jsonpath as key accessor

is it possible use jsonpath as key accessor? somethings like this:

{
  "id" : $content.container[0].component[?(@.componentType==1)].id
}

[catull]

I prefer the first option.

Reasoning:

• The question mark is a good symbolic indicator of a boolean evaluation (“Is it true or false”)
• The second choice “ties” the question mark to component, kind of existential. ("Is there an attribute named component, yes or no ?)
• The third option is too generic, it denotes a calculation, similar to expressions in shell scripts. It just so happens to evaluate to a boolean. It could be used for a dynamic calculation, though.

However, I also like the curly braces I mentioned. But, out of consistency that indexing and evaluation happen to be in square brackets, I vote for your first option, hanving an expression that produces true/false coated in-between [? and ].

[larsga]

Well, I didn’t understand the initial question, and I still don’t, so I can’t really answer it. What “JSON path expressions” are being asked for that the language doesn’t have?