The EF diagram now includes additional steps to accommodate data validation:

• Notations are made in the model classes that tailor each field for type, display, length, and regex patterns
• The model hints alter the database schema so the data has proper constraints
• The model hints are also used by the context to determine if any data changes are valid
• The model hints also interact with JavaScript validation scripts that display helpful information on the browser page when data is changed by the user
• The JavaScript validation scripts will restrict a <form> POST if the data does not match the model hints
• Once the requested changes are marked as valid, the context method SaveChangesAsync() passes the data to the database by way of SQL statements
• The database constraints created by the context via the model hints further restrict inserts, updates, and deletes using SQL referential techniques