> ## Documentation Index
> Fetch the complete documentation index at: https://wiki.platelunchcollective.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Subgraph

> A subgraph is a subset of a larger knowledge graph focused on a specific entity or topic domain — used by AI systems to reason about relationships within a b...

*Technical implementation* · *Entity & Knowledge Graph*

## Definition

A subgraph is a subset of a larger knowledge graph focused on a specific entity or topic domain — used by AI systems to reason about relationships within a bounded context. A brand's entity subgraph includes the brand entity, its associated people, products, locations, and topics, and the relationships between them.

## Why It Matters for AI Search

Building a rich entity subgraph means establishing not just the brand's own entity record but the network of verified relationships around it — founder entities with Person schema, product entities with Product schema, location entities with geographic associations. The denser and more accurate the entity subgraph, the more context AI systems have for accurate brand characterization across a wider range of queries.

## Related Terms

<CardGroup cols={2}>
  <Card title="Knowledge graph" href="/ai-search-glossary/knowledge-graph" />

  <Card title="Entity graph" href="/ai-search-glossary/entity-graph" />

  <Card title="sameAs array" href="/ai-search-glossary/sameas-array" />

  <Card title="Semantic triple" href="/ai-search-glossary/semantic-triple" />

  <Card title="Entity linking" href="/ai-search-glossary/entity-linking" />
</CardGroup>

## Relevant Plate Lunch Collective Services

[Entity SEO](https://www.platelunchcollective.com/services/entity-seo)  [Context Map](https://www.platelunchcollective.com/services/context-map)  [AI SEO](https://www.platelunchcollective.com/services/ai-seo)