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A transformation technique for datalog programs based on non-deterministic constructs
(2001)
Recently, a novel transformation technique for Datalog programs, called the branching-time transformation, was introduced by the authors. In this paper we propose a significant extension of the branching-time transformation ...
Storing multidimensional XML documents in relational databases
(2007)
The problem of storing and querying XML data using relational databases has been considered a lot and many techniques have been developed. MXML is an extension of XML suitable for representing data that assume different ...
Multidimensional XPath
(2008)
In Web applications it is often required to manipulate information of semistructured nature, which may present variations according to different circumstances. Multidimensional XML (MXML) is an extension of XML suitable ...
View selection for real conjunctive queries
(2007)
Given a query workload, a database and a set of constraints, the view-selection
problem is to select views to materialize so that the constraints are satisfied and the views
can be used to compute the queries in the workload ...
Ontology-Based Metadata Integration in the Cultural Heritage Domain
(2007)
In this paper, we propose an ontology-based metadata integration methodology for the cultural heritage domain. The proposed real - world approach considers an integration architecture in which CIDOC/CRM ontology acts as a ...
On solving efficiently the view selection problem under bag-semantics
(2009)
In this paper, we investigate the problem of view selection for workloads of conjunctive queries under bag semantics. In particular we aim to limit the search space of candidate viewsets. In that respect we start delineating ...
Representing time-dependent information in multidimensional XML
(2001)
Multidimensional XML (MXML) is an extension of XML that incorporates dimensions in order to represent in an elegant and concise way context-dependent data, that is, data which can exhibit different variations in value or ...
Automatic Generation of Crosswalks through CIDOC CRM
(2012)
In this paper, we propose an algorithm that automatically generates crosswalks between metadata schemas. The algorithm exploits the mappings between the schemas and the CIDOC Conceptual Reference Model (CRM), defined as ...
Designing views to efficiently answer real SQL queries
(2005)
The problem of optimizing queries in the presence of materialized views and the related view-design problem have recently attracted a lot of attention. Significant research results have been reported, and materialized views ...
Representing changes in XML documents using dimensions
(2003)
In this paper, we present a method for representing the history of XML documents using Multidimensional XML (MXML). We demonstrate how a set of basic change operations on XML documents can be represented in MXML, and show ...