Analysis of Schema.org at Five Levels of KR

We demonstrate how the five levels of knowledge representation manifest with an ontology like schema.org. We provide an overview of schema.org at the conceptual level, epistemological level, logical level from a frame logic (F-logic) and first-order logic (FOL) perspective, and, finally, at the implementation level to show how it is encoded with Resource Description Framework (RDF) serialization formats.