- National Linked Data Finland Project Starts
A new national project funded by Tekes 22 Finnish companies and public...
20.2.2012 13:52 by eahyvone - Master´s thesis award to SeCo
Master’s thesis “Easily Integrable Ontology Services on...
31.5.2011 16:39 by jwtuomin - World Summit Award (WSA) Mobile 2011 to SeCo
SmartMuseum application, developed in the FP7 SmartMuseum project by...
17.12.2010 15:11 by eahyvone
- Eetu Mäkelä, Eero Hyvönen and Tuukka Ruotsalo: How to deal with massively heterogeneous cultural heritage data – lessons learned in CultureSampo
- Dimitrios A. Koutsomitropoulos, Eero Hyvönen, and Theodore S. Papatheodorou: Semantic Web and Reasoning for Cultural Heritage and Digital Libraries
- : Semantic Web and Reasoning for Cultural Heritage and Digital Libraries
- Osma Suominen and Eero Hyvönen: Improving the Quality of SKOS Vocabularies with Skosify
- A faceted bROwSEr by any other name?
When doing research for my thesis, I’ve found that there’s...
25.8.2007 1:04 by oisuomin - RDF ? Hit?n'run in Doom style
Does RDF resources and properties make you sick? No problem, you can...
23.11.2006 21:00 by kimvilja - Inside Semantic Computing
Welcome to the blog of the Semantic Computing Research Group SeCo!...
19.11.2006 14:39 by kimvilja
Semantic Computing Research Group SeCo on Facebook
Hello there! I am currently trying to get things done (i.e. writing). In matters related to SeCo, ONKI etc, please contact my dear colleagues.
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| phone: | +358 (0)40 5414654 (mobile) |
| email: | firstname.lastname@aalto.fi |
| fax: | +358-9-4702 3356 |
| room: | 2541 @ TUAS-house, Otaniementie 17, Espoo |
| postal address: | Department of Media Technology School of Science Aalto University P.O. Box 15500 FI00076 Aalto Finland |
| My URI: | http://iki.fi/digikim#i |
typical work position
Current activities
- Ongoing PhD studies.
- Building the Finnish Ontology Library Service ONKI.
- Distributed content creation and publishing on the Semantic Web, creating Linked Data
- Check my unacademic homepage for additional projects and info.
Other
- My Aalto blog
Interests include
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Current and previous projects in SeCo
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Publications & selected presentations
2012
Jouni Tuominen, Kim Viljanen and Eero Hyvönen: Ontologiapalvelut semanttisessa webissä (Ontology services on the Semantic Web). (in Finnish), Tietojenkäsittelytiede, no. 1, pp. 17-36, Tietojenkäsittelytieteen Seura ry, 4, 2012. bib pdf
Ontologiat ovat keskeinen osa semanttista webiä: ne toimivat yhteisinä jaettuina käsitteistöinä, joiden avulla tietokoneet voivat käsitellä tietoa älykkäämmin. Jotta eri toimijat voivat hyödyntää yhteisiä käsitteistöjä sovelluksissaan, ontologiat on julkaistava heidän käyttöönsä. Yksinkertaisimmillaan ontologiat voidaan julkaista tiedostomuodossa. Tällöin jokainen toimija joutuu toteuttamaan itse toiminnallisuuksia ontologioiden hyödyntämiseen. Koska osa toiminnallisuuksista on yleisiä, useissa järjestelmissä toistuvia, niiden toteuttaminen valmiina palveluina on mielekästä. Palveluita voidaan tarjota ihmiskäyttäjille käyttöliittymäkomponentteina sekä ohjelmalliseen käyttöön rajapintoina, joita käyttämällä toiminnallisuudet voidaan integroida asiakasjärjestelmiin. Tässä artikkelissa kuvataan ontologioiden käyttäjäryhmien tarpeita sekä ontologiapalveluiden toteutuksia. Yleisten ontologioiden käyttämiseen liittyvien toiminnallisuuksien tarjoamiseksi esitetään ontologiapalvelu ONKI, joka on osa Suomalaiset semanttisen webin ontologiat -hankesarjassa (FinnONTO, 2003–2012) kehitettyä ontologiainfrastruktuuria. Artikkeli perustuu Jouni Tuomisen pro gradu -työhön, jolle Tietojenkäsittelytieteen Seura ry myönsi lukuvuoden 2009–2010 pro gradu -palkinnon. Tutkimustyöhön ovat osallistuneet myös Kim Viljanen ja Eero Hyvönen.
2011
Alexander García Castro, Ken Baclawski, John Bateman, Christoph Lange and Kim Viljanen (eds.): . Proceedings of the ISWC 2011 Workshop Ontologies Come of Age in the Semantic Web (OCAS), CEUR Workshop Proceedings, Vol 809, http://ceur-ws.org, ISSN 1613-0073, October, 2011. bib link
Kim Viljanen, Jouni Tuominen, Eetu Mäkelä and Eero Hyvönen: Combining Distributed Ontology Repositories into a Global Service. June, 2011. Draft paper. bib pdf
Ontologies and vocabularies are a key resource for creating interoperable metadata on the Semantic Web. To make finding and using ontologies easier, the idea of Ontology Repositories has been introduced with current implementations including e.g. the NCBO Bioportal, ONKI and Cupboard. There is a genuine need for different kinds of Ontology Repositories, each focusing on different kinds specific user-needs, different ontologies and different organizational requirements which cannot be addressed by a single general implementation. However, at the moment each Ontology Repository is a separate island with its own user interfaces and APIs. They also use varying ontology languages such as OWL, SKOS, and RDF Schema. Due to this, global search, browsing, and inference over the repositories is difficult and generally not done which means that, for example, finding and reusing existing ontologies becomes difficult. To address the problems, we have developed a loosely coupled Network of Ontology Repositories (NOR) architecture that makes the repositories globally interoperable while maintaining their unique functionalities and strengths. To participate in the network, each ontology repository is required to implement a shared API. As a proof-of-concept evaluation, we present three case implementations demonstrating different aspects of the NOR approach: 1) internal distributed architecture of ONKI, 2) global search of ONKI and NCBO Bioportal, 3) publishing non-ontological concept collections as NOR endpoints, demonstrated with the semantic portal CultureSampo and the metadata editor SAHA.
2010
Kim Viljanen, Jouni Tuominen and Eero Hyvönen: A Network of Ontology Repositories. December, 2010. Draft paper. bib pdf
Ontologies and vocabularies are a key resource for creating interoperable metadata on the Semantic Web. To make the finding and using ontologies easier, the idea of Ontology Repositories have been introduced with current implementations including e.g. the NCBO Bioportal, ONKI and Cupboard. However, at the moment each ontology repository is a separate island with its own user interfaces and APIs. They also use varying ontology languages such as OWL, SKOS, RDF Schema and others. Due to this, global search, browsing, and inference over the repositories is difficult and generally not done. At the same time, there is a genuine need for different kinds of Ontology Repositories, each focusing on different kinds specific user-needs, different ontologies and different organizational requirements which can not be addressed by a single global implementation. Since there are benefits of having interoperability among the repositories, we have developed a loosely coupled Network of Ontology Repository (NOR) architecture that makes the repositories globally interoperable while maintaining their unique functionalities and strengths. To participate in the network, each ontology repository is required to implement a shared API. As a proof-of-concept, we present a global metasearch prototype for searching simultaneously hundreds of ontologies in the ONKI and NCBO Bioportal repositories.
Jouni Tuominen, Mikko Salonoja, Kim Viljanen and Eero Hyvönen: A User Interface for Ontology Repositories. Workshop on Ontology Repositories and Editors for the Semantic Web (ORES 2010), the Extended Semantic Web Conference ESWC 2010, CEUR Workshop Proceedings, http://ceur-ws.org/, Heraklion, Greece, June, 2010. bib pdf
Finding ontologies and concepts from a collection of ontologies is a recurring task in many use cases, such as content indexing, searching, and ontology developing. To facilitate this, efficient search and browsing methods are needed. This paper introduces ONKI2, an ontology browser providing a user interface for a repository of ontologies. The system provides a multi-facet search facility for finding an ontology. Finding concepts is supported by autocompletion-based text search that can be refined with additional restrictions. ONKI2 is in use in the Finnish Ontology Library Service ONKI for a collection of 79 ontologies and vocabularies.
Kim Viljanen, Jouni Tuominen, Mikko Salonoja and Eero Hyvönen: Global Access to Distributed Ontology Repositories. Poster Papers, the Extended Semantic Web Conference ESWC 2010, Heraklion, Greece, June, 2010. bib pdf
Ontology repository systems are used for publishing and sharing ontologies. However, currently the repositories form separate islands of ontologies, which hinders the user from finding and utilizing the most suitable ontological concepts and ontologies on a global level. In contrast, this paper presents the idea of creating a network of Linked Open Ontology Services (LOOS) based on a set of ontology services that publish their content via a shared API. This facilitates global search and browsing over all ontologies in the network. LOOS has been implemented in the National Finnish Ontology Service ONKI serving currently 79 ontologies.
Kim Viljanen, Jouni Tuominen, Mikko Salonoja and Eero Hyvönen: Linked Open Ontology Services. Workshop on Ontology Repositories and Editors for the Semantic Web (ORES 2010), the Extended Semantic Web Conference ESWC 2010, CEUR Workshop Proceedings, http://ceur-ws.org/, Heraklion, Greece, June, 2010. bib pdf
Ontology repository systems are used for publishing and sharing ontologies and vocabularies for content indexing, information retrieval, content integration, and other purposes. However, interlinking these distributed repositories to provide global search and browsing over the repositories has not been made. In the spirit of Linked Open Data, we propose creating a network of Linked Open Ontology Services (LOOS) consisting of ontology repositories that publish their content using a shared API. To test the approach, we have defined an HTTP API and present a proof-of-concept implementation consisting of three client applications that are used for accessing a LOOS network of over 50 ontology servers, part of the Ontology Library Service ONKI.
Mathieu d Aquin, Alexander García Castro, Christoph Lange and Kim Viljanen (eds.): Ontology Repositories and Editors for the Semantic Web ORES-2010. Proceedings. CEUR-WS, Heraklion, Greece, May 31, 2010. bib link
2009
Osma Suominen, Eero Hyvönen, Kim Viljanen and Eija Hukka: HealthFinland-a National Semantic Publishing Network and Portal for Health Information. Journal of Web Semantics, vol. 7, no. 4, pp. 271-376, Dec, 2009. bib pdf
Providing citizens with reliable, up-to-date and individually relevant health information on the web is done by governmental, non-governmental, business and other organizations. Currently the information is published with little co-ordination and co-operation between the publishers. For publishers, this means duplicated work and costs due to publishing same information twice on many websites. Also maintaining links between websites requires work. From the citizens point of view, finding content is difficult due to e.g. differences in layman’s vocabularies compared to medical terminology and difficulties in aggregating information from several sites. To solve these problems, we propose as a solution a national scale semantic publishing system HealthFinland which consists of a 1) a centralized content infrastructure of health ontologies and services with tools, 2) a distributed semantic content creation channel based on several health organizations, and 3) an intelligent semantic portal aggregating and presenting the contents from intuitive and health promoting end-user perspectives for human users as well as for other web sites and portals.
Osma Suominen, Kim Viljanen and Eero Hyvönen: TerveSuomi-portaalin metatietomäärittely (HealthFinland portal metadata specification). Jun 18, 2009. bib pdf
Jouni Tuominen, Matias Frosterus, Kim Viljanen and Eero Hyvönen: ONKI SKOS Server for Publishing and Utilizing SKOS Vocabularies and Ontologies as Services. Proceedings of the 6th European Semantic Web Conference (ESWC 2009), Heraklion, Greece, May 31 - June 4, 2009. Springer-Verlag. bib pdf
Vocabularies are the building blocks of the Semantic Web providing shared terminological resources for content indexing, information retrieval, data exchange, and content integration. Most semantic web applications in practical use are based on lightweight ontologies and, more recently, on the Simple Knowledge Organization System (SKOS) data model being standardized by W3C. Easy and cost-efficient publication, integration, and utilization methods of vocabulary services are therefore highly important for the proliferation of the Semantic Web. This paper presents the ONKI SKOS Server for these tasks. Using ONKI SKOS, a SKOS vocabulary or a lightweight ontology can be published on the web as ready-to-use services in a matter of minutes. The services include not only a browser for human usage, but also Web Service and AJAX interfaces for concept finding, selecting and transporting resources from the ONKI SKOS Server to connected systems. Code generation services for AJAX and Web Service APIs are provided automatically, too. ONKI SKOS services are also used for semantic query expansion in information retrieval tasks. The idea of publishing ontologies as services is analogous to Google Maps. In our case, however, vocabulary services are provided and mashed-up in applications. ONKI SKOS was published in the beginning of 2008 and is to our knowledge the first generic SKOS server of its kind. The system has been used to publish and utilize some 60 vocabularies and ontologies in the National Finnish Ontology Service ONKI www.yso.fi.
Jouni Tuominen, Tomi Kauppinen, Kim Viljanen and Eero Hyvönen: Ontology-Based Query Expansion Widget for Information Retrieval. Proceedings of the 5th Workshop on Scripting and Development for the Semantic Web (SFSW 2009), 6th European Semantic Web Conference (ESWC 2009), CEUR Workshop Proceedings, http://ceur-ws.org/, Heraklion, Greece, May 31 - June 4, 2009. bib pdf
In this paper we present an ontology-based query expansion widget which utilizes the ontologies published in the ONKI Ontology Service. The widget can be integrated into a web page, e.g. a search system of a museum catalogue, enhancing the page by providing a query expansion functionality. We have tested the system with general, domain-specific and spatio-temporal ontologies.
Kim Viljanen, Jouni Tuominen and Eero Hyvönen: Ontology Libraries for Production Use: The Finnish Ontology Library Service ONKI. Proceedings of the 6th European Semantic Web Conference (ESWC 2009), Heraklion, Greece, May 31 - June 4, 2009. Springer-Verlag. bib pdf
This paper discusses problems of creating and using ontology library services in production use. One approach to a solution is presented with an online implementation--the Finnish Ontology Library Service ONKI--that is in pilot use on a national level in Finland. ONKI contributes to previous research on ontology libraries in many ways: First, mashup and web service support with various tools is provided for cost-efficient utilization of ontologies in indexing and search applications. Second, services covering the different phases of the ontology life cycle are provided. Third, the services are provided and used in real world applications on a national scale. Fourth, the ontology framework is being developed by a collaborative effort by organizations representing different application domains, such as health, culture, and business.
Eero Hyvönen, Eetu Mäkelä, Tomi Kauppinen, Olli Alm, Jussi Kurki, Tuukka Ruotsalo, Katri Seppälä, Joeli Takala, Kimmo Puputti, Heini Kuittinen, Kim Viljanen, Jouni Tuominen, Tuomas Palonen, Matias Frosterus, Reetta Sinkkilä, Panu Paakkarinen, Joonas Laitio, Katariina Nyberg: CultureSampo - A National Publication System of Cultural Heritage on the Semantic Web 2.0. Proceedings of the 6th European Semantic Web Conference (ESWC2009), Heraklion, Greece, May 31 - June 4, 2009. Springer-Verlag. bib pdf
Eero Hyvönen, Eetu Mäkelä, Tomi Kauppinen, Olli Alm, Jussi Kurki, Tuukka Ruotsalo, Katri Seppälä, Joeli Takala, Kimmo Puputti, Heini Kuittinen, Kim Viljanen, Jouni Tuominen, Tuomas Palonen, Matias Frosterus, Reetta Sinkkilä, Panu Paakkarinen, Joonas Laitio, Katariina Nyberg: CultureSampo - Finnish Culture on the Semantic Web 2.0. Thematic Perspectives for the End-user. Proceedings, Museums and the Web 2009, Indianapolis, USA, April 15-18, 2009. bib pdf
Eero Hyvönen, Eetu Mäkelä, Tomi Kauppinen, Olli Alm, Jussi Kurki, Tuukka Ruotsalo, Katri Seppälä, Joeli Takala, Kimmo Puputti, Heini Kuittinen, Kim Viljanen, Jouni Tuominen, Tuomas Palonen, Matias Frosterus, Reetta Sinkkilä, Panu Paakkarinen, Joonas Laitio, Katariina Nyberg: CultureSampo - Finnish Cultural Heritage Collections on the Semantic Web 2.0. Proceedings of the 1st International Symposium on Digital Humanities for Japanese Arts and Cultures (DH-JAC-2009), Ritsumeikan University, Kyoto, Japan, March, 2009. bib pdf
2008
Tuukka Ruotsalo, Katri Seppälä, Kim Viljanen, Eetu Mäkelä, Jussi Kurki, Olli Alm, Tomi Kauppinen, Jouni Tuominen, Matias Frosterus, Reetta Sinkkilä and Eero Hyvönen: Ontology-based Approach for Interoperability of Digital Collections. Signum, no. 5, 2008. bib pdf
Eero Hyvönen, Kim Viljanen, Jouni Tuominen, Katri Seppälä, Tomi Kauppinen, Matias Frosterus, Reetta Sinkkilä, Jussi Kurki, Olli Alm, Eetu Mäkelä and Joonas Laitio: National Ontology Infrastructure Service ONKI. Oct 1, 2008. bib pdf
This paper presents the national level cross-domain ontology and ontology service infrastructure ONKI used in Finland. The novelty of ONKI is based on two ideas. First, the core ontologies are developed collaboratively by experts transforming thesauri into mutually aligned lightweight ontologies, based on a large top ontology that is extended by various domain specific ontologies. Second, the National Ontology Service ONKI has been implemented for publishing ontologies cost-efficiently as ready to use services. ONKI provides legacy and other applications with ready to use functionalities for using ontologies on the HTML level by Ajax and semantic widgets. ONKI has been used in various applications for creating mash-up applications in a way analogous to using Google Maps, but in our case external applications are mashed-up with ontology support for indexing and information retrieval.
Osma Suominen, Eero Hyvönen, Kim Viljanen, Eija Hukka: HealthFinland - A National Publication System for Semantic Health Information. Semantic Computing Research Group, Helsinki University of Technology and University of Helsinki, Sept 29, 2008. bib pdf
Eero Hyvönen, Eetu Mäkelä, Tomi Kauppinen, Olli Alm, Jussi Kurki, Tuukka Ruotsalo, Katri Seppälä Kim Viljanen, Jouni Tuominen, Tuomas Palonen, Matias Frosterus, Reetta Sinkkilä, Panu Paakkarinen, Joonas Laitio, Katariina Nyberg: CultureSampo - A Collective Memory of Finnish Cultural Heritage on the Semantic Web 2.0. Semantic Computing Research Group, Helsinki University of Technology and University of Helsinki, Sept 29, 2008. bib pdf
Jouni Tuominen, Matias Frosterus, Kim Viljanen and Eero Hyvönen: ONKI-SKOS - Publishing and Utilizing Thesauri in the Semantic Web. AI and Machine Consciousness - Proceedings of the 13th Finnish Artificial Intelligence Conference STeP 2008, Espoo, Finland, August 20-22, 2008. bib pdf
Thesauri and other controlled vocabularies act as building blocks of the Semantic Web by providing shared terminology for facilitating information retrieval, data exchange and integration. Representation and publishing methods are needed for utilizing thesauri efficiently, e.g., in content indexing and searching. W3C has provided the Simple Knowledge Organization System (SKOS) data model for expressing concept schemes, such as thesauri. A standard representation format for thesauri eliminates the need for implementing thesaurus specific rules or applications for processing them. However, there do not exist general tools which provide out of the box support for publishing and utilizing SKOS vocabularies in applications, without needing to implement application specific user interfaces for end users. For solving this problem the ONKI-SKOS server is presented.
Kim Viljanen, Jouni Tuominen and Eero Hyvönen: Publishing and Using Ontologies as Mash-Up Services. Proceedings of the 4th Workshop on Scripting for the Semantic Web (SFSW2008), 5th European Semantic Web Conference 2008 (ESWC 2008), CEUR Workshop Proceedings, http://ceur-ws.org/, Tenerife, Spain, June 1-5, 2008. bib pdf
The Semantic Web is based on using ontologies for enabling semantically disambiguated data exchange between distributed systems on the web. This requires efficient means for publishing ontologies on the web to ensure the availability, sharing and acceptance of the ontologies. Support services are needed for utilizing ontologies easily and cost-effectively in applications and legacy systems lacking ontology support. To address these vital needs, this paper presents the ONKI ontology service which provides ready-to-use mash-up functionalities, such as semantic disambiguation, concept finding and concept fetching as ready-to-use web widgets for adding ontology support to e.g. HTML forms using JavaScript. Two implementations of the ONKI Server are presented: ONKI-SKOS for ontologies presented in the Simple Knowledge Organization System (SKOS) language and ONKI-Geo for geographical ontologies with a map interface. The presented ONKI systems are operational on the web, used in the National Finnish Ontology Service. They have been successfully used in several pilot applications.
Eero Hyvönen, Kim Viljanen, Jouni Tuominen and Katri Seppälä: Building a National Semantic Web Ontology and Ontology Service Infrastructure--The FinnONTO Approach. Proceedings of the European Semantic Web Conference ESWC 2008, Springer, Tenerife, Spain, June 1-5, 2008. bib pdf
This article presents the vision and results of creating a national level cross-domain ontology service infrastructure in Finland in the FinnONTO project. The novelty of the infrastructure is based on two ideas. First, a system of open source core ontologies is being developed by transforming thesauri into mutually aligned lightweight ontologies, including a top ontology of 20,000 concepts that is extended by various domain specific ontologies. Second, the ONKI Ontology Server framework for publishing ontologies as ready to use services has been designed and implemented. ONKI provides legacy and other applications with ready to use functionalities for using ontologies on the user interface level as semantic widgets. The idea is to use ONKI for creating mash-up applications in a way analogous to using Google or Yahoo Maps, but in our case external applications are mashed-up with ontology support. The ontology framework presented is operational on the web and is being used in creating the application demonstrations.
Eero Hyvönen, Kim Viljanen, Osma Suominen, Eija Hukka: HealthFinland - Publishing Health Promotion Information on the Semantic Web. Proceedings of DrMED 2008: International Workshop on Describing Medical Web Resources. The 21st International Congress on the European Federation for Medical Informatics (MIE 2008), Göteborg, Sweden, May, 2008. bib pdf
Kim Viljanen, Jouni Tuominen, Teppo Känsälä and Eero Hyvönen: Distributed Semantic Content Creation and Publication for Cultural Heritage Legacy Systems. Proceedings of the 2008 IEEE International Conference on Distributed Human-Machine Systems, IEEE Press, Athens, Greece, March 9-12, 2008. bib pdf
Cultural heritage is by nature strongly interlinked, e.g. thematically and historically, but at the same time distributed in heterogeneous collections of different memory organizations at different locations. In order to provide the end-users with aggregated homogeneous views to distributed heterogeneous contents, semantic portals have been created successfully based on metadata and shared (or aligned) ontologies. This paper discusses two problems encountered in such a distributed semantic content creation environment. First, during the content creation work, how could a publisher start using shared ontologies in legacy cataloguing and annotation systems that do not support ontologies. Second, during content publication, how could a publisher re-use the aggregated content in its own legacy publication system, e.g., on the ordinary web pages of a museum or in a collection browser. As a solution, we present the ONKI Ontology Server for adding shared ontological annotation functionalities to legacy cataloguing systems in a practical, cost-efficient and lightweight way. For distributed publishing of the aggregated semantic portal services, we introduce the lightweight mash-up web widget components called floatlets . A major idea behind both the ONKI functionalities and floatlets is that they can be easily integrated with legacy systems on the user interface level, in the same spirit as e.g. Google Maps.
2007
Kim Viljanen, Jouni Tuominen, Eero Hyvönen, Eetu Mäkelä and Osma Suominen: Extending Content Management Systems with Ontological Annotation Capabilities. Poster proceedings of the 6th International Semantic Web Conference, Busan, Korea, November 11-15, 2007. bib pdf
Producing semantic metadata requires efficient methods, e.g., concept finding, for accessing and using ontologies. To add such functionalities to metadata applications such as cataloging systems in museums, we propose a \emphmash-up approach where ready-to-use user interface components for using specific ontologies are made available to be integrated into applications. As a proof-of-concept, we present the \emphOntology Service ONKI wich implements semantic autocompletion concept search and concept browsing for ontologies as shared mash-up components.
Eetu Mäkelä, Kim Viljanen, Olli Alm, Jouni Tuominen, Onni Valkeapää, Tomi Kauppinen, Jussi Kurki, Reetta Sinkkilä, Teppo Känsälä, Robin Lindroos, Osma Suominen, Tuukka Ruotsalo and Eero Hyvönen: Enabling the Semantic Web with Ready-to-Use Web Widgets. Proceedings of the First Industrial Results of Semantic Technologies Workshop, ISWC2007, November 11, 2007. bib pdf
A lot of functionality is needed when an application, such as a museum cataloguing system, is extended with semantic capabilities, for example ontological indexing functionality or multi-facet search. To avoid duplicate work and to enable easy and cost-efficient integration of information systems with the Semantic Web, we propose a web widget approach. Here, data sources are combined with functionality into readyto-use software components that allow adding semantic functionality to systems with just a few lines of code. As a proof of the concept, we present a collection of general semantic web widgets and case applications that use them, such as the ontology server ONKI, the annotation editor SAHA and the culture portal CultureSampo.
Kim Viljanen, Jouni Tuominen and Eero Hyvönen: ONKI Ontology Server--Extending Legacy Systems with Ontology Mash-up Services. November, 2007. Submitted for review. bib pdf
The Semantic Web is based on using shared ontologies for enabling semantically disambiguated data exchange between distributed systems on the web. This requires, from the ontology publisher s viewpoint, efficient means for publishing ontologies on the web to ensure the availability and acceptance of the ontologies. From the ontology user s viewpoint, support services are needed for utilizing ontologies easily and cost-effectively in the users own systems that are typically legacy systems without ontology support. This paper presents the ONKI ontology server for addressing these vital needs. For the publisher, ONKI provides a server and a Simple Knowledge Organization (SKOS) compatible light-weight ontology browser with ready-made web interfaces for making ontologies available both for human and machine users. For external legacy and other applications, ONKI provides centralized ontology services for semantic disambiguation, concept finding, and concept fetching. A major contribution of ONKI is to provide these services as ready-to-use functionalities for creating mash-up applications very cost-efficiently. Two prototypes of the system---ONKI-SKOS for all kinds of ontologies and ONKI-Geo for geographical ontologies with a map mash-up interface---are operational on the web and are currently being successfully used in several pilot applications.
Eero Hyvönen, Kim Viljanen and Osma Suominen: HealthFinland - Finnish Health Information on the Semantic Web. Proceedings of the 6th International Semantic Web Conference (ISWC 2007), Busan , Korea, Springer-Verlag, Nov, 2007. bib pdf
This paper shows how semantic web techniques can be applied to solving problems of distributed content creation, discovery, linking, aggregation, and reuse in health information portals, both from end-users and content publishers viewpoints. As a case study, the national semantic health portal \HF\ is presented. It provides citizens with intelligent searching and browsing services to reliable and up-to-date health information created by various health organizations in Finland. The system is based on a shared semantic metadata schema, ontologies, and ontology services. The content includes metadata about thousands of web documents such as web pages, articles, reports, campaign information, news, services, and other information related to health.
Eero Hyvönen, Tuukka Ruotsalo, Thomas Häggström, Mirva Salminen, Miikka Junnila, Mikko Virkkilä, Mikko Haaramo, Eetu Mäkelä, Tomi Kauppinen and and Kim Viljanen: CultureSampo-Finnish Culture on the Semantic Web: The Vision and First Results (based on the STeP 2006 paper below). In: K. Robering (ed.): Information Technology for the Virtual Museum. LIT Verlag, Berlin., Nov, 2007. bib pdf
Eero Hyvönen, Kim Viljanen, Osma Suominen and Eija Hukka: HealthFinland - Publishing Health Promotion Information on the Semantic Web. International Journal of Health Care Engineering, vol. 15, no. 5, pp. 325, oct, 2007. Abstract of a longer paper. bib
Eero Hyvönen, Kim Viljanen, Eetu Mäkelä, Tomi Kauppinen, Tuukka Ruotsalo, Onni Valkeapää, Katri Seppälä, Osma Suominen, Olli Alm, Robin Lindroos, Teppo Känsälä, Riikka Henriksson, Matias Frosterus, Jouni Tuominen, Reetta Sinkkilä and Jussi Kurki: Elements of a National Semantic Web Infrastructure - Case Study Finland on the Semantic Web (Invited paper). Proceedings of the First International Semantic Computing Conference (IEEE ICSC 2007), Irvine, California, September, 2007. IEEE Press. bib pdf
This article presents the vision and results of creating the basis for a national semantic web content infrastructure in Finland in 2003-2007. The main elements of the infrastructure are shared and open metadata schemas, core ontologies, and public ontology services. Several practical applications testing and demonstrating the usefulness of the infrastructure are overviewed in the fields of eCulture, eHealth, eGovernment, eLearning, and eCommerce.
Osma Suominen, Kim Viljanen and Eero Hyvönen: Semantic Faceted Search in a Citizens Health Portal. Demo track at the European Semantic Web Conference ESWC 2007, Innsbruck, Austria, June 4-5, 2007. bib pdf
Osma Suominen, Kim Viljanen and Eero Hyvönen: User-centric Faceted Search for Semantic Portals. Proceedings of the European Semantic Web Conference ESWC 2007, Innsbruck, Austria, Springer, June 4-5, 2007. bib pdf
Kim Viljanen, Eero Hyvönen, Eetu Mäkelä, Osma Suominen and Jouni Tuominen: Mash-up Ontology Services for the Semantic Web. Demo track at the European Semantic Web Conference ESWC 2007, Innsbruck, Austria, June 4-5, 2007. bib pdf
We present ONKI ontology server, a mash-up approach for integrating ontology library services with semantic web applications. The idea of ONKI is to provide applications with ready-to-use ontology service functionalities, such as semantic autocompletion, browsing, and annotation support, at the user interface level using AJAX mash-up technologies. The system is being integrated with various semantic web applications.
Eero Hyvönen, Katri Seppälä, Kim Viljanen and Matias Frosterus: Yleinen suomalainen ontologia YSO -- kohti suomalaista semanttista webiä (General Finnish Ontology YSO--Towards the Finnish Semantic Web). Tietolinja, May, 2007. bib pdf
Osma Suominen, Kim Viljanen, Eero Hyvönen, Markus Holi and Petri Lindgren: TerveSuomi.fi:n metatietomäärittely (TerveSuomi.fi metadata specification). Jan 26, 2007. bib pdf
2006
Eero Hyvönen, Tomi Kauppinen, Jukka Kortela, Mikko Laukkanen, Tapani Raiko and Kim Viljanen (eds.): Developments in Artificial Intelligence and the Semantic Web - Proceedings of the 12th Finnish AI Conference STeP 2006. Finnish AI Society, Finland, October 26-27, 2006. bib pdf
Eero Hyvönen, Tuukka Ruotsalo, Thomas Häggström, Mirva Salminen, Miikka Junnila, Mikko Virkkilä, Mikko Haaramo, Eetu Mäkelä, Tomi Kauppinen and and Kim Viljanen: CultureSampo-Finnish Culture on the Semantic Web: The Vision and First Results. Developments in Artificial Intelligence and the Semantic Web - Proceedings of the 12th Finnish AI Conference STeP 2006, October 26-27, 2006. bib pdf
Kim Viljanen, Teppo Känsälä, Eero Hyvönen and Eetu Mäkelä: ONTODELLA - A Projection and Linking Service for Semantic Web Applications. Proceedings of the 17th International Conference on Database and Expert Systems Applications (DEXA 2006), Krakow, Poland, pp. 370-376, IEEE, September 4-8, 2006. bib pdf ps
Content in semantic web portals is often projected along application specific navigational taxonomies and linked semantically. This paper presents a logic-based method and a server ONTODELLA for these tasks. We argue that logic rules between the content layer and the application layer add flexibility and better architectural separation of content and functionality. The system has been implemented and applied succesfully in several semantic portals.
Markus Holi, Petri Lindgren, Osma Suominen, Kim Viljanen and Eero Hyvönen: TerveSuomi.fi - A Semantic Health Portal for Citizens. July 17, 2006. Poster paper, 1st Asian Semantic Web Conference (ASWC2006). bib pdf
Kim Viljanen: Monilähteinen suosittelu semanttisessa webissä. MSc Thesis (in Finnish), University of Helsinki, March 6, 2006. bib pdf
2005
Eero Hyvönen, Eetu Mäkelä, Mirva Salminen, Arttu Valo, Kim Viljanen, Samppa Saarela, Miikka Junnila and Suvi Kettula: MuseumFinland - Finnish Museums on the Semantic Web. Journal of Web Semantics, vol. 3, no. 2, pp. 25, 2005. bib pdf
This article presents the semantic portal MUSEUMFINLAND for publishing heterogeneous museum collections on the Semantic Web. It is shown how museums with their semantically rich and interrelated collection content can create a large, consolidated semantic collection portal together on the web. By sharing a set of ontologies, it is possible to make collections semantically interoperable, and provide the museum visitors with intelligent content-based search and browsing services to the global collection base. The architecture underlying MUSEUMFINLAND separates generic search and browsing services from the underlying application dependent schemas and metadata by a layer of logical rules. As a result, the portal creation framework and software developed has been applied successfully to other domains as well. MUSEUMFINLAND got the Semantic Web Challence Award (second prize) in 2004.
Eetu Mäkelä, Kim Viljanen, Petri Lindgren, Mikko Laukkanen and Eero Hyvönen: Semantic Yellow Page Service Discovery: The Veturi Portal. Poster paper, 4th International Semantic Web Conference, Nov, 2005. bib pdf
A prototype semantic yellow page service portal is described. Our idea is to represent service offerings as events and processes in terms of ontologies. Based on versatile semantic descriptions, users can be provided with a flexible view-based search engine enhanced with semantic text autocompletion.
2004
Mikko Laukkanen, Kim Viljanen, Mikko Apiola, Petri Lindgren, Eetu Mäkelä, Samppa Saarela and Eero Hyvönen: Towards Semantic Web-Based Yellow Page Directory Services. Presented at the Third International Semantic Web Conference (ISWC2004), Hiroshima, Japan, Nov, 2004. Poster paper. bib pdf
This paper describes the ongoing work of IWebS (Intelligent Web Services) project, which studies the possibilities of the Semantic Web technology in creating a yellow page directory service for end-users. We propose an ontology-based mechanism for both advertising and finding the services. The essential parts of the system are ontologies for describing and storing service advertisements, a semantic service finder for the enduser, and a semantic service annotation editor for service providers.
Eero Hyvönen, Tomi Kauppinen, Mirva Salminen, Kim Viljanen and Pekka Ala-Siuru (eds.): Web Intelligence-Proceedings of the 11th Finnish AI Conference. September 1-3, 2004. bib
Eero Hyvönen, Miikka Junnila, Suvi Kettula, Eetu Mäkelä, Samppa Saarela, Mirva Salminen, Ahti Syreeni, Arttu Valo and Kim Viljanen: Publishing Museum Collections on the Semantic Web - the MuseumFinland Portal. Proceedings of WWW2004, New York, Alternate Track Papers and Posters, May, 2004. bib pdf
Museum collections contain large amounts of data and semantically rich, mutually interrelated metadata in heterogeneous databases. The publication of museum collections on the web is therefore a very promising application domain for semantic web techniques. We present a semantic web portal called MUSEUMFINLAND - Finnish Museums on the Semantic Web , that contains some 4,000 cultural artifacts from the collections of three museums using three different database schemas and database systems. The system is based on seven RDF(S) ontologies consisting of some 10,000 classes and individuals.
Mikko Laukkanen, Kim Viljanen, Mikko Apiola, Petri Lindgren and Eero Hyvönen: Towards Ontology-Based Yellow Page Services. Proceedings of WWW2004 Workshop, Application Design, Development, and Implementation Issues, May, 2004. bib pdf
Eetu Mäkelä, Eero Hyvönen, Samppa Saarela and Kim Viljanen: OntoViews - A Tool for Creating Semantic Web Portals. Proceedings of the 3rd International Semantic Web Conference (ISWC 2004), May, 2004. bib pdf
This paper presents a semantic web portal tool ONTOVIEWS for publishing RDF content on the web. ONTOVIEWS provides the portal designer with a content-based search engine server, Ontogator, and a link recommendation system server, Ontodella. The user interface is created by combining these servers with the Apache Cocoon framework. From the end-user s viewpoint, the key idea of ONTOVIEWS is to combine the multi-facet search paradigm, developed within the information retrieval research community, with semantic web RDFS ontologies, and extend the search service with a semantic browsing facility based on ontological reasoning. ONTOVIEWS is presented from the view points of the end user, architecture, and implementation. The implementation described is modular, easily modified and extended, and provides a good practical basis for creating semantic portals on the web. As a proof of concept, application of ONTOVIEWS to a deployed semantic web portal is discussed.
Eero Hyvönen, Markus Holi and Kim Viljanen: Designing and Creating a Web Site Based on RDF Content. Proceedings of WWW2004 Workshop, Application Design, Development, and Implementation Issues, May, 2004. bib pdf
Eero Hyvönen, Arttu Valo, Kim Viljanen and Markus Holi: A Logic-Based Semantic Web HTML Generator - A Poor Man s Publishing Approach. Proceedings of WWW2004, New York, Alternate Track Papers and Posters, May, 2004. bib pdf
Eero Hyvönen, Samppa Saarela and Kim Viljanen: Application of Ontology Techniques to View-Based Semantic Search and Browsing. The Semantic Web: Research and Applications. Proceedings of the First European Semantic Web Symposium (ESWS 2004), 2004. bib pdf
Eero Hyvönen, Samppa Saarela, Kim Viljanen, Eetu Mäkelä, Arttu Valo, Mirva Salminen, Suvi Kettula and Miikka Junnila: A Cultural Community Portal for Publishing Museum Collections on the Semantic Web. Proceedings of 16th European Conference on Artificial Intelligence (ECAI2004), Workshop on Application of Semantic Web Technologies to Web Communities, 2004. bib pdf
This paper presents a deployed semantic web application in the cultural domain: the semantic portal MUSEUMFINLAND. It is a demonstration of a community portal and a publication channel by which heterogeneous collection database contents of different museums can be published on the Semantic Web. By semantic web techniques, it is possible to make collections semantically interoperable and provide the museum visitors with intelligent content-based search and browsing services to the global collection base.
Eero Hyvönen, Miikka Junnila, Suvi Kettula, Eetu Mäkelä, Samppa Saarela, Mirva Salminen, Ahti Syreeni, Arttu Valo and Kim Viljanen: Finnish Museums on the Semantic Web. User s Perspective on MuseumFinland. Proceedings of Museums and the Web 2004 (MW2004), 2004. bib
This paper presents a semantic portal, MuseumFinland, for publishing heterogeneous museum collections on the Semantic Web. The application is presented from the viewpoints of the end-user and the museums providing the contents. By semantic Web techniques, it is possible to make collections semantically interoperable and provide museum visitors with intelligent content-based search and browsing services to the global collection base. By using the MuseumFinland approach, the museums with their semantically rich and interrelated collection content can create consolidated semantic collection portals together on the Web.
Eero Hyvönen, Samppa Saarela, Kim Viljanen, Eetu Mäkelä, Arttu Valo, Mirva Salminen, Suvi Kettula and Miikka Junnila: A Semantic Portal for Publishing Museum Collections on the Web. Proceedings of ECAI/PAIS 2004, 2004. bib pdf
This paper presents the semantic portal MUSEUMFINLAND for publishing museum collections on the Semantic Web. It is shown how museums with their semantically rich and interrelated collection content can create a large, consolidated semantic collection portal together on the web. By semantic web techniques, it is possible to make collections semantically interoparable and provide the museum visitors with inntelligent content-based search and browsing services to the global collection base.
2003
Eero Hyvönen, Samppa Saarela and Kim Viljanen: Ontogator: Combining View- and Ontology-Based Search with Semantic Browsing. Proceedings of XML Finland 2003, Kuopio, Finland, October 30-31, 2003. Paper presented at the international SEPIA Conference, Helsinki, Sept. 18-20, 2003. bib pdf
Eero Hyvönen, Miikka Junnila, Suvi Kettula, Samppa Saarela, Mirva Salminen, Ahti Syreeni, Arttu Valo and Kim Viljanen: Publishing Collections in the Finnish Museums on the Semantic Web Portal - First Results. Proceedings of XML Finland 2003, Kuopio, Finland, October 30-31, 2003. Paper presented at the symposium Arts and Humanities in the Digital Domain: Towards Web based Culture and Science, Salzburg, Austria, Oct. 6-7, 2003. bib pdf
Eero Hyvönen, Arttu Valo, Kim Viljanen and Markus Holi: Publishing Semantic Web Content as Semantically Linked HTML Pages. Proceedings of XML Finland 2003, Kuopio, Finland, October 30-31, 2003. bib pdf
Eero Hyvönen, Kim Viljanen and Antti Hätinen: Yellow Pages on the Semantic Web. Proceedings of WWW2003, Budapest, Hungary, May, 2003. Poster papers. bib html
Eero Hyvönen, Samppa Saarela, Avril Styrman and Kim Viljanen: Ontology-Based Image Retrieval. Proceedings of WWW2003, Budapest, Hungary, May, 2003. Poster papers. bib html
Eero Hyvönen, Suvi Kettula, Vilho Raatikka, Samppa Saarela and Kim Viljanen: Finnish Museums on the Semantic Web. Proceedings of WWW2003, Budapest, Hungary, May, 2003. Poster papers. bib html
2002
Eero Hyvönen, Petteri Harjula and Kim Viljanen: Representing metadata about web resources. Semantic Web Kick-Off in Finland - Vision, Technologies, Research, and Applications, pp. 47-76, 2002. bib
Eero Hyvönen, Suvi Kettula, Vilho Raatikka, Samppa Saarela and Kim Viljanen: Semantic Interoperability on the Web: Case Finnish Museums Online. Towards the semantic web and web services, Proceedings of XML Finland 2002 Conference, pp. 41-53, Helsinki, Finland, October 21-22, 2002. bib pdf
Eero Hyvönen, Kim Viljanen and Antti Hätinen: Yellow Pages on the Semantic Web. Towards the semantic web and web services, Proceedings of XML Finland 2002 Conference, pp. 3-14, Helsinki, Finland, October 21-22, 2002. bib pdf
(total: 64 publications)
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