Incorporating Word Embeddings into Open Directory Project based Large-scale Classification

TL;DR

This paper enhances large-scale text classification by integrating word embeddings with the Open Directory Project, creating semantic category representations that significantly improve classification performance.

Contribution

It introduces a novel method to incorporate word embeddings into ODP-based classification, generating category vectors and a new similarity measure for improved accuracy.

Findings

10% improvement in macro-averaged F1-score

28% increase in precision at k

Effective large-scale classification performance enhancement

Abstract

Recently, implicit representation models, such as embedding or deep learning, have been successfully adopted to text classification task due to their outstanding performance. However, these approaches are limited to small- or moderate-scale text classification. Explicit representation models are often used in a large-scale text classification, like the Open Directory Project (ODP)-based text classification. However, the performance of these models is limited to the associated knowledge bases. In this paper, we incorporate word embeddings into the ODP-based large-scale classification. To this end, we first generate category vectors, which represent the semantics of ODP categories by jointly modeling word embeddings and the ODP-based text classification. We then propose a novel semantic similarity measure, which utilizes the category and word vectors obtained from the joint model and word embeddings, respectively. The evaluation results clearly show the efficacy of our methodology in large-scale text classification. The proposed scheme exhibits significant improvements of 10% and 28% in terms of macro-averaging F1-score and precision at k, respectively, over state-of-the-art techniques.