> For the complete documentation index, see [llms.txt](https://docs.graphlit.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.graphlit.dev/api-guides/use-cases/content.md).

# Content Foundations

Understanding Graphlit's content model, tri-store architecture, and search capabilities.

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## Core Concepts

**Start Here**:

* [Content Type vs File Type](/api-guides/use-cases/content/content-type-vs-file-type-explained.md) - Understanding the hierarchy
* [Content Metadata Structure](/api-guides/use-cases/content/content-metadata-structure.md) - Auto-captured metadata by type
* [Content Lifecycle States](/api-guides/use-cases/content/content-lifecycle-states.md) - Created, Enabled, Disabled, Archived

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## Search & Retrieval

### Search Types

* [Vector Search Explained](/api-guides/use-cases/content/content-search-vector-explained.md) - Semantic similarity
* [Keyword Search Explained](/api-guides/use-cases/content/content-search-keyword-explained.md) - Full-text + BM25
* [Hybrid Search Deep Dive](/api-guides/use-cases/content/content-search-hybrid-deep-dive.md) - RRF algorithm (recommended)

### Query Patterns

* [Advanced Search with Filters](/api-guides/use-cases/content/content-search-with-filters.md) - Complex multi-criteria queries
* [Metadata Filtering Strategies](/api-guides/use-cases/content/content-metadata-filtering-strategies.md) - Entity + date + type filters
* [Query Performance Patterns](/api-guides/use-cases/content/content-query-performance-patterns.md) - Pagination, caching, optimization

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## Type-Specific Metadata

* [Email Metadata Queries](/api-guides/use-cases/content/content-email-metadata-queries.md) - From/to, labels, threads
* [Message Metadata Queries](/api-guides/use-cases/content/content-message-metadata-queries.md) - Slack/Teams channels, mentions
* [Document Metadata Queries](/api-guides/use-cases/content/content-document-metadata-queries.md) - Page counts, authors, encryption

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## CRUD Operations

### Ingestion

* [Ingest URI (Basic)](/api-guides/use-cases/content/content-ingest-uri-basic.md) - Simple URL ingestion
* [Ingest URI with Workflow](/api-guides/use-cases/content/content-ingest-uri-with-workflow.md) - With entity extraction
* [Ingest Text](/api-guides/use-cases/content/content-ingest-text.md) - Plain text/markdown
* [Ingest Event](/api-guides/use-cases/content/content-ingest-event.md) - Calendar events
* [Ingest Encoded File](/api-guides/use-cases/content/content-ingest-encoded-file.md) - Base64 uploads

### Querying

* [Query with Filters](/api-guides/use-cases/content/content-query-with-filters.md) - Advanced filtering
* [Query Similar Content](/api-guides/use-cases/content/content-query-similar.md) - Find similar documents
* [Is Done Polling](/api-guides/use-cases/content/content-is-done-polling.md) - Check processing status

### Management

* [Get Content Details](/api-guides/use-cases/content/content-get.md) - Full content retrieval
* [Update Metadata](/api-guides/use-cases/content/content-update-metadata.md) - Modify properties
* [Delete Content](/api-guides/use-cases/content/content-delete.md) - Single deletion
* [Batch Delete](/api-guides/use-cases/content/content-batch-delete.md) - Bulk removal

### Publishing

* [Publish Summary](/api-guides/use-cases/content/content-publish-summary.md) - Generate summaries
* [Publish Audio](/api-guides/use-cases/content/content-publish-audio.md) - Text-to-speech

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## Related Tutorials

* [Quickstart: Your First Agent](/getting-started/quickstart.md) - Build a streaming agent in 7 minutes
* [Context Engineering](/tutorials/context-engineering.md) - Advanced retrieval patterns

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