******
Design
******

The *Sale Product Quantity Module* extends the following concepts.

.. _concept-product:

Product
=======

When the *Sale Product Quantity Module* is activated, products gain some extra properties.
These include a minimal and rounding quantity which are enforced on the `Sale
<sale:model-sale.sale>` lines.

.. seealso::

   The `Product <product:concept-product>` concept is introduced by the
   :doc:`Product Module <product:index>`.
