# Document Metadata

> Update PDF metadata in a WPF app: what a PDF stores, new keywords for an existing file, a JSON index of PDFs with ServerTextControl and a PDF/UA title check.

- **Product:** TX Text Control .NET for WPF
- **Section:** Documentation
- **Kind:** Topic
- **Path:** TX Text Control .NET for WPF > PDF Processing > Document Metadata
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/metadata/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/metadata/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/metadata/llms-full.txt

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## On This Page

- [Where Metadata Lives](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/metadata/#where-metadata-lives)
- [Update the Metadata of an Existing PDF](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/metadata/#update-the-metadata-of-an-existing-pdf)
- [Build a Keyword Index of PDF Files](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/metadata/#build-a-keyword-index-of-pdf-files)
- [Store Custom Properties](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/metadata/#store-custom-properties)
- [Give an Accessible PDF Its Title](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/metadata/#give-an-accessible-pdf-its-title)
- [Read the Raw Metadata of a PDF](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/metadata/#read-the-raw-metadata-of-a-pdf)
- [Next Steps](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/metadata/#next-steps)

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## Nearby

- **Previous:** [Text Extraction](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/text-extraction/llms.txt)
- **Next:** [Passwords and Access Permissions](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/pdf/passwords/llms.txt)