Designer's current Extension Model framework is limiting the ability to be more flexible when modeling and translating metadata through the VDB at runtime and to inject DB-specific metadata (translator) during JDBC Import.

There are also drawbacks from having separate extension models (i.e. The Salesforce Import use-case)

TEIIDDES-905 is providing a new extension model framework that eliminates the need for a separate model.

1) Add "Edit Extended Properties" action and dialog/editor
2) Create a CND (Compact Node Definition) file/string to embed in the model (non-editable)
3) Decorate the model and it's "extended objects" (i.e. tables and columns) to indicate they are "extended"