Metadata Working Group

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The Metadata Working Group (MWG) is a consortium in which several established software and hardware manufacturers in the digital media industry have come together to standardize the sometimes contradicting use of metadata in image files . The initiative was launched by Microsoft in 2006 , Adobe , Apple , Canon and Nokia joined in 2007, and Sony followed in 2008 .

The aim is not to replace existing standards such as the IPTC-IIM standard , Exif or XMP , but to secure their meaningful use through an overarching framework.

specification

On September 24, 2008, the MWG specification 1.0 was presented to the public at a press conference on the occasion of photokina in Cologne .

This new specification is intended to meet both professional and amateur requirements and determine how metadata is stored and exchanged and how it is to be handled. In this way, MWG enables manufacturers and users to achieve significantly better compatibility in the use of metadata.

example

MWG instruction to read Exif from TIFF

So far, in a digital image file, for example in JPG format, different information on the same issue can be stored simultaneously in the containers for Exif as well as for IPTC and XMP. It is undefined which information is valid.

For the example JPG file, the MWG specification clearly defines that the Exif information has priority over IPTC and XMP, provided that it is available here.

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