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Jouni Tuominen

Doctoral Candidate, M.Sc.
(M.Sc. in Computer Science, University of Helsinki)

phone: +358 50 431 6071 (office)
email: firstname.lastname@aalto.fi
room: 3578 @ Department of Media Technology
postal address: Department of Media Technology,
P.O. Box 15500, FI-00076 Aalto, Finland

Currently working in the Linked Data Finland project.

Publications

Submitted papers

Matias Frosterus, Jouni Tuominen, Sini Pessala and Eero Hyvönen: Linked Open Ontology Cloud - Managing a System of Interlinked Cross-domain Light-weight Ontologies. 2014. Submitted. bib pdf

2014

Matias Frosterus, Jouni Tuominen and Eero Hyvönen: Facilitating Re-use of Legal Data in Applications--Finnish Law as a Linked Open Data Service. Proceedings of the 27th International Conference on Legal Knowledge and Information Systems (JURIX 2014), IOS Press, Krakow, Poland, December, 2014. bib pdf
Osma Suominen, Sini Pessala, Jouni Tuominen, Mikko Lappalainen, Susanna Nykyri, Henri Ylikotila, Matias Frosterus and Eero Hyvönen: Deploying National Ontology Services: From ONKI to Finto. Proceedings of the ISWC 2014 industry track, Riva del Garda, Italy, October, 2014. bib pdf
The Finnish Ontology Library Service ONKI was published as a living laboratory prototype for public use in 2008. Its idea is to support content indexers and ontology developers via a browser interface and machine APIs. ONKI has been well-accepted, but being a prototype maintained by the ending research project FinnONTO (2003–2012), a more sustainable service was needed, supported by permanent governmental funding. To achieve this, ONKI was deployed and is being further developed by the National Library of Finland into a new national vocabulary service Finto. We discuss challenges in the deployment of ONKI into Finto and lessons learned during the transition process.
Nina Laurenne, Jouni Tuominen, Hannu Saarenmaa and Eero Hyvönen: Making species checklists understandable to machines - a shift from relational databases to ontologies. Journal of Biomedical Semantics, vol. 5, no. 40, September, 2014. bib pdf link
Eero Hyvönen, Jouni Tuominen, Miika Alonen and Eetu Mäkelä: Linked Data Finland: A 7-star Model and Platform for Publishing and Re-using Linked Datasets. Proceedings of ESWC 2014 Demo and Poster Papers, Springer-Verlag, May, 2014. bib pdf

2013

Eero Hyvönen, Miika Alonen, Jouni Tuominen, and Eetu Mäkelä: Linked Data Finland: Towards a 7-star Service Platform for Linked Datasets. The First Annual KnowEscape Conference - KnowEscape 2013, Espoo, Finland, November, 2013. bib pdf
Jouni Tuominen, Nina Laurenne, Mikko Koho and Eero Hyvönen: The Birds of the World Ontology AVIO. The Semantic Web: ESWC 2013 Satellite Events, pp. 300-301, Springer-Verlag, Berlin Heidelberg, Montpellier, France, May 26-30, 2013. bib pdf
We present an ontology for managing the scientific and common names of birds. The ontology is based on the TaxMeOn meta-ontology model for biological names. The ontology is in use as an ontology service and it has been applied in a bird watching system.
Matias Frosterus, Jouni Tuominen, Mika Wahlroos and Eero Hyvönen: The Finnish Law as a Linked Data Service. The Semantic Web: ESWC 2013 Satellite Events, pp. 289-290, Springer-Verlag, Berlin Heidelberg, Montpellier, France, May 26-30, 2013. bib pdf
Juridical information is important to organizations and individuals alike and is linked to from all walks of life. The Finnish government has published the Finlex Data Bank for searching and browsing legislation documents. However, the data there is not yet open, is based on a traditional XML schema, and does not conform to new semantic metadata standards. There are many difficulties in maintaining and using the site in, e.g., data harvesting, interoperability, querying, and linking that could be mitigated by the Semantic Web technologies. This paper presents an approach and a project—including first results—for publishing and using Finnish legislation as a 5-star Linked Open Data service.
Matias Frosterus, Jouni Tuominen, Sini Pessala, Katri Seppälä and Eero Hyvönen: Linked Open Ontology Cloud KOKO--Managing a System of Cross-domain Lightweight Ontologies. The Semantic Web: ESWC 2013 Satellite Events, pp. 296-297, Springer-Verlag, Berlin Heidelberg, Montpellier, France, May 26-30, 2013. bib pdf
Jouni Tuominen, Nina Laurenne and Eero Hyvönen: Publishing and Using Plant Names as an Ontology Service. Proceedings of the first international Workshop on Semantics for Biodiversity (S4BioDiv), ESWC 2013, CEUR Workshop Proceedings, Vol 979, http://www.ceur-ws.org/Vol-979, Montpellier, France, May, 2013. bib pdf
Animals and plants are referred to using scientific or common names depending on the expertise of an audience or a source of data. The names change in time and therefore their usage as identifiers as such is problematic. We present a solution for managing and using plant names as an ontology. The ontology is based on the TaxMeOn meta-ontology for biological names. In order to refer to organisms unambiguously and publish information as Linked Data on the web, the names are given URIs. The ontology is developed collaboratively and it supports the approval process and temporal tracking of the common names. We introduce an ontology service of plant names for end-users and provide user interfaces and APIs for integrating the ontology into applications.
Eero Hyvönen, Miika Alonen, Mikko Koho and Jouni Tuominen: BirdWatch--Supporting Citizen Scientists for Better Linked Data Quality for Biodiversity Management. Proceedings of the first international Workshop on Semantics for Biodiversity (S4BioDiv), ESWC 2013, CEUR Workshop Proceedings, Vol 979, http://www.ceur-ws.org/Vol-979, Montpellier, France, May, 2013. bib pdf
Observational data about species of public interest, such as birds and butterflies, is often created and collected by volunteered citizen scientists, and used by professionals for managing biodiversity. The education and skills of the citizens participating in the work varies a lot, and the process of making observations is typically not systematic but rather ad hoc. As a result, the quality of the observational data in repositories, such as the Global Biodiversity Information Facility GBIF Data Portal, is often not good, hampering its utilization severely. This paper presents an approach for enhancing data quality in a citizen science setting, and presents a mobile tool BirdWatch for citizen observers, mitigating difficulties in producing high quality Linked Data for biodiversity management.

2012

Jouni Tuominen, Nina Laurenne and Eero Hyvönen: An Ontology Model and Service for Managing Scientific and Common Names of Plants. Poster and Demo proceedings of the 2nd Joint International Semantic Technology Conference (JIST2012), Nara, Japan, December, 2012. bib pdf
Osma Suominen, Alex Johansson, Henri Ylikotila, Jouni Tuominen and Eero Hyvönen: Vocabulary Services Based on SPARQL Endpoints: ONKI Light on SPARQL. Poster proceedings of the 18th International Conference on Knowledge Engineering and Knowledge Management (EKAW 2012), Galway, Ireland, October, 2012. bib pdf
Kim Viljanen, Jouni Tuominen, Eetu Mäkelä and Eero Hyvönen: Normalized Access to Ontology Repositories. Proceedings of the Sixth International Conference on Semantic Computing (IEEE ICSC 2012), IEEE Press, Palermo, Italy, September, 2012. bib pdf
Jouni Tuominen, Kim Viljanen and Eero Hyvönen: Ontologiapalvelut semanttisessa webissä (Ontology services on the Semantic Web). (in Finnish), Tietojenkäsittelytiede, no. 34, pp. 17-36, Tietojenkäsittelytieteen Seura ry, April, 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

Nina Laurenne, Jouni Tuominen and Eero Hyvönen: Radiation of beetles into cyberspace - two case studies of modelling taxonomic information. TDWG 2011 Annual Conference of the Taxonomic Databases Working Group, New Orleans, Lousiana, USA, October, 2011. Poster abstract. bib pdf
Nina Laurenne, Jouni Tuominen, Katharina Schleidt and Eero Hyvönen: Observing observations - an ontology-based approach for improving the reliability of biodiversity data. TDWG 2011 Annual Conference of the Taxonomic Databases Working Group, New Orleans, Lousiana, USA, October, 2011. Poster abstract. bib pdf
Sini Pessala, Katri Seppälä, Osma Suominen, Matias Frosterus, Jouni Tuominen and Eero Hyvönen: MUTU: An Analysis Tool for Maintaining a System of Hierarchically Linked Ontologies. ISWC 2011 - Ontologies come of Age Workshop (OCAS), Bonn, Germany, October, 2011. bib pdf
We consider ontology evolution in a system of light-weight Linked Data ontologies, aligned with each other to form a larger ontology system. When one ontology changes, the human editor must keep track of the actual changes and of the modifications needed in the related ontologies in order to keep the system consistent. This paper presents an analysis tool MUTU, by which such changes and their potential effects on other ontologies can be found. Such an analysis is useful for the ontology editors for understanding the differences between ontology versions, and for updating linked ontologies when changes occurred in other components of an ontology system.
Nina Laurenne, Jouni Tuominen, Arto Mertaniemi, Hannu Saarenmaa and Eero Hyvönen: LSID versus HTTP URI: Two approaches and e-infrastructures for managing information about taxon names. EIM 2011 Conference, Santa Barbara, California, USA, September, 2011. Poster abstract. bib pdf
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.
Jouni Tuominen, Nina Laurenne and Eero Hyvönen: Biological Names and Taxonomies on the Semantic Web - Managing the Change in Scientific Conception. Proceedings of the 8th Extended Semantic Web Conference (ESWC 2011), Springer-Verlag, Heraklion, Greece, June, 2011. bib pdf
Biodiversity management requires the usage of heterogeneous biological information from multiple sources. Indexing, aggregating, and finding such information is based on names and taxonomic knowledge of organisms. However, taxonomies change in time due to new scientific findings, opinions of authorities, and changes in our conception about life forms. Furthermore, organism names and their meaning change in time, different authorities use different scientific names for the same taxon in different times, and various vernacular names are in use in different languages. This makes data integration and information retrieval difficult without detailed biological information. This paper introduces a meta-ontology for managing the names and taxonomies of organisms, and presents three applications for it: 1) publishing biological species lists as ontology services (ca. 20 taxonomies including more than 80,000 names), 2) collaborative management of the vernacular names of vascular plants (ca. 26,000 taxa), and 3) management of individual scientific name changes based on research results, covering a group of beetles. The applications are based on the databases of the Finnish Museum of Natural History and are used in a living lab environment on the web.
Eero Hyvönen, Jouni Tuominen, Tomi Kauppinen, Jari Väätäinen: Representing and Utilizing Changing Historical Places as an Ontology Time Series. Geospatial Semantics and Semantic Web: Foundations, Algorithms, and Applications (Naveen Ashish and Amit Sheth (eds.)), Springer-Verlag, 2011. Book chapter. bib pdf

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, Matias Frosterus, Nina Laurenne and Eero Hyvönen: Publishing Biological Classifications as SKOS Vocabulary Services on the Semantic Web. TDWG 2010 Annual Conference of the Taxonomic Databases Working Group, Woods Hole, Massachusetts, USA, September, 2010. Demonstration abstract. bib pdf
Nina Laurenne, Jouni Tuominen, Mikko Koho and Eero Hyvönen: Taxon Meta-Ontology TaxMeOn - Towards an Ontology Model for Managing Changing Scientific Names in Time. TDWG 2010 Annual Conference of the Taxonomic Databases Working Group, Woods Hole, Massachusetts, USA, September, 2010. Contributed abstract. bib pdf
Nina Laurenne, Jouni Tuominen, Mikko Koho and Eero Hyvönen: Modeling and Publishing Biological Names and Classifications on the Semantic Web. TDWG 2010 Annual Conference of the Taxonomic Databases Working Group, Woods Hole, Massachusetts, USA, September, 2010. Poster abstract. bib pdf
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.
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.
Jouni Tuominen: Helppokytkentäiset ontologiapalvelut semanttisessa webissä. MSc Thesis (in Finnish), University of Helsinki, Department of Computer Science, May, 2010. bib pdf
Ontologiat luovat semanttisen webin perustan: 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 datana, tiedostomuodossa. Tällöin jokainen toimija joutuu toteuttamaan itse toiminnallisuuksia ontologioiden hyödyntämiseen. Osa toiminnallisuuksista on yleisiä, useissa järjestelmissä toistuvia, kuten ontologian visualisointi, selaaminen ja käsitehaku. On kuitenkin kustannustehokkaampaa toteuttaa yleisiä ontologiatoiminnallisuuksia valmiina palveluina. Palveluita voidaan tarjota ihmiskäyttäjille käyttöliittymäkomponentteina sekä ohjelmalliseen käyttöön rajapintoina, joita käyttämällä toiminnallisuudet voidaan integroida asiakasjärjestelmiin. Lisäksi käytettäessä ontologioita palveluina toimijoiden käytössä on aina ontologioiden ajantasaiset versiot. Tässä tutkielmassa kuvataan ontologioiden käyttäjäryhmien -- ontologioiden kehittäjien, tiedon annotoijien, tiedon hakijoiden ja semanttisen webin sovellusten kehittäjien -- tarpeita sekä esitellään ontologioiden hyödyntämiseen kehitettyjä sovelluksia. Yleisten ontologioiden käyttämiseen liittyvien toiminnallisuuksien tarjoamiseksi esitetään ontologiapalvelu ONKI, joka julkistettiin virallisesti käyttöön syyskuussa 2008.

2009

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.
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.
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.
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
Tomi Kauppinen, Heini Kuittinen, Jouni Tuominen, Katri Seppälä and Eero Hyvönen: Extending an Ontology by Analyzing Annotation Co-occurrences in a Semantic Cultural Heritage Portal. Proceedings of the ASWC 2008 Workshop on Collective Intelligence (ASWC-CI 2008) organized as a part of the 3rd Asian Semantic Web Conference (ASWC 2008), Bangkok, Thailand, February 2-5, 2009. bib pdf
Ontologies aim to capture knowledge about things and their relationships. Publishing ontologies on the Semantic Web enables people and organizations to use shared ontologies in annotating e.g. photographs, videos, music, and other types of cultural objects. Search engines also use relationships provided by ontologies in semantic search, e.g. for query expansion or for view-based search. However, building ontologies is a time-consuming process, and it should be helped by automatic finding of interesting, possible relationships. Finding the correct concept for annotation purposes is helped by subsumption and partonomy hierarchies and associative relationships. In this paper we show how an analysis of co-occurrences of concepts in annotations can be used to provide interesting relationships for enriching ontological structures. We use association rule mining techniques and test the idea using a set of annotations of cultural objects in CULTURESAMPO portal and the Finnish General Upper Ontology YSO. The results are visualized in the ONKI SKOS browser to give an additional layer on top of the original relationships of the YSO ontology. An analysis shows that best ranked relationships should also be included in the ontology as subclassof or associative relationships.

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.
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.
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.
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.
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, 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.
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.

(total: 49 publications)

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