Comments
Current there is no creation dateTime element which results in resources which use this such as Contract, Media, SupportingDocumentation having to add a paired optional elemet to contain this information. Not all file format incorporate creation dateTime nor is it efficient to re-parse the creation dateTime from the file data every time it is required. We should add the element directly into the datatype itself. (There is an existing tracker - this serves to reinforce and expand on that).

Grahame's Comments
See tracker #3478