There miss some properties in ActivityEntry

[yingjieg]

Hi , I am trying to implement a function that can embed an app view within an activity stream, I need to insert the property below. but in ActivityEntry only have action, actor, object

"jive": {
"app": {
"appUUID": "a1b9197e-846d-5bec-a4b8-8c08325148af",
"view": "discuss",
"context": {
"":""
}
}
}

Is there a document to describe the activity schema ? I think I can complete this json definition myself. I searched lots of posts in community, but only have the schema for tile-list, tile-table, etc....