Carmen Moraga Maria Ángeles Moraga Coral Calero Angelica Caro Towards the Discovery of Data Quality Attributes for Web Portals. 251-259 2009 ICWE http://dx.doi.org/10.1007/978-3-642-02818-2_20 conf/icwe/2009 db/conf/icwe/icwe2009.html#MoragaMCC09