Load different Jsons, Json editor, Save Json using ajax, label edges

[Suyog Dixit]

Hi. I am using Rgraph. Thanks for creating a wonderful app. I am sorry but please please help me with following three issues.

1) Actually I am creating a really big graph (really big (json file may be of 100+ MB)).

Hence I want to break json into parts category-wise.

I also want to load those jsons by AJAX. But as you can observe, user should not know that by clicking some specific nodes, a new json is loaded (In other words, new graph should appear to be connected with old one/parent one.) 

2) Can you suggest some good Json graph editor (WYSIWYG)? Searched a lot on Internet but found nothing useful.

3) How can Rgraph save can create and edite Json from front end (using php and ajax)?

4) I want to name edges (write on edges which shows relation), I searched on this group but you said yet it is not supported. Please give me some suggestion how to tweak Rgraph to perform this.