as knowledge to expand AVE queries by retrieving possible answers from training data.
Outcome: The proposed model improves on a cleaned version of AliExpress dataset for rare and ambiguous attributes, especially for rare attributes.

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Challenge: Existing methods for AVE are limited on rare attributes due to poor generalization ability.
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Challenge: scalability of attribute-value extraction (AVE) task is key for a large number of products . a question-answering (QA)-based approach is better for AVE, but requires a larger number of classes to be scalable.
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Challenge: Existing models for attribute value extraction struggle for parameter efficiency and reliability due to data contamination and catastrophic forgetting.
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Challenge: Query Attribute Understanding (QAU) is a sub-component of QU that involves extracting named attributes from user queries.
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Large Scale Generative Multimodal Attribute Extraction for E-commerce Attributes (2023.acl-industry)

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Challenge: E-commerce websites often don’t label or mislabel attributes of products .
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TXtract: Taxonomy-Aware Knowledge Extraction for Thousands of Product Categories (2020.acl-main)

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Challenge: Recent studies show that using large language models (LLMs) is the most reliable method to evaluate QA models, but suffers from limited interpretability, high cost, and environmental harm.
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