You are able to set the correct data type in OpenAccess either by hand or by choosing a type from the property grid. There you have a drop-down where you have only correct data types to choose from. The user does have the freedom to type his own data type such as "fcsdnf", but that could also be the name of an enum that the user has created. We are allowing the user to enter his own values for the data types exactly for the reason where a user has defined his own enum or other data type.
the Telerik team
Register for the Q2 2011 What's New Webinar Week. Mark your calendar for the week starting July 18th and book your seat for a walk through of all the exciting stuff we will ship with the new release!