SMS2: ID for JSON Lists

Support
1

I am converting the following JSON structure succesfully via a SMS2 mapper:

...

FROM JSON{

 {
  [
     {"utterance": "?utt"}, 
  ]
 }

}TO {
?hit has :Utterance.
?utterance a :Utterance .
       :has_text ?utt .
...
}

Example input and output:

{
  [
     {"utterance": "Hello "}, 
     {"utterance": "world"}, 
  ]
 }

<:Message123> :has <:Utterance1> ;
                           :has <:Utterance2> .
<:Utterance1> :has_text "Hello" .
<:Utterance2> :has_text "World" .

Is there a way to keep track of the order of the array using SMS2? The result should be something like:

<:Message123> :has <:Utterance1> ;
                           :has <:Utterance2> .
<:Utterance1> :has_text "Hello" ;
                        :has_id 1 .
<:Utterance2> :has_text "World" ;
                        :has_id 2 .

So how could I add an iterator to:

?hit has :Utterance.
?utterance a :Utterance .
       :has_text ?utt ; 
       :has_id <????my_iterator_solution????>

...
3

There is currently no facility to preserve order of elements in an array. You could do a transformation using the jq utility as follows. I've added a key to correspond to your array:

{
    "values":[
     {"utterance": "Hello "},
     {"utterance": "world"}
  ]
}

You can transform it like so:

$ cat utterances.json | jq '.values | to_entries | map({value:.value, index:.key})'
[                                                                                                                                      
  {                                                                                                                                    
    "value": {                                                                                                                         
      "utterance": "Hello "                                                                                                            
    },                                                                                                                                 
    "index": 0                                                                                                                         
  },                                                                                                                                   
  {                                                                                                                                    
    "value": {                                                                                                                         
      "utterance": "world"                                                                                                             
    },                                                                                                                                 
    "index": 1                                                                                                                         
  }                                                                                                                                    
]

Jess