Create empty typed JSON object?

[mudskipper]

Owing to the constraints of the BPM framework, this can only be done on the client side. So I need to effectively keep a client side copy of the DataTable.

Is this really the case? Can't you use callbacks or similar to save a server side data structure in a session variable?

[doodab]

Can you have a separate data structure with a single row of nulls you use as a template?

[NickFitz]

Why does it matter?

Because the things such as constraints aren't anything to do with JSON: they're added on by the platform you're using. JSON itself is so lightweight that the entire specification fits into the sidebar of this page: JSON