---
title: "What are XMP annotations | Nutrient .NET SDK"
canonical_url: "https://www.nutrient.io/guides/dotnet/annotations/introduction-to-annotations/what-are-annotations-xmp/"
md_url: "https://www.nutrient.io/guides/dotnet/annotations/introduction-to-annotations/what-are-annotations-xmp.md"
last_updated: "2026-05-21T17:12:02.199Z"
description: "Explore the differences between PDF and XMP annotations. Learn how to effectively use annotations for improved document management and metadata handling."
---

# What are XMP annotations?

### PDF

[PDF](https://www.nutrient.io/guides/dotnet/annotations/introduction-to-annotations/what-are-annotations-pdf.md)

### XMP

[XMP](https://www.nutrient.io/guides/dotnet/annotations/introduction-to-annotations/what-are-annotations-xmp.md)

XMP annotations are XML-based objects specifically designed in Nutrient SDKs to enrich and enhance the PDF annotation functionality.

Apart from the standard [PDF annotation functionality](https://www.nutrient.io/guides/dotnet/annotations/introduction-to-annotations/what-are-annotations-pdf.md), our dedicated [`AnnotationManager` class](https://www.nutrient.io/api/gdpicture/GdPicture.NET.14.API~GdPicture14.AnnotationManager.html) enables you to add annotations not only to PDF documents, but also to images and TIFF files. The XMP annotations can also be saved to a separate XML file that’s independent from the source file. This makes it possible to apply different annotations to multiple files.

For a detailed description of how to use XMP annotations, refer to the [XMP annotations](/guides/dotnet/annotations/xmp-annotations.md) guide.
---

## Related pages

- [Understanding PDF and XMP annotations for collaboration](/guides/dotnet/annotations/introduction-to-annotations/what-are-annotations-pdf.md)
- [Understanding bounding boxes in PDF annotations](/guides/dotnet/annotations/introduction-to-annotations/bounding-boxes.md)
- [Understanding common types of PDF annotations](/guides/dotnet/annotations/introduction-to-annotations/annotation-types.md)