Supporting modification of properties via a computer system's user interface

A set of object classes provide a framework supporting user modification of user interface properties. The classes include a properties class which is a template for creation of property objects encapsulating property values and the view attributes (GUI information) required for creating views of the property via a user interface. Property objects provide a single mechanism for representing a particular property, allowing a number of different views to be open on the same property. User interactions with different views of a property via the user interface result in messages being sent to the same property object. If a property value is changed, then the chance is propagated back to all associated applications having views for the object and so view concurrency is automatically achieved.