McDBAttributeTypes collection objects are sets of descriptions for Attribute instances within a particular McDBDatabase instance. McDBAttributeTypes collections are associated with a parent McDBType (McDBNode.Type description) object, and contain information about the [suggested] attributes for the McDBType. For example, a McDBType of “Experiment” may have an McDBType.Attributes collection containing an McDBAttributeType named “Experiment Name” nad "Date of Experiment". There will then be two McDBAttributeType instances, one with each Name and Type, describing these suggested attributes. Both of the McDBAttributeType objects would then be placed into a McDBAttributeTypes collection representing the Attributes property of the “Experiment” McDBType.