In the Library the user gets different results based on how the sorting is done. First of all, the default size needs to be large to fill a 13″ display the same as the Open dialog in Author. It also needs to be organised by default to have Concepts in the leftmost column.
Here it is sorted by Title and you can see how in Concepts there might be more than one entry since the user may have assigned more than one Concept to the document:
Here the user has chosen to sort by Concepts and there will no longer be multiple Concepts per document but there may be multiple documents per Concept. How should we show that? Like this, with multiple document names in one row (minus icon maybe, or maybe leave it in for them?