Once you have defined a category you could make a new one following the steps below. The steps are illustrated in Figure 1.


  1. A category is already defined. In the current example I use CAS RN 66-25-1, first three aquatic databases are selected and the category is defined using “USEPA New Chemical categories”. As seen on the figure below the category appears as a sublevel of “Document_X” node within “Category definition” section 
  2. Click on “Document_X” node(at the top of the tree) shown on the figure below
  3. The target chemical appears alone without category members in a new datamatrix.
  4. Now you could click on a newly desired category (for instance OFG) and then click Define.


 Figure 1 Example of defining new category