Keyword Search for Data-Centric XML Collections With Long Text Fields

Users who are unfamiliar with database query languages can search XML data sets using keyword queries. Current approaches for supporting such queries are either for text-centric XML, where the structure is very simple and long text fields predominate; or data-centric, where the structure is very rich. However, long text fields are becoming more common in data-centric XML, and existing approaches deliver relatively poor precision, recall, and ranking for such data sets. In this paper, the authors introduce an XML keyword search method that provides high precision, recall, and ranking quality for data-centric XML, even when long text fields are present.