International Journal of Metadata, Semantics and Ontologies (IJMSO) Special Issue on Search using Metadata, Semantic, and Ontologies The objective of this special issue is to collect and report on recent high quality research that enables the search of artifacts like documents, resources, audiovisual media, and records, using metadata, ontologies, and Semantic Web technologies. Research in this area is important because of the overwhelming amount of information available in many organizations and on the Internet itself. Syntactic Web search engines, such as Google and Yahoo, have given people the ability to access knowledge whenever they need to verify a piece of information, compare prices or read the news. In contrast to syntactic Web search, semantic "Web search" and "Semantic Web" search aim to make information accessible to computer programs by encoding using interpretable forms such as RDF and OWL. Some interesting projects have already been launched and have achieved a considerable success. For example, Swoogle, a crawler-based search engine, indexing and retrieval system for the Semantic Web built on top of the Google API, serves knowledge engineers by providing a means for them to find ontologies, terms and data. Currently, Swoogle contains information on over 700,000 RDF documents. Digital Libraries have also benefited from the use of Semantic Web technologies. RDF and OWL can be used as a common interchange format for catalog metadata and shared vocabularies, which can be used by all libraries and search engines across the Web. This is important since it is not uncommon to find library systems based on various metadata formats and built by different persons for their special purposes. By publishing ontologies, which can then be accessed by all users across the Web, library catalogs can use the same vocabularies for cataloging, marking up items with the most relevant terms for the domain of interest. RDF and OWL provide a single and consistent encoding so im! plementers of digital library metadata systems will have their task simplified when interoperating with other digital library systems. Another example is Vodafone, a leading mobile phone company. Vodafone has used RDF to describe and search ring tones, games and pictures in their Web site. As a result, the page viewed per download has decreased by 50% and revenues have risen by 20%. Many more successful examples could be enumerated. High quality contributions addressing related theoretical and practical aspects are expected. Topics of interest include, but are not limited to: Semantic-driven indexing and retrieval Semantic browsing of large data archives Semantic interfaces for interaction with large repositories Syntactic browsers enhanced with semantics Annotation of documents to increase search precision Search in RDF databases Annotating HTML documents with semantics Discovery of semantic Web Services Semantic Web information retrieval : searching, querying, and ranking Meta-search engines Submission Procedure Prospective contributors are invited to submit papers in A4/US letter, single column, and double space format, up to 30 pages long including figures, tables and references. Authors should submit their manuscripts in pdf format to jcardoso@uma.pt. Camera-ready papers will have to conform to the style of the target journal. Important Dates Deadline for manuscript submission: 30 June 2007 Notification to authors: 30 August 2007 Final accepted manuscript due: 30 September 2007 Publication Date: 2008 Guest Editors Jorge Cardoso, University of Madeira, Portugal Christoph Bussler, CISCO Systems, Inc., USA Francesco Guerra, Universita' di Modena e Reggio Emilia, Italy