Authors:
Maria Helena Franciscatto
1
;
Marcos Didonet Del Fabro
1
;
Luis Carlos Erpen de Bona
1
;
Celio Trois
2
and
Hegler Tissot
3
Affiliations:
1
Department of Informatics, Federal University of Paraná, Curitiba, Brazil
;
2
Technology Center, Federal University of Santa Maria, Santa Maria, Brazil
;
3
Drexel University, Philadelphia, U.S.A.
Keyword(s):
Source Discovery, Open Data, LDA, Word2Vec, Cosine Similarity, Machine Learning.
Abstract:
Source discovery aims to facilitate the search for specific information, whose access can be complex and dependent on several distributed data sources. These challenges are often observed in Open Data, where users experience lack of support and difficulty in finding what they need. In this context, Source Discovery tasks could enable the retrieval of a data source most likely to contain the desired information, facilitating Open Data access and transparency. This work presents an approach that blends Latent Dirichlet Allocation (LDA), Word2Vec, and Cosine Similarity for discovering the best open data source given a user query, supported by joint union of the methods’ semantic and syntactic capabilities. Our approach was evaluated on its ability to discover, among eight candidates, the right source for a set of queries. Three rounds of experiments were conducted, alternating the number of data sources and test questions. In all rounds, our approach showed superior results when compare
d with the baseline methods separately, reaching a classification accuracy above 93%, even when all candidate sources had similar content.
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