# XMP Namespaces and Prefixes Discover the public namespaces and prefixes that exist in XMP metadata tags. ## Topics ### Public Namespaces [`kCGImageMetadataNamespaceDublinCore`](/documentation/ImageIO/kCGImageMetadataNamespaceDublinCore) The namespace for the Dublin Core Metadata Element Set. [`kCGImageMetadataNamespaceExif`](/documentation/ImageIO/kCGImageMetadataNamespaceExif) The namespace for the Exchangeable Image File (EXIF) format. [`kCGImageMetadataNamespaceExifAux`](/documentation/ImageIO/kCGImageMetadataNamespaceExifAux) The namespace for EXIF auxiliary keys. [`kCGImageMetadataNamespaceExifEX`](/documentation/ImageIO/kCGImageMetadataNamespaceExifEX) The namespace for the exifEX format. [`kCGImageMetadataNamespaceIPTCCore`](/documentation/ImageIO/kCGImageMetadataNamespaceIPTCCore) The namespace for the IPTC format. [`kCGImageMetadataNamespacePhotoshop`](/documentation/ImageIO/kCGImageMetadataNamespacePhotoshop) The namespace for Photoshop image metadata. [`kCGImageMetadataNamespaceTIFF`](/documentation/ImageIO/kCGImageMetadataNamespaceTIFF) The namespace for TIFF image metadata. [`kCGImageMetadataNamespaceXMPBasic`](/documentation/ImageIO/kCGImageMetadataNamespaceXMPBasic) The namespace for the Extensible Metadata Platform (XMP) format. [`kCGImageMetadataNamespaceXMPRights`](/documentation/ImageIO/kCGImageMetadataNamespaceXMPRights) The namespace for XMP metadata that conveys legal restrictions associated with a resource. ### Public Prefixes [`kCGImageMetadataPrefixDublinCore`](/documentation/ImageIO/kCGImageMetadataPrefixDublinCore) The prefix string for tags in the Dublin Core Metadata Element Set. [`kCGImageMetadataPrefixExif`](/documentation/ImageIO/kCGImageMetadataPrefixExif) The prefix string for tags in the Exchangeable Image File (EXIF) metadata. [`kCGImageMetadataPrefixExifAux`](/documentation/ImageIO/kCGImageMetadataPrefixExifAux) The prefix string for tags in the EXIF auxiliary metadata collection. [`kCGImageMetadataPrefixExifEX`](/documentation/ImageIO/kCGImageMetadataPrefixExifEX) The prefix string for tags in the exifEX metadata. [`kCGImageMetadataPrefixIPTCCore`](/documentation/ImageIO/kCGImageMetadataPrefixIPTCCore) The prefix string for tags in the IPTC metadata. [`kCGImageMetadataPrefixPhotoshop`](/documentation/ImageIO/kCGImageMetadataPrefixPhotoshop) The prefix string for tags in the Photoshop image metadata. [`kCGImageMetadataPrefixTIFF`](/documentation/ImageIO/kCGImageMetadataPrefixTIFF) The prefix string for tags in the TIFF image metadata. [`kCGImageMetadataPrefixXMPBasic`](/documentation/ImageIO/kCGImageMetadataPrefixXMPBasic) The prefix string for tags in the XMP metadata. [`kCGImageMetadataPrefixXMPRights`](/documentation/ImageIO/kCGImageMetadataPrefixXMPRights) The prefix string for tags in the XMP metadata that convey legal restrictions for the resource. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)