Two questions on JSON-LD Framing

Dear Sir/Madam:
I am studying JSON-LD and JSON Framing, and I want to use them in a small
program. But there are still some questions confusing me:
1.JSON Framing is a specification for JSON-LD, like JSON Schema for JSON.
But for the different between two files, is there a new extension name for
JSON Framing? Or just like JSON using .json only?
2.Our standard didn’t claim the title is needed in a JSON Framing document,
that means title is a optional parameter, not necessary as JSON Schema?
I wonder if you could give me some advises on build JSON Framing document.
I would be most grateful if you could reply at your earliest convenience.
Looking forward to hearing from you. Thank you very much.
                                    Sincerely yours
                                     Humphrey Zhao