A dynamic integration framework allows property data to be dynamically influenced by external data sources. In one example, a client services component receives, from a client application, a request to create or edit an object. The client services component retrieves, from a content repository, an initial property set applicable to the object. An external data service specifies an initial property modification set based on property dependencies between controlling property values and dependent properties. The external data service provides the property modifications to the client services component with an initial data identifier that indicates a state of the property modifications. The client services component merges the initial property modifications and the initial data identifier with the initial property set.