To exclude a product category from a group of products:
Note: in order exclusion to be effective, excluded category must be part of an included category. In our example, 68 is part of 6. As a result our group will include all categories belonging to section 6 apart from division 68. This is the same as including divisions 60 to 67 and 69.
Next: Adding or excluding a range of product categories
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The World Bank, 2010