Databases typically aggregate the data from many individual contributors. What should the metrics measure? Impact of the database (solvable) or of specific contributions (unsolved IMHO). And the problem is almost recursive, there are databases aggregating data from other databases, etc.
Are there existing standards or methodologies for assessing research data value and reach? Is this the most interested topic in the workshop?
Are there any existing web usage tools or website that are already gathering usage for sites? What are the thoughts of understanding how they work and use their data?