Check this out...

A lot of useful info can be found here:  

http://www.updig.org/  

From the updig.org website:  

The UPDIG guidelines aim to clarify issues affecting accurate reproduction and management of digital images. These guidelines were created to establish photographic standards and practices for photographers, designers, printers, and image distributors. The guidelines cover Digital Asset Management, Color Profiling, Metadata, and Photography Workflow.