Having developed Node and Edge/ Dynamic connector masters shapes for creating Node and Edge table entries for a SQL Server 2017, I decided that I should write some validation rules. The validation feature has been in Visio since the 2010 edition, but is underused, even though I wrote a book about them … see Microsoft Visio 2013 Business Process Diagramming and Validation . I think that only six rules are necessary to validate that a page with Node and Edge shapes is well constructed before attempting to update the tables in SQL Server, or any other GraphDatabase.