This space is a storage area for various elements that are used in different resource spaces. It is not designed to be browsed.
The need for this space was raised by having to work with the limitation of the "excerpt" / "excerpt include" macros; the later has the ability to reach for only one excerpt in a given page. This meant that for the 3Delight Material doc page, I had to split the page in several pages in order to be able to present common tables for both 3dfk and 3dfm, interlaced with each software's UI snapshots. Putting these pages here instead of in either the 3dfm or 3dfk space is more appropriate, and prevents over-detailled page trees.