Browsing Βιβλιοθηκονομία και Επιστήμη της Πληροφόρησης / Library and Information Science by Author "Γεργατσούλης, Μανώλης"
Now showing items 1-20 of 40
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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 ... -
The branching-time transformation technique for Chain Datalog programs
(2001)The branching-time transformation technique has proven to be an efficient approach for implementing functional programming languages. In this paper we demonstrate that such a technique can also be defined for logic programming ... -
Defining a semantic mapping of VRA Core 4.0 to the CIDOC conceptual reference model
(2012)In the recent decades, we have witnessed a tremendous proliferation of metadata schemas, particularly in the cultural heritage domain. As a consequence, cultural heritage communities face a growing need to integrate these ... -
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 ... -
Finding equivalent rewritings in the presence of arithmetic comparisons
(2006)The problem of rewriting queries using views has received significant attention because of its applications in a wide variety of data-management problems. For select-project-join SQL (a.k.a. conjunctive) queries and views, ... -
Incorporating dimensions in XML and DTD
(2001)In this,paper we investigate various aspects of representing multidimensional information in the frame of the WWW. Multidimensional XML (MXML) is an extension of XML suitable for representing data that assume different ... -
Integrating Dublin Core metadata for cultural heritage collections using ontologies
(2007)Metadata interoperability is an active research area, especially for cultural heritage collections, which consist of heterogeneous objects described by a variety of metadata schemas. In this paper we propose an ontology-based ... -
Interoperability Between Archival and Bibliographic Metadata: an EAD to MODS Crosswalk
(2009)In this article we investigate the problem of semantic interoperability between archival and bibliographic metadata used in digital libraries and repositories. We investigate the semantic relationships between two metadata ... -
Linearisability on datalog programs
(2003)Linear Datalog programs are programs whose clauses have at most one intensional atom in their bodies. We explore syntactic classes of Datalog programs (syntactically non-linear) which turn out to express no more than the ... -
Mapping cultural metadata schemas to CIDOC conceptual reference model
(2010)Managing heterogeneous data is a challenge for cultural heritage institutions as they host and develop various collections with heterogeneous types of material, described by different metadata schemas. In this paper, we ... -
Mapping Encoded Archival Description to CIDOC CRM.
(2011)In this paper we analyze the semantics of the archival description, expressed through the Encoded Archival Description. Through this analysis it is concluded that an EAD document is a hierarchy of documentation elements ... -
Mapping the Hierarchy of EAD to VRA Core 4.0 Through CIDOC CRM
(2016)Metadata interoperability requires the development of mappings and crosswalks between different schemas. Crosswalks development is a laborious and complex task especially when metadata of compound objects include hierarchical ... -
Mapping VRA Core 4.0 to the CIDOC CRM ontology
(2011)In this paper, we present an e ffort to semantically map VRA Core 4.0, a cultural heritage metadata schema describing visual resources, to CIDOC CRM. This work is based on a semantic integration scenario, where CIDOC CRM ... -
Modelling the Public Sector Information through CIDOC Conceptual Reference Model
(2010)Nowadays, due to the growing development of eGovernment information systems, there is an increasing need to handle Public Sector Information (PSI) in a homogeneous way. Ontologies are currently a powerful tool to act as ... -
Multidimensional RDF
(2005)RDF has been proposed by W3C as a metadata model and language for representing information about resources in WWW. In this paper we introduce Multidimensional RDF (or MRDF), as an extension of RDF, suitable for representing ... -
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 ... -
MXML Storage and the Problem of Manipulation of Context
(2011)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 represent- ing data that assume different ... -
On rewriting Xpath Queries Using Views
(2009)The problem of rewriting a query using a materialized view is studied for a well known fragment of XPath that includes the following three constructs: wildcards, descendant edges and branches. In earlier work, determining ... -
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 ... -
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 ...
