Towards improving Wikidata reuse with emerging patterns

The ontology underlying Wikidata has not been formalized. Instead, its semantics emerges from the use of its classes and properties. Flexible rules and suggestions have been defined by the Wikidata project for the use of its ontology, however, it is still often difficult to reuse the ontology's constructs. In this paper, we describe a method for extracting emerging patterns from (a domain-specific portion of) Wikidata, in the form of statistically frequent domain-property-range triplets. We show the results of our experiments on a Wikidata subset addressing the music domain, and compare them with the current support present in Wikidata. These patterns can provide guidance for the use of the Wikidata ontology and its potential improvement.</p

An ontology design pattern for representing recurrent events

In this paper we describe an Ontology Design Pattern for modeling events that recur regularly over time and share some invariant factors, which unify them conceptually. The proposed pattern appears to be foundational, since it models the top-level domain-independent concept of recurrence, as applied to a series of events: we refer to this type of events as recurrent event series. The pattern relies on existing patterns, i.e. Collection, Situation, Classification, Sequence. Indeed, a recurrent event is represented as both a collection of events and a situation in which these events are contextualized and unified according to one or more properties that are peculiar to each event, and occur at regular intervals. We show how this pattern has been used in the context of ArCo, the Knowledge Graph of Italian cultural heritage, in order to model recurrent cultural events, festivals, ceremonies

Atlas of paths: A formal ontology of historical pathways in Italy

The Atlas of Paths project has two main goals: (i) the creation and implementation of an ontology network representing information contained in the MiBACT\u2019s Atlante dei Cammini d\u2019Italia and defining the concept of path; (ii) the design of a prototype for a modular software platform allowing the production of the Atlante Linked Open Data as foreseen in its ontological formalization