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Re:Show HN: Make an app by adding JSON to this app by mitchtbaum on Saturday November 05, 2016 @01:27PM (#12880765)
>> how it works

> it instantiates .. components on demand

In general, to wrap your information engine around how information engines wrap around components, check out this marvelous design pattern: https://en.wikipedia.org/wiki/Visitor_pattern , like here https://github.com/Jasonette/JASONETTE-iOS/blob/develop/app/...

Re:Show HN: Make an app by adding JSON to this app by saganus on Saturday November 05, 2016 @02:57PM (#12881289)
Aha! thanks to both of you for the answer.

I've read about the Visitor pattern before, but did not link it to an engine like this.