XMP (Extensible Metadata Platform)
Definition
An Adobe-defined metadata format stored as an XML packet embedded in image files. XMP carries a software history field (xmpMM:History) that editing applications append to when they process a file. A populated XMP history block is direct structural evidence of post-capture software processing.
Related terms
- EXIF (Exchangeable Image File Format)
- A metadata standard embedded in JPEG and TIFF files by capture devices. EXIF fields record camera make and model, lens data, exposure...
- C2PA (Coalition for Content Provenance and Authenticity)
- An open technical standard that embeds cryptographically signed provenance assertions into media files at the point of capture or editing. A C2PA...
- Container atom / box
- The structural metadata units inside video container formats (MP4, MOV, MKV). Atoms such as mvhd (movie header) carry creation and modification timestamps;...
- File signature (magic bytes)
- The fixed byte sequence at the start of a file that identifies its format. JPEG files begin with FF D8 FF; PNG...
- IPTC IIM
- International Press Telecommunications Council Information Interchange Model: a legacy binary metadata standard embedded in JPEG APP13. Carries caption, credit, copyright, and editorial...
- JPEG quantisation table
- A matrix of 64 values embedded in a JPEG file that controls the precision with which each frequency component of the image...
- Makernote
- A proprietary EXIF sub-block written by the camera manufacturer to record device-specific data not covered by the EXIF standard. Canon, Nikon, Sony,...
- PNG chunk
- The basic structural unit of a PNG file. Each chunk has a four-character type code, a length field, a data payload, and...
- Thumbnail inconsistency
- Many cameras embed a reduced-resolution preview image inside the EXIF header of a JPEG. If the main image has been cropped or...
Explained in these topics
- EXIF and Container Metadata ForensicsAn Adobe-defined XML metadata format embedded in or sidecar to image and video files. Written primarily by editing software (Photoshop, Lightroom, Premiere), X...
- Image File Format and Integrity ChecksAn Adobe-defined metadata format stored as an XML packet embedded in image files. XMP carries a software history field (xmpMM:History) that editing application...