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Perception vs Fact Layer 6 min readJun 16, 2026
Part 5 of 10Perception vs Fact Layer series

Perception Graph Relationship Types: isA, partOf, contradicts, supports

The AI Perception Graph uses typed edges to represent different kinds of relationships between entities and topics. The relationship type determines how the AI system uses the connection in retrieval and citation.

Not all relationships are the same. "SiteNexis is a software platform" is a classification relationship. "Machine Trust Score is part of the SiteNexis scoring system" is a composition relationship. "This page contradicts that page on entity founding date" is a contradiction relationship. The AI Perception Graph uses typed edges to distinguish these fundamentally different relationship kinds — because the type of relationship determines how the AI uses the connection.

The Eight Perception Edge Types

  • isA — classification: "X is a type of Y." Used for entity type hierarchy.
  • partOf — composition: "X is a component of Y." Used to link sub-features to primary entities.
  • relatedTo — semantic proximity: "X is related to Y." Weakest relationship type — used when a specific type cannot be determined.
  • contradicts — contradiction: "X and Y make conflicting claims about the same fact." Negative trust signal.
  • supports — corroboration: "X corroborates or reinforces a claim made by Y." Positive trust signal.
  • authorOf — attribution: "Person X authored content Y." Used for authorship trust signals.
  • locatedIn — geographic: "Entity X is located in place Y." Used for LocalBusiness entity disambiguation.
  • offers — service/product: "Organisation X offers service/product Y." Used for commercial entity modeling.

How Relationship Types Affect Retrieval

The contradicts relationship type has the most significant downstream effect. When the Perception Graph contains a contradicts edge between two perception nodes, it is a signal that AI citation eligibility should be reduced for the content involved. The AI system cannot cite both versions of a contradictory claim. The contradiction degrades the reliability of the entire content cluster around the contradicting entities, not just the specific contradicting claims.

How Relationship Types Are Inferred

The AI Perception Graph construction uses a combination of schema markup analysis (Organization, Product, Person, Place schemas map directly to entity types and relationships), entity co-occurrence analysis (entities that appear in the same chunk and the context of their co-occurrence), and Claude API semantic analysis for the top pages by PageRank. The inferred relationship type carries a confidence score that reflects how clear the evidence for that specific relationship type was.

Tags: perception graph relationship types graph edges Entity Relationships