XML-to-SQL Query Translation Literature: The State of the Art and Open Problems

Recently, the database research literature has seen an explosion of publications with the goal of using an RDBMS to store and/or query XML data. The problems addressed and solved in this area are diverse. This diversity renders it difficult to know how the various results presented fit together, and even makes it hard to know what open problems remain. As a first step to rectifying this situation, the paper presents a classification of the problem space and discusses how almost 40 papers fit into this classification. As a result of this study, they find that some basic questions are still open.