DM-08: Store metadata for later use

Executive Summary: 
A researcher needs to add metadata to a metadata collection so that it can be used later in search operations.
User Importance Summary: 
Researchers and scientists in most fields use metadata to describe their data in order to preserve and communicate their understanding of the data's history, meaning, and key features. Metadata can be vital when searching for data, when reusing data, and when reproducing scientific results.
Target Communities and Sizes: 
Researchers - 10,000 < N < 100,000