[1] Metadata Working Group (MWG) ( ()) <http://www.metadataworkinggroup.com/>
The Metadata Working Group (MWG) is a consortium of leading companies in the digital media industry, focused on the following goals:
Preservation and seamless interoperability of digital image metadata
Interoperability and availability to all applications, devices, and services
[2] Metadata Working Group: Specifications ( ()) <http://www.metadataworkinggroup.com/specs/>
[3] GUIDELINES FOR HANDLING IMAGE METADATA Version 2.0 November 2010 ( ()) <http://www.metadataworkinggroup.com/pdf/mwg_guidance.pdf>
[4] MWG 指針は、 Exif、IPTC-IIM、XMP の関係が規定されています。 例えば同種のメタデータが複数含まれる場合に、どれをどう解釈するべきかが述べられています。