Abstract
Abstract Semantic portals are characterized for storing and structuring content according to specific domain ontologies. This content is represented through ontological languages, which enable not only adding semantic value to information treatment, but also inferring new knowledge from it. Publication in a semantic portal is typically done by instantiating its ontology, and this is often performed manually or through the use of specific forms. However, in order to keep portals constantly up-to-date, it is necessary to provide means for a more dynamic publication, integrating the portal content with information retrieved from different ontology-based sites on the same or on complementary domains. Reusing information from different ontologies requires specific and efficient mechanisms to align them, taking into account syntactical and semantical conflicts. This paper proposes an extension of the Crosi Mapping System, a matching mechanism which calculates similarities between ontologies. Some of its original algorithms have been enriched with additional functionality. This extension, namede-CMS, has been evaluated using the OAEI ontology alignment benchmark, and results show an increase of 69% in alignment precision when compared to the CMS original version. In order to illustrate its use, thee-CMS strategy was applied to SiGePoS, a System for Generating Semantic Portals. The semantic module, one of the system components, implements the alignment mechanism between ontologies, which is performed by thee-CMS.
Highlights
Due to the heterogeneity and exponential growth of Web information, current traditional portals face difficulties in dealing with page maintenance
This work introduced extended CMS (e-CMS), an extension of the CMS mechanism for similarity calculation, used in the ontology matching process. e-CMS has been evaluated according to the benchmark proposed by the OAEI initiative
They showed that e-CMS presented very good results for recall when compared to original CMS, and better results, in most cases, for precision and recall when compared to CMS-StrutCano
Summary
Due to the heterogeneity and exponential growth of Web information, current traditional portals face difficulties in dealing with page maintenance. The multi-facet paradigm consists of a more flexible approach for organizing items in a Web site, i.e., instead of categorizing items in a single classification, they can be annotated into multiple facets simultaneously, according to their meaning[29] This idea has been largely explored in semantic portals[38], adding major benefits to their ontological structures and inference capacity. Some of the CMS original algorithms have been enriched with additional functionalities in order to provide better results within our system This extension, namely e-CMS, has been incorporated into a system that provides the basic infrastructure to dynamically generate content for a semantic portal, in order to enable integration, organization, and publication of information based on the intensive use of ontologies.
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