Fig. 1

Basic semantic expression of RDF data model. a RDF data model is based on the simple expression in a “triple” which is a set of three entities, subject, predicate and object to describe resources in the WWW. Subjects and predicates are addressed in URIs. An object is addressed in an URI or text. b An example of RDF data model forming a knowledge graph describing a mouse mutant represented in multiple triples. Each URIs are represented with abbreviations (prefixes) listed in the box at the bottom part. Note that most URIs were defined outside RIKEN (as common vocabularies). Upper parts of the graph describe rbrc:10764 named as “C57BL/6-Shh < tm1Tshir>/Ms” with identifier “RBRC10764” has a mutation in the Shh gene of Mus musculus. The blank node is an anonymous record representing a genomic feature of C57BL/6-Shh < tm1Tshir>/Ms. (rbrc:10764). Lower part describes Shh is a homolog of the SHH gene of Homo sapiens