What is Entity Store?
An entity store is a database or storage system specifically designed for maintaining structured information about entities and their attributes. Unlike general-purpose databases, entity stores are optimized for the patterns common in entity-centric applications: creating entity records, updating attributes, querying entities by properties, and potentially navigating relationships between entities. They provide the persistence layer for entity memory systems.
Entity stores can be implemented using various backend technologies. Simple implementations might use key-value stores or document databases where each entity is a document containing its attributes. More sophisticated approaches use graph databases that natively support entity relationships, or specialized knowledge graph stores that can represent complex entity-attribute-relationship structures. The choice depends on requirements for relationship querying, scale, and integration with other system components.
In agent architectures, the entity store serves as the long-term memory for facts about entities encountered during operation. As the agent processes conversations, reads documents, or gathers information, entity extraction populates the entity store with structured knowledge. This enables the agent to maintain consistent, updateable knowledge that persists across sessions and can be efficiently queried when the agent needs to recall information about specific people, places, or concepts.