Agentic AI Reference Architecture

Knowledge & Data · Data store

Property Graph Store

Data storeKnowledge & DataKnowledge & Dataarc:PropertyGraphStore

A knowledge graph store using the property graph model, with labelled nodes and typed directed edges that both carry key-value properties.

Responsibility. Stores labelled nodes and typed edges carrying key-value properties.

Also known as: Labeled Property Graph

Variant of Knowledge Graph Store abstract

When to choose. Choose when rapid development and schema flexibility (properties on nodes and edges, multiple labels, schema evolution) matter more than formal semantics; the industry-standard choice for agent systems.

specializesalternative toKnowledge Graph Store: specializesKnowledge Graph StoreRDF Triple Store: alternative toRDF Triple Store
Direct neighbourhood (hover for relationship types)

Relationships

alternative to variability

Classification

Patterns
Property graph model
Technologies
Neo4jTigerGraphAmazon NeptuneNeo4j (Cypher)
Quality attributes
Maintainability (ISO/IEC 25010)Flexibility (ISO/IEC 25010)

Sources

  1. Ch1.7A: T. Nguyen, "Relational Reasoning with Knowledge Graphs - The Fundamentals, Integration, and Extraction," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 1.7A. ISBN: 9798244538229.
  2. Ch5.8: T. Nguyen, "Semantic Memory," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 5.8. ISBN: 9798244538229.