Category

book Part 1: Origin of Cosmic Universe

OCU - all Topics

The metadata 'ct-bk.pt01 OCU-All Topics' is the label for the sorting-category. This category contains all Topic titles that structurally belong to Part 1 'Origin of the Cosmic Universe' of the Book site.
OCU = Origin of Cosmic Universe.
The overarching Book-category contains several subcategories called Parts. 
In the details below, you may see a list of all member-pages that belong to the Part1-container which is a subcategory within the Book category.
You will also see that the Part-subcategory contains subcategories, called Topics. The number in the dark blue box (rounded corners) indicates the amount of reading pages (Article Count).