International Press Telecommunications Council - Wikipedia, the free encyclopedia

International Press Telecommunications Council - Wikipedia, the free encyclopedia: "In particular, the IPTC defined a set of metadata attributes that can be applied to images. These were defined originally in 1979, and revised significantly in 1991 to be the 'Information Interchange Model' (IIM), but the concept really advanced in 1994 when Adobe defined a specification for actually embedding the metadata into digital image files - known as 'IPTC headers.' IPTC Headers can be embedded into JPEG/Exif or TIFF formatted image files.

In 2001, Adobe introduced something called 'Extensible Metadata Platform' (XMP), which is an XML schema for the same types of metadata as IPTC, but is based on XML/RDF, and is therefore inherently extensible. The effort spawned a collaboration with the IPTC itself, eventually producing the 'IPTC Core Schema for XMP,' which merges the two approaches to embedded metadata. The XMP specification describes techniques for how to embed the metadata in JPEG, TIFF, JPEG2000, GIF, PNG, HTML, PostScript, PDF, SVG, Adobe Illustrator, and DNG files. Recent versions of all the main Adobe software products, (Photoshop, Illustrator, Acrobat, Framemaker, etc.) support XMP, as do an increasing number of third-party tools."