SampoSampo Knowledge Graph

SampoSampo: Connecting Everything to Everything Else

Leonardo da Vinci (1452-1519) has said: "Learn how to see. Realize that everything connects to everything else". This wisdom is very true regarding Cultural Heritage (CH) data due to its rich linkedness, and regarding Linked Open Data (LOD), where enriching data by linking is the great underlying promise. SampoSampo - "the Mother of other Sampos and beyond" aims to adress the challenge set by Leonardo da Vinci by interlinking data about historical Finnish people, organizations, places, and events from a variety of other Sampo systems including

AcademySampo,

BiographySampo,

BookSampo,

Vanhat Norssit Sampo,

LetterSampo Finland (1809-1917),

ArtSampo,

WarSampo,

ParliamentSampo, and

OperaSampo,

and various other data sources:

Wikidata,

KANTO authority files,

YSO Places,

ISNI,

Wikipedia,

Geneanet and Geni genealogy services,

WikiTree,

ULAN registry provided by Getty Research, and

HISTO - Finnish history ontology.

In the SampoSampo project the Sampo series of mutually related CH LOD services and semantic portals based on the so-called Sampo model are considered. The Sampo model itself is used to establish an entity alignment LOD service on top of which a meta-level Sampo, SampoSampo, is created, based on different Sampo systems and related datasets and KGs. For searching entities globally, faceted semantic search on aligned entities is used, and for searching and discovering new connections between entities, faceted search is applied to knowledge-based relational search on explainable connections between entities, a step toward the "Web of Wisdom".

The SampoSampo is part of the national FIN-CLARIAH research infrastructure in Finland, and was published in 2026.