collective.behavior.sku provides behavior add SKU field to dexterity content types.

• Plone-4.3.2 with Python-2.7.x [taito]

The behavior can be added through the web or directly through the file system to the dexterity content type xml file like:

<property name="behaviors">
  ...
  <element value="collective.behavior.sku.interfaces.ISKU" />
  ...
</property>