Query Rewriting over Generalized XML Security Views

Kuper, Gabriel and Massacci, Fabio and Rassadko, Nataliya (2005) Query Rewriting over Generalized XML Security Views. UNSPECIFIED. (Unpublished)

Download (252Kb) | Preview


    We investigate the experimental effectiveness of XML security views. Our model consists of access control policies specified over DTDs with XPath expression for data-dependent access control policies. We provide the notion of security views for characterizing information accessible to authorized users. This is a transformed (sanitized) DTD schema that is used by users for query formulation. To avoid the overhead of view materialization in query answering, these queries later undergo rewriting so that they are valid over the original DTD schema, and thus the query answer is computed from the original XML data. We provide an algorithm for query rewriting and show its performance compared with the naive approach, i.e. the approach that requires view materialization.

    Item Type: Departmental Technical Report
    Department or Research center: Information Engineering and Computer Science
    Subjects: Q Science > QA Mathematics > QA076 Data Base Management
    Uncontrolled Keywords: Query rewriting, XML database, security views
    Report Number: DIT-05-060
    Repository staff approval on: 28 Apr 2006

    Actions (login required)

    View Item