---
slug: core-concepts/search-and-retrieval
−section: Core Concepts
−order: 7
+section: Understanding Usable
+order: 8
status: published
description: "How exact filtering, semantic search, agentic discovery, and full-content retrieval work together."
---
··· 103 unchanged lines ···
- [Tags and summaries](/usable/core-concepts/tags-and-summaries) explains two important retrieval signals.
- [Collections](/usable/core-concepts/collections) provide curated search scopes.
- [Frontmatter and metadata](/usable/core-concepts/frontmatter-and-metadata) covers exact structured fields.
- [Memory fragments](/usable/core-concepts/memory-fragments) explains the full sources returned by retrieval.