Representing Time-dependent Information in Multidimensional XML

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 structure (e.g. that can exist in different languages or various degrees of detail). In this paper we show that MXML dimensions can be used to express time and associate it with XML elements and attributes. We discuss the properties of time domain and the features of MXML which are necessary in order to represent time, and give key points that motivate further investigation on the use of MXML for representing time-dependent data

Interoperability Between Archival and Bibliographic Metadata : An EAD to MODS Crosswalk

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 standards, namely the Encoded Archival Description (EAD) and the Metadata Object Description Schema (MODS). We propose a crosswalk between EAD and MODS consisting of three basic components: (a) a semantic mapping from EAD elements/attributes to MODS elements/attributes, (b) techniques to map the hierarchical structure of the EAD document to MODS, and (c) techniques to retain in MODS the information related to the archival components that is inherited from the descriptions of components of higher hierarchy in the EAD document. This is an electronic version of an article published in Lina Bountouri, Manolis Gergatsoulis. "Interoperability between archival and bibliographic metadata: an EAD to MODS crosswalk", Journal of Library Metadata, Vol. 9, No. 1, pages 98-133, 2009. Journal of Library Metadata is available online at: http://www.informaworld.com and the open URL for this article is http://www.informaworld.com/smpp/content~db=all~content=a914011347~frm=titlelink

Mapping VRA Core 4.0 to the CIDOC CRM ontology

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 acts as a mediation schema. More speci cally, each element of the schema (along with its subelements and attributes) is mapped to the equivalent CRM path (represented as a sequence of classes and properties). The mapping is formally described using a Mapping Description Language (MDL), which explicitly de fines semantic rules from the source schema to the target schema