Parse OO output parameter which is JSON-formatted string in SMAX rules

Hi,

I use SMAX 24.3.

OO flow returns an output field which is JSON-formatted string which I map to a String field in User Options.

Then I retrieve different keys from this 'complex' field and use in the the Business Rules in Task Plan etc.

I use the function extract_property(field_name, 'key_name') which is  the function dedicated for working with comments, but it seems to do its job..

My questions are:

1. Is it supported solution and I can use it safely ?

2. Is the any other not documented function which enables manipulation on JSON strings or another approach ?

3. Why this 'complex' field value is displayed in GUI General User Options Properties as [object Object] ? Perhaps I can manipulate on the object  ? I checked that using '.key'or "['key']" to retrieve key values does not work.

BR,

Dariusz