MP3inside the ID3 block as a "PRIV" frame with an owner identifier of "XMP". MP4top-level "UUID" box with the UUID 0xBE7ACFCB97A942E89C71999491E3AFAC (Same as JPEG 2000) MOV (QuickTime)"XMP_" atom within a "udta" atom, within a top level "moov" atom. PDFembedded in a metadata stream contained in a PDF object WebPinside the files XMP chunk For file formats that have no support for embedded XMP data, this data can be stored in external .xmp sidecar files. Support and acceptance XMP Toolkit The XMP Toolkit implements metadata handling in two libraries: XMPCore for creation and manipulation of metadata that follows the XMP Data Model. XMPFiles for embedding serialized metadata in files, and for retrieving embedded metadata. Adobe provides the XMP Toolkit free of charge under a BSD license. The Toolkit includes specification and usage documents (PDFs), API documentation (doxygen/javadoc), C++ source code (XMPCore and XMPFiles) and Java source code (currently only XMPCore). XMPFiles is currently available as a C++/Java implementation in Windows, Mac OS, Unix/Linux. Free software and open-source tools (read/write support) Alfresco - open source CMS, DAM component can read/write XMP (Microsoft Windows, Linux) CC PDF Converter - A free open source (GPL) program to convert documents to PDF with embedded Creative-Commons license (Microsoft Windows). darktable - RAW developer, can read/write XMP in supported file formats (Linux, Mac OS X, Microsoft Windows, BSD) digiKam - open source (GPL) image tagger and organiser (Linux, Mac OS X, Microsoft Windows) ExifTool by Phil Harvey, open source Perl module or command line. Can read/write XMP, supports custom XMP schema (platform independent) F-Spot - Linux/GNOME photo manager and editor Geeqie - Lightweight Gtk+ based image manager (formerly GQView) GIMP - GNU Image Manipulation Program Gwenview - Linux/KDE photo manager and editor iText - Open Source Java library that can read and write XMP embedded in PDF files. Magic Lantern (firmware) - A firmware add-on for various Canon Digital single-lens reflex (DSLR) cameras, allowing writing of XMP sidecar files including exposure compensation information for post-deflicker. RawTherapee - Can read "rating" tags from embedded XMP, which are then shown in the File Browser/Filmstrip using RawTherapee’s star rating system. Shotwell - Linux/GNOME photo manager, can read/write Exif, IPTC and XMP metadata TYPO3 - open source Enterprise CMS. DAM component reads XMP (PHP based) Proprietary tools (read/write support) ACDSee Pro can read and write XMP information for DNG, GIF, JPEG, PNG and TIFF files (Microsoft Windows, Mac OS X). Acrobat