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Automatic Classification of Swedish Metadata Using dewey decimal Classification:A Comparison of Approaches

Journal of data and Information Science 2020年第1期5卷 18-38页

作者： Koraljka Golub Johan Hagelback Anders Ardo department of Cultural Sciences Faculty of Arts and HumanitiesLinnaeus UniversityVaxjoSweden department of Computer Science and Media Technology Faculty of TechnologyLinnaeus UniversityKalmarSweden department of Electrical and Information Technology Lund UniversityLundSweden

Purpose:With more and more digital collections of various information resources becoming available,also increasing is the challenge of assigning subject index terms and classes from quality knowledge organization *** the ultimate purpose is to understand the value of automatically produced dewey decimal Classification(ddC)classes for Swedish digital collections,the paper aims to evaluate the performance of six machine learning algorithms as well as a string-matching algorithm based on characteristics of ***/methodology/approach:State-of-the-art machine learning algorithms require at least 1,000 training examples per *** complete data set at the time of research involved 143,838 records which had to be reduced to top three hierarchical levels of ddC in order to provide sufficient training data(totaling 802 classes in the training and testing sample,out of 14,413 classes at all levels).Findings:Evaluation shows that Support Vector Machine with linear kernel outperforms other machine learning algorithms as well as the string-matching algorithm on average;the string-matching algorithm outperforms machine learning for specific classes when characteristics of ddC are most suitable for the *** embeddings combined with different types of neural networks(simple linear network,standard neural network,1 d convolutional neural network,and recurrent neural network)produced worse results than Support Vector Machine,but reach close results,with the benefit of a smaller representation *** of features in machine learning shows that using keywords or combining titles and keywords gives better results than using only titles as *** only marginally improves the *** stop-words reduced accuracy in most cases,while removing less frequent words increased it *** greatest impact is produced by the number of training examples:81.90%accuracy on the training set is achieved when at least 1,000 records per class are available

关键词： LIBRIS dewey decimal Classification Automatic classification Machine learning Support Vector Machine Multinomial Naive Bayes Simple linear network Standard neural network 1d convolutional neural network Recurrent neural network Word embeddings String matching

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