Selecting products from Product Selection Tree
Using selection by Product Tree, you can pick product categories at various levels of details.
To make a selection by product tree use the Product tree selection box.
Product categories are generally structured like a tree, total trade (all products) being always the most aggregated category with several levels of sub-categories attached to it.
A + icon in front of a product category indicates it contains sub-categories. Click on the category name to expand the branch and display the subcategories:
Note than when a category is expanded, its + icon is changed into an - icon. You can close an expanded branch by double-clicking on the parent category.
Once the end of the structure (the leaf) is reached, there is no more subcategory and the leaf category is identified by the absence of a + or - icon. You can move the product by clicking on the > button. You can select as many products at any level of aggregtion as desired.
Next: Selecting products by cluster
WITS Online Help
The World Bank, 2010