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

# Using AI features

> Learn how to use AI-powered APIs to search, summarize, and ask questions about documents in CDF.

Learn how to use AI-powered APIs to search, summarize, and ask questions about documents in CDF.

<CardGroup cols={2}>
  <Card title="Semantic search" icon="magnifying-glass" href="/dev/guides/ai/semantic_search">
    Find texts with similar semantic meaning in PDF documents using vector embeddings.
  </Card>

  <Card title="Document question answering" icon="message-question" href="/dev/guides/ai/document_qa">
    Ask natural-language questions about PDF documents and get AI-generated answers.
  </Card>

  <Card title="Document summary" icon="file-lines" href="/dev/guides/ai/document_summarization">
    Generate AI-powered summaries for one or more PDF documents.
  </Card>
</CardGroup>