## Documentation Index

Fetch the complete documentation index at: [/llms.txt](https://docs.cognigy.com/llms.txt)

Use this file to discover all available pages before exploring further.

## Prerequisites

- For the Search only mode, you need access to an embedding model that [supports Knowledge Search](https://docs.cognigy.com/ai/agents/develop/gen-ai-and-llms/model-support-by-feature).
- For the Search & Extract & Output and Search & Extract modes, you need access to both an embedding model and a generative AI model to support [Knowledge Search and Answer Extraction](https://docs.cognigy.com/ai/agents/develop/gen-ai-and-llms/model-support-by-feature).

## Modes

The Search Extract Output Node has the following modes:

- **Search & Extract & Output** — With this mode, the AI Agent searches Knowledge Sources, extracts answers, and outputs the results automatically as text or adaptive card.
- **Search & Extract** — With this mode, the AI Agent searches Knowledge Sources and extracts answers. You have the flexibility to use these answers in other Nodes or Extension Nodes.
- **Search only** — With this mode, the AI Agent searches Knowledge Sources. You have the flexibility to use the information found.

For more detailed information about the Search Extract Output Node, read the [Node reference](https://docs.cognigy.com/ai/agents/develop/node-reference/other-nodes/search-extract-output).