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Heikki Rantala

email: firstname.lastname@aalto.fi
room: B126 @ Department of Computer Science, Computer Science Building, Konemiehentie 2, Espoo
postal address: Department of Computer Science,
P.O. Box 15400, FI-00076 Aalto, Finland

Publications

2024

Eljas Oksanen, Frida Ehrnsten, Heikki Rantala and Eero Hyvönen: Semantic Solutions for Democratising Archaeological and Numismatic Data Analysis. ACM Journal of Computing and Cultural Heritage, vol. 16, no. 4, Association for Computing Machinery, 2024. bib pdf link
Eero Hyvönen, Laura Sinikallio, Petri Leskinen, Senka Drobac, Rafael Leal, Matti La Mela, Jouni Tuominen, Henna Poikkimäki and Heikki Rantala: Publishing and Using Parliamentary Linked Data on the Semantic Web: ParliamentSampo System for Parliament of Finland. Semantic Web, January, 2024. In open review. bib pdf
Eero Hyvönen, Hien Cao, Rafael Leal, Heikki Rantala and Aki Hietanen: Searching and analyzing cross-border multilingual legislation on the Semantic Web. Proceedigs of ESWC 2024, Posters and Demo papers, Springer, 4, 2024. Accepted, forth-coming. bib pdf
Eero Hyvönen, Eljas Oksanen, Heikki Rantala and Jouni Tuominen: Kansalaistiedettä Helsingin yliopistossa - Löytösampo kokoaa kansalaisten arkeologiset löydöt semanttisessa webissä. 2024. Blogi-kirjoitus. bib pdf link
Eero Hyvönen, Hien Cao, Rafael Leal, Heikki Rantala and Aki Hietanen: Publishing, searching, and analyzing cross-border multilingual legislation on the Semantic Web. 2024. Submitted for review. bib pdf
Heikki Rantala, Petri Leskinen, Lilli Peura and Eero Hyvönen: Searching interesting relations in cultural heritage knowledge graphs. 2024. Submitted for review. bib pdf

2023

Senka Drobac, Johanna Enqvist, Petri Leskinen, Muhammad Faiz Wahjoe, Heikki Rantala, Mikko Koho, Ilona Pikkanen, Iida Jauhiainen, Jouni Tuominen, Hanna-Leena Paloposki, Matti La Mela and Eero Hyvönen: The Laborious Cleaning: Acquiring and Transforming 19th-Century Epistolary Metadata. Digital Humanities in the Nordic and Baltic Countries Publication, DHNB2023 Conference Proceeding, vol. 5, no. 1, pp. 248-262, University of Oslo Library, Norway, 2023. bib pdf link
Heikki Rantala, Eero Hyvönen and Petri Leskinen: Finding and explaining relations in a biographical knowledge graph based on life events: Case BiographySampo. ESWC 2023 Workshops and tutorials joint proceedings, CEUR Workshop Proceedings, 2023. Forth-coming. bib pdf
Heikki Rantala, Eero Hyvönen and Petri Leskinen: Finding relations between entities in a knowledge graph: Case artists of the Getty Union List of Artist Names (ULAN). 2023. Submitted for review. bib pdf
Eero Hyvönen, Annastiina Ahola, Heikki Rantala and Anne Kauppala: OperaSampo – Opera and Music Theatre Performances in Finland 1830–1960 on the Semantic Web. Proceedings of the ISWC 2023 Posters, Demos and Industry Tracks: From Novel Ideas to Industrial Practice co-located with 21st International Semantic Web Conference (ISWC 2023) (Irini Fundulaki, Kouji Kozaki, Jose Manuel Gomez-Perez and Daniel Garijo (eds.)), CEUR Workshop Proceedings, November, 2023. bib pdf
Annastiina Ahola, Eero Hyvönen, Heikki Rantala and Anne Kauppala: Publishing and studying historical opera and music theatre performances on the Semantic Web: case OperaSampo 1830–1960. Proceedings of SWODCH 2023. Semantic Web and Ontology Design for Cultural Heritage. Co-located with the 22nd International Semantic Web Conference (ISWC 2023) in Athens, Greece, CEUR Workshop Proceedings, Vol-3540, November, 2023. bib pdf link
Heikki Rantala, Annastiina Ahola, Esko Ikkala and Eero Hyvönen: How to create easily a data analytic semantic portal on top of a SPARQL endpoint: introducing the configurable Sampo-UI framework. VOILA! 2023 Visualization and Interaction for Ontologies, Linked Data and Knowledge Graphs 2023, CEUR Workshop Proceedings, Vol. 3508, October, 2023. bib pdf link
Eero Hyvönen, Patrik Boman, Heikki Rantala, Annastiina Ahola and Petri Leskinen: Promootiosampo - Helsingin yliopiston filosofisen tiedekunnan 100 promootiota 1643-2023 semanttisessa webissä. Aalto-yliopisto ja Helsingin yliopisto, Semanttisen laskennan tutkimusryhmä (SeCo), October, 2023. Artikkelin käsikirjoitus, arvioitavana. bib pdf
Eero Hyvönen, Laura Sinikallio, Petri Leskinen, Senka Drobac, Rafael Leal, Matti La Mela, Jouni Tuominen, Henna Poikkimäki and Heikki Rantala: Plenary Speeches of the Parliament of Finland as Linked Open Data and Data Services. Joint Proceedings of the Second International Workshop on Knowledge Graph Generation From Text and the First International BiKE Challenge co-located with 20th Extended Semantic Conference (ESWC 2023), pp. 1-20, CEUR Workshop Proceedings, Vol. 3447, August, 2023. bib pdf link
Annastiina Ahola, Eero Hyvönen and Heikki Rantala: A User Interface Model for Digital Humanities Research: Case BookSampo – Finnish Fiction Literature on the Semantic Web. Proceedings of ESWC 2023, poster and demo papers, Springer-Verlag, June, 2023. bib pdf
Annastiina Ahola, Eero Hyvönen and Heikki Rantala: A User Interface Model for Digital Humanities Research: Case BookSampo – Finnish Fiction Literature on the Semantic Web. Proceedings of ESWC 2023, poster and demo papers, Springer-Verlag, June, 2023. bib
Eero Hyvönen, Petri Leskinen and Heikki Rantala: Integrating Faceted Search with Data Analytic Tools in the User Interface of ParliamentSampo - Parliament of Finland on the Semantic Web. The Semantic Web: ESWC 2023 Satellite Events, pp. 16-21, Sringer-Verlag, June, 2023. bib pdf
Frida Erhnsten, Eljas Oksanen, Heikki Rantala and Eero Hyvönen: DigiNUMA ja Rahasampo – uusi digitaalinen palvelu rahalöydöistä kiinnostuneille. Numismaattinen aikakausilehti, April, 2023. bib pdf link
Eero Hyvönen, Petri Leskinen, Laura Sinikallio, Senka Drobac, Rafael Leal, Matti La Mela, Jouni Tuominen, Henna Poikkimäki and Heikki Rantala: ParliamentSampo Infrastructure for Publishing the Plenary Speeches and Networks of Politicians of the Parliament of Finland as Open Data Services. Aalto University, Dept. of Computer Science, February, 2023. Paper published at the publication event of the ParliamentSampo data service and portal. bib pdf

2022

Eljas Oksanen, Heikki Rantala, Jouni Tuominen, Michael Lewis, David Wigg-Wolf, Frida Ehrnsten and Eero Hyvönen: Digital Humanities Solutions for Pan-European Numismatic and Archaeological Heritage Based on Linked Open Data. DHNB 2022 The 6th Digital Humanities in Nordic and Baltic Countries Conference, pp. 352-360, CEUR Workshop Proceedings, Vol. 3232, 2022. bib pdf link
Heikki Rantala, Eljas Oksanen and Eero Hyvönen: Harmonizing and Using Numismatic Linked Data in Digital Humanities Research and Application Development: Case DigiNUMA. The Semantic Web: ESWC 2022 Satellite Events, Lecture Notes in Computer Science, vol. 13384, pp. 26-30, Springer, July, 2022. bib pdf link
Eero Hyvönen, Esko Ikkala, Mikko Koho, and Rafael Leal, Heikki Rantala and Minna Tamper: How to Search and Contextualize Scenes inside Videos for Enriched Watching Experience: Case Stories of the Second World War Veterans. The Semantic Web: ESWC 2022 Satellite Events, Lecture Notes in Computer Science, vol. 13384, pp. 163-167, Springer, July, 2022. bib pdf link
Mikko Koho, Rafael Leal, Esko Ikkala, Minna Tamper, Heikki Rantala and Eero Hyvönen: Building Lightweight Ontologies for Faceted Search with Named Entity Recognition: Case WarMemoirSampo. Proceedings of the 1st International Workshop on Knowledge Graph Generation From Text and the 1st International Workshop on Modular Knowledge co-located with 19th Extended Semantic Conference (ESWC 2022) (Sanju Tiwari, Nandana Mihindukulasooriya, Francesco Osborne, Dimitris Kontokostas, Jennifer D’Souza and Mayank Kejriwal (eds.)), vol. 3184, pp. 19-35, CEUR Workshop Proceedings, May, 2022. International Knowledge Graph Generation From Text (TEXT2KG). bib pdf link
Jouni Tuominen, Mikko Koho, Ilona Pikkanen, Senka Drobac, Johanna Enqvist, Eero Hyvönen, Matti La Mela, Petri Leskinen, Hanna-Leena Paloposki and Heikki Rantala: Constellations of Correspondence: a Linked Data Service and Portal for Studying Large and Small Networks of Epistolary Exchange in the Grand Duchy of Finland. DHNB 2022 The 6th Digital Humanities in Nordic and Baltic Countries Conference, pp. 415-423, CEUR Workshop Proceedings, Vol. 3232, March, 2022. bib pdf link
Petri Leskinen, Heikki Rantala and Eero Hyvönen: Analyzing the Lives of Finnish Academic People 1640–1899 in Nordic and Baltic Countries: AcademySampo Data Service and Portal. DHNB 2022 The 6th Digital Humanities in Nordic and Baltic Countries Conference, CEUR Workshop Proceedings, long papers, Vol. 3232, March, 2022. bib pdf link
Rafael Leal, Heikki Rantala, Mikko Koho, Esko Ikkala, Markus Merenmies and Eero Hyvönen: WarMemoirSampo: A Semantic Portal for War Veteran Interview Videos. DHNB 2022 The 6th Digital Humanities in Nordic and Baltic Countries Conference, CEUR Workshop Proceedings, long papers, Vol. 3232, March, 2022. bib pdf link
Heikki Rantala, Esko Ikkala, Jouni Tuominen, Eero Hyvönen, Ville Rohiola, Eljas Oksanen and Mikko Koho: FindSampo: A Linked Data Based Service for Analyzing and Disseminating Archaeological Finds. 6th Digital Humanities in Nordic and Baltic Countries Conference, poster paper, book of abstracts, pp. 118-119, March, 2022. bib link
Mikko Koho, Heikki Rantala and Eero Hyvönen: Digital Humanities and Military History: Analyzing Casualties of the WarSampo Knowledge Graph. DHNB 2022 The 6th Digital Humanities in Nordic and Baltic Countries Conference (Karl Berglund, Matti La Mela and Inge Zwart (eds.)), vol. 3232, CEUR Workshop Proceedings, Uppsala, Sweden, March, 2022. bib pdf link
Heikki Rantala, Ilkka Jokipii, Esko Ikkala and Eero Hyvönen: WarVictimSampo 1914–1922: a National War Memorial on the Semantic Web for Digital Humanities Research and Applications. ACM Journal on Computing and Cultural Heritage, vol. 15, no. 1, ACM, Assoc. of Computing Machinery, February, 2022. bib pdf link
Esko Ikkala, Eero Hyvönen, Heikki Rantala and Mikko Koho: Sampo-UI: A Full Stack JavaScript Framework for Developing Semantic Portal User Interfaces. Semantic Web – Interoperability, Usability, Applicability, vol. 13, no. 1, pp. 69-84, January, 2022. Online version published in 2021, print version in 2022. bib pdf link
Eero Hyvönen, Petri Leskinen, Minna Tamper, Heikki Rantala, Esko Ikkala, Jouni Tuominen and Kirsi Keravuori: Linked Data – A Paradigm Shift for Publishing and Using Biography Collections on the Semantic Web. Proceedings of the Third Conference on Biographical Data in a Digital World (BD 2019), pp. 16-23, CEUR-WS Proceedings, vol. 3152, 2022. bib pdf link
Heikki Rantala, Esko Ikkala, Ville Rohiola, Mikko Koho, Jouni Tuominen, Eljas Oksanen, Anna Wessman and Eero Hyvönen: FindSampo: A Linked Data Based Portal and Data Service for Analyzing and Disseminating Archaeological Object Finds. The Semantic Web: ESWC 2022, Lecture Notes in Computer Science, vol. 13261, pp. 478-494, Springer, 2022. bib pdf link

2021

Eero Hyvönen, Petri Leskinen, Minna Tamper, Heikki Rantala, Esko Ikkala, Jouni Tuominen and Kirsi Keravuori: Biografiasampo yhdistää ja rikastaa suomalaiset elämäkerrat linkitettynä datana semanttisessa webissä (Biographysampo links and enriches Finnish biographies as linked data on the Semantic Web. Informaatiotutkimus, vol. 40, no. 3, pp. 346-368, November, 2021. bib pdf link
Heikki Rantala, Esko Ikkala, Mikko Koho, Jouni Tuominen, Ville Rohiola and Eero Hyvönen: Using FindSampo Linked Open Data Service and Portal for Spatio-temporal Data Analysis of Archaeological Finds in Digital Humanities. ISWC-Posters-Demos-Industry 2021 International Semantic Web Conference (ISWC) 2021: Posters, Demos, and Industry Tracks, CEUR Workshop Proceedings, Oct, 2021. bib pdf link
Eero Hyvönen, Heikki Rantala, Esko Ikkala, Mikko Koho, Jouni Tuominen, Babatunde Anafi, Suzie Thomas, Anna Wessman, Eljas Oksanen, Ville Rohiola, Jutta Kuitunen and Minna Ryyppö: Citizen Science Archaeological Finds on the Semantic Web: The FindSampo Framework. Antiquity, A Review of World Archaeology, vol. 95, no. 382, pp. e24, Cambridge University Press, August, 2021. bib pdf link
Heikki Rantala, Eero Hyvönen and Esko Ikkala: Creating the HISTO Ontology of Finnish History Events. Data for History 2021: Modelling Time, Places, Agents, May, 2021. Abstract. bib pdf link
Eero Hyvönen, Petri Leskinen, Heikki Rantala, Esko Ikkala and Jouni Tuominen: Akatemiasampo-portaali ja -datapalvelu henkilöiden ja henkilöryhmien historialliseen tutkimukseen (AcademySampo Portal and Data Service for Biographical and Prosopographical Research). Informaatiotutkimus, vol. 40, no. 2, pp. 28-56, May, 2021. bib pdf link
Eero Hyvönen and Heikki Rantala: Knowledge-based Relational Search in Cultural Heritage Linked Data. Digital Scholarship in the Humanities (DSH), Oxford University Press, March, 2021. Accepted. bib pdf
This paper presents a new knowledge-based approach for finding serendipitous semantic relations between resources in a knowledge graph. The idea is to characterize the notion of “interesting connection” in terms of generic ontological explanation patterns that are applied to an underlying linked data repository to instantiate connections. In this way, 1) semantically uninteresting connections can be ruled out effectively, and 2) natural language explanations about the connections can be created for the end-user. The idea has been implemented and tested based on a knowledge graph of biographical data extracted from the life stories of 13,144 prominent historical persons in Finland, enriched by data linking to collection databases of museums, libraries, and archives. The demonstrator is in use as part of the BiographySampo portal of interlinked biographies.

2020

Heikki Rantala, Esko Ikkala, Ilkka Jokipii, Mikko Koho, Jouni Tuominen and Eero Hyvönen: WarVictimSampo 1914–1922: A Semantic Portal and Linked Data Service for Digital Humanities Research on War History. The Semantic Web: ESWC 2020 Satellite Events (Harth, Andreas, Presutti, Valentina, Troncy, Raphaël, Acosta, Maribel, Polleres, Axel, Fernández, Javier D., Xavier Parreira, Josiane, Hartig, Olaf, Hose, Katja and Cochez, Michael (eds.)), Lecture Notes in Computer Science, vol. 12124, pp. 191-196, Springer-Verlag, 2020. bib pdf link
Heikki Rantala, Ilkka Jokipii, Mikko Koho, Esko Ikkala, Jouni Tuominen and Eero Hyvönen: Building a Linked Open Data Portal of War Victims in Finland 1914-1922. DHN 2020 Digital Humanities in the Nordic Countries. Proceedings of the Digital Humanities in the Nordic Countries 5th Conference, pp. 310-317, CEUR Workshop Proceedings, vol. 2612, Riga, Latvia, October, 2020. bib pdf link

2019

Lia Gasbarra, Mikko Koho, Ilkka Jokipii, Heikki Rantala and Eero Hyvönen: An Ontology of Finnish Historical Occupations. The Semantic Web: ESWC 2019 Satellite Events (Hitzler, Pascal, Kirrane, Sabrina, Hartig, Olaf, de Boer, Victor, Vidal, Maria-Esther, Maleshkova, Maria, Schlobach, Stefan, Hammar, Karl, Lasierra, Nelia, Stadtmüller, Steffen, Hose, Katja and Verborgh, Ruben (eds.)), Lecture Notes in Computer Science, pp. 64-68, Springer, Cham, Portoroz, Slovenia, June, 2019. bib pdf link
Historical datasets often impose the need to study groups of people based on occupation or social status. This paper presents first results in creating an ontology of historical Finnish occupations, AMMO, that enables selection of groups of people based on their occupation, occupational groups, or socioeconomic class. AMMO is linked to the international historical occupation classification HISCO and to a modern Finnish occupational classification for interoperability. AMMO will be used as a component in two semantic portals for Finnish war history.
Eero Hyvönen, Petri Leskinen, Minna Tamper, Heikki Rantala, Esko Ikkala, Jouni Tuominen and Kirsi Keravuori: BiographySampo - Publishing and Enriching Biographies on the Semantic Web for Digital Humanities Research. The Semantic Web. ESWC 2019 (Pascal Hitzler, Miriam Fernández, Krzysztof Janowicz, Amrapali Zaveri, Alasdair J.G. Gray, Vanessa Lopez, Armin Haller and Karl Hammar (eds.)), pp. 574-589, Springer-Verlag, June, 2019. bib pdf link
Mikko Koho, Lia Gasbarra, Jouni Tuominen, Heikki Rantala, Ilkka Jokipii and Eero Hyvönen: AMMO Ontology of Finnish Historical Occupations. Proceedings of the First International Workshop on Open Data and Ontologies for Cultural Heritage (ODOCH 19) (Antonella Poggi (ed.)), vol. 2375, pp. 91-96, CEUR Workshop Proceedings, Rome, Italy, June, 2019. bib pdf link
This paper introduces AMMO Ontology of Finnish Historical Occupations. AMMO is based on thousands of occupation labels extracted from three Finnish military historical datasets of the early 20th century: the first consists of the ca. 40 000 war-related death records around the time of the Finnish Civil War (1914–1922); the second consists of the ca. 95 000 death records of Finnish soldiers in the Winter War and Continuation War (1939–1944); the third contains the ca. 4500 records of Finnish prisoners of war in the Soviet Union during the WW2. Our goal from a Digital Humanities perspective is to use AMMO to study military history and these datasets based on the occupation and social status of the soldiers. AMMO will also be used as a component for faceted search and semantic recommendation in two semantic portals for Finnish military history. AMMO is aligned with the international historical occupation classification HISCO and with a modern Finnish occupational classification for international and national interoperability. The ontology is published as Linked Open Data in an ontology service.
Eero Hyvönen, Petri Leskinen, Minna Tamper, Heikki Rantala, Esko Ikkala, Jouni Tuominen and Kirsi Keravuori: Demonstrating BiographySampo in Solving Digital Humanities Research Problems in Biography and Prosopography. The Fourth Digital Humanities in the Nordic Countries 2019 (DHN2019), Book of Abstracts, University of Copenhagen, Copenhagen, Denmark, March, 2019. bib pdf link
Eero Hyvönen and Heikki Rantala: Knowledge-based Relation Discovery in Cultural Heritage Knowledge Graphs. DHN 2019 Digital Humanities in Nordic Countries. Proceedings of the Digital Humanities in the Nordic Countries 4th Conference, pp. 230-239, CEUR Workshop Proceedings, Vol-2364, Copenhagen, Denmark, March, 2019. bib pdf link
Heikki Rantala: Yhteyshaku semanttisessa webissä. MSc Thesis (in Finnish), University of Helsinki, Department of Computer Science, January, 2019. bib pdf
Tavallisessa haussa etsitään yksilöitä, kuten henkilöitä tai paikkoja. Joissain tilanteissa esimerkiksi historian tutkija voi olla kiinnostunut myös etsimään yhteyksiä henkilöiden ja paikkojen välillä. Tässä työssä esitetään metodi tällaisen yhteyshaun toteuttamiseksi käyttäen semanttisen webin sisältämää avointa dataa. Työssä muodostettiin graafi, joka sisältää kuvauksia Suomen kulttuu- rihistorian henkilöiden ja paikkojen välisistä kiinnostaviksi arvioiduista yhteyksistä. Graafi luotiin SPARQL CONSTRUCT -kyselyillä. Yhteyksien hakemista varten luotiin web-sovellus, joka hyödyntää fasettihakua. Tarvittavien SPARQL CONSTRUCT -kyselyjen luominen ei osoittautunut erityisen hankalaksi, mutta niiden soveltaminen yleisemmin eri aineistoihin vaatii jonkin verran työtä. Yhteyksien fasettihaku osoittautui mielenkiintoiseksi. Fasettihaku mahdollistaa haun tarkentamisen askel kerrallaan. Lisäksi yhteyksien suhteellisia määriä on mahdollista vertailla erilaisten rajausten mukaan. Tämä tarjoaa aineistoon uusia näkökulmia.
Eero Hyvönen and Heikki Rantala: Relational Search in Cultural Heritage Linked Data: A Knowledge-based Approach. Abstracts and Posters from the Digital Humanities 2019 conference, DataverseNL, Utrecht University, Utrecht, the Netherlands, 2019. bib link

2018

Eero Hyvönen, Petri Leskinen, Minna Tamper, Heikki Rantala, Esko Ikkala, Jouni Tuominen and Kirsi Keravuori: Biografiasammon tekoäly yhdistää ja rikastaa suomalaiset elämäkerrat semanttisessa webissä. Aalto-yliopisto, Semanttisen laskennan tutkimusryhmä (SeCo), Nov, 2018. bib pdf
Biografiasampo-järjestelmä käynnistää uuden aikakauden elämäkertakokoelmien julkaisemisessa ja käyttämisessä verkossa. Järjestelmän ydinaineistona on Kansallisbiografia ja muut Suomalaisen Kirjallisuuden Seuran (SKS) ja tieteellisten seurojen toimittamat pienoiselämäkerrat, yhteensä 13 100 elämäntarinaa, joita on kirjoittanut 900 suomalaista tutkijaa. Biografiasammon innovaationa on luoda kieliteknologian, tekoälyn ja semanttisen webin teknologioiden avulla elämäkertojen teksteistä ja niihin eri lähteissä liittyvistä tiedoista tietämysverkko (knowledge graph) ja kansallinen tietoinfrastruktuuri, joka koostuu miljoonista tietojen välisistä yhteyksistä. Tietämysverkko on julkaistu linkitetyn datan palvelussa, jonka varaan on toteutettu seitsemästä sovellusnäkymästä koostuva älykäs, kaikille avoin ja maksuton verkkopalvelu biografiasampo.fi kansalaisten ja digitaalisten ihmistieteiden tutkijoiden käytettäväksi.
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