Fetch list of text from given text

Use Index function -> index() Function - Appian 24.3

Yes that was my first try, I used Index(local!variable,"id",null)
**Local!variable to store output
But there is no match for Id

You have to index with the Reference type of ASQ Reference Data type 

If record type

asq reference data. field.id 

or if its cdt

asq reference data.id

simple - for plain dictionary or CDT data, as tejas mentioned, 2 options:
1) just reference the properties with dot-property, i.e. "local!myData.value",
2) use property() function, i.e. property(local!myData, "value", {}).  (note: index() does the same thing, but i insist on property() for getting properties for code readability)

more deluxe: iterate over the values and return whatever property you want (helpfully you can use this to do looped transformations easily if you want):

a!forEach(
  local!myData,
  upper(fv!item.value)  /* wrapping in "upper()" here just as a simple example of doing a row-by-row transform inside a!forEach() loop */
)

If the data type is RecordType data, you can use similar to the above approaches, but instead of naming the property desired as plaintext, you'll need to pass a recordType reference to the field you want, i.e. "recordType!ASQ Reference Data.fields.value" (this would render as the actual field reference itself for you in Appian when done correctly), and this can be done for direct accessing the properties and also used in the property() function.