Knowledge Model
Declare meaning, containment, and relationships independently.
Ontology specifies the kinds and fields a corpus permits. Topology specifies containment and tier shape. A graph consists of actual nodes and edges, with declared sources and readers. These axes are orthogonal: a graph can be structurally valid yet semantically invalid, or the reverse. Conformance compares authored declarations to instances in both directions.
Ontology
Kinds and their required properties
Topology
Permitted containment and tier shape
Graph
Instances, edges, provenance, and readers
Declared Graphs
Explicit sources and independent readers