Currently many, but not all, of the DSP apps provide a field to hold "documentation" such as a link to a specification. Customers who have Entota Cloud expect bi-directional links between a rule and each of the Enforcement Profiles in DSP. In the case of a Rule that is enforced by a validation in Conduct or Compose, the Page Event Validation registration doesn't have any such field. It would be easier and cleaner to add the field to the CranSoft PageEventValidation table than to customize that page on site with a link to a custom page for PageEventValidation_Ext.
External Reference field is included for both Business and Validation Rules on the vertical views of both for this purpose. This was introduced in 7.0.6