The Platonic work, extended to a lot of dialogues, could be used among others as an analytical instruction of the nature of participation given through various types of predication relations. This article focuses on the identification of the implicit and explicit predications (seen as participations) dispersed in the Platonic work. Nine distinct categories have been found and each of then is comprised of certain structures, carrying distinguishable meanings. Ordinary predication, Pauline predication, identity, difference, otherness and definition are included, while the various senses of self-predication and self-participation are presented. Lastly, concept maps of mutual relations between selected ideas are exhibited in a software ontology environment.