Model-level validation vs field-level validation in grid custom popup edit template

[Remco]

I would like to add model-level validation. So far I can only see kendo-ui supports field-level validation. I want model-level validation (or class-level or entity-level whatever you call it) as the validation rule does not apply to an individual field / property but applies to the entire model. As a consequence, when invalid, the validation message cannot be associated with the input control for an individual field. It must be placed in a validation-summary in a location of my choice. All of this is to happen in a custom popup edit template of a grid. Validation is to be triggered by the Update button on the custom edit popup. Is this possible at all?