Since we know can know the datatype of the attributes, we can display as well as make forms for each attribute based on the datatype.  E.g., relationtype form has 'transitive', and its value type is boolean.  Therefore checkbox widget should appear.

Another example: If the value field of an attributetype is defined as varchar, then string widget should be made.  Since for node-specific properties we know the datatypes in advance, we can make static forms.  But for network properties of a node, after we know what attributes the node has, we need to first check the datatype, and then call the relevant widget for both display as well as editing purpose.