text: Item classes are used in Microsoft Dynamics GP to group items
  that share certain characteristics, for example electronics or
  women's clothing.
  Item classes together with the assigned items can be imported
  from Microsoft Dynamics GP to Sana to automatically build the main
  menu of the Sana webshop and catalog.
  In Microsoft Dynamics GP you can also assign attributes to the
  items and item classes. Attributes are item characteristics, like
  color, size, brand, style, etc. which can be shown on the product
  pages, used to filter, sort and search the products.
  For more information, see "Item
  Attributes".
  To manage item classes in Microsoft Dynamics GP click:
  Inventory > Setup >
  Item Class.
  Use the Item Class Setup window to create and
  manage item classes.
  Only item classes which are set as visible in webshop in
  Microsoft Dynamics GP can be imported to Sana. To manage visibility
  of item classes, select the necessary item class and at the top of
  the Item Class Setup window click:
  Additional > Sana Commerce.
  Use the Visible in Webshop checkbox to make an
  item class visible or invisible in the Sana webshop.
  If you make the item class invisible, items assigned to the item
  class will be still visible. Only the item class becomes invisible
  in the Sana webshop.
  In Microsoft Dynamics GP it is possible to create item classes
  of a single level. This means that you cannot create item classes
  with sub-classes. However, when item classes are imported to Sana
  and the main menu of the Sana webshop is created, you can manage
  webshop navigation in Sana Admin the way you need. For more
  information, see "Navigation".
  In the Item Maintenance window use the
  Class ID field to assign the item to the
  appropriate item class.
  When the catalog is ready in Microsoft Dynamics GP and items are
  assigned to the appropriate item classes, you can import them to
  Sana to automatically build webshop navigation and catalog. To
  import item classes from Microsoft Dynamics GP to Sana, open Sana
  Admin and click: Setup > ERP
  integration > Item categories.
  For more information about how to import item classes from
  Microsoft Dynamics GP to Sana, see "Item
  categories".