Yes that helps.
For others future ref here is a solution for using javascript to interate over DMN inputs that are arrays:
inputArray.elements().stream().anyMatch(function(e){
return java.util.stream.Stream.of("value1","value2").anyMatch(function(x){
return x == e.value()
})
})
where inputArray is array/collection you are passing into the DMN’s input, and the value1, value2, etc is the list of values you are validating against.