<hi xmlns="http://www.tei-c.org/ns/1.0" style="font-size:12pt" xml:space="preserve">In addition to usage of the graph database for curation of the </hi> <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic" style="font-size:12pt">positiones</hi> <hi xmlns="http://www.tei-c.org/ns/1.0" style="font-size:12pt" xml:space="preserve">, the research group is in the process of developing an ontology for modelling the historical changes of the legal administrative institutions, which appear in the data, with special attention to dioceses, which are of fundamental importance in our context as they represent the basic object in legal administrative structure of the Catholic Church. These data will be available as a knowledge graph. Using the Semantic Web technologies, we constructed an event-based ontology with </hi> <hi xmlns="http://www.tei-c.org/ns/1.0" rend="background(white)" style="font-size:12pt" xml:space="preserve">key elements (Event, Time, Place, Institution, Source) </hi> <hi xmlns="http://www.tei-c.org/ns/1.0" style="font-size:12pt" xml:space="preserve">that trace legal administrative events and changes of each diocese quoted in the </hi> <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic" style="font-size:12pt">positiones</hi> <hi xmlns="http://www.tei-c.org/ns/1.0" style="font-size:12pt" xml:space="preserve">. </hi>