Combining Faceted Search with Data-analytic Visualizations on Top of a SPARQL Endpoint

This paper discusses practical experiences on creating data-analytic visualizations in a browser, on top of a SPARQL endpoint based on the results of faceted search. Four use cases related to Digital Humanities research in proposography are discussed where the SPARQL Faceter tool was used and extended in different ways. The Faceter tool allows the user to select a group of people with shared properties, e.g., people with the same place of birth, gender, profession, or employer. The filtered data can then be visualized, e.g., as column charts, with business graphics, sankey diagrams, or on a map. The use cases examine the potential of visualization as well as automated knowledge discovery in Digital Humanities research.Peer reviewe

Sampo-UI: A Full Stack JavaScript Framework for Developing Semantic Portal User Interfaces

This paper presents a new software framework, SAMPO-UI, for developing user interfaces for semantic portals. The goal is to provide the end-user with multiple application perspectives to Linked Data knowledge graphs, and a two-step usage cycle based on faceted search combined with ready-to-use tooling for data analysis. For the software developer, the SAMPO-UI framework makes it possible to create highly customizable, user-friendly, and responsive user interfaces using current state-of-the-art JavaScript libraries and data from SPARQL endpoints, while saving substantial coding effort. SAMPO-UI is published on GitHub under the open MIT License and has been utilized in several internal and external projects. The framework has been used thus far in creating six published and five forth-coming portals, mostly related to the Cultural Heritage domain, that have had tens of thousands of end-users on the Web.Peer reviewe

Using Linked Data for Prosopographical Research of Historical Persons : Case U.S. Congress Legislators

This paper shows how biographical registries can be represented as Linked Data, enriched by data linking to related data sources, and used in Digital Humanities. As a use case, a database of 11 987 historical U.S. Congress Legislators in 1789–2018 was transformed into a knowledge graph. The data was published as a Linked Data service, including a SPARQL endpoint, on top of which tools for biographical and prosopographical research are implemented. A faceted browser named U.S. Congress Prosopographer with visualization tools for knowledge discovery is presented to provide new insights in political history.Peer reviewe

U.S. Congress Prosopograher - A Tool for Prosopographical Research of Legislators

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U.S. Congress prosopographer - A tool for prosopographical research of legislators

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Semantic National Biography of Finland

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Integrating Prisoners of War Dataset into the WarSampo Linked Data Infrastructure

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Reassembling the Republic of Letters - A Linked Data Approach

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Knowledge-based Relation Discovery in Cultural Heritage Knowledge Graphs

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Building Lightweight Ontologies for Faceted Search with Named Entity Recognition: Case WarMemoirSampo

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