Formal Representation and Extraction of Perspectives

Perspectivisation is a pervasive cognitive phenomenon, and the current state of the Web and virtual communication intensifies its personal and social consequences, requiring appropriate modeling to be studied at scale, computationally. A perspective is also an entity we need to talk about as soon as a knowledge graph of facts is perspectivised, and new facts/perspectives are extracted, e.g. from discourse or a movie. This chapter describes a landscape of perspective research, presents a formal ontology of Cognitive Perspectivisation (CP) based on frame semantics and multilayered knowledge graphs, and shows how to operationalise CP with respect to viewpoints in political spinning. A discussion of the current techniques to automate the pipeline of extraction, representation, and reasoning with CP and hybrid methods concludes the work.