namespace Sources;

union SourceValue {
  NullSource,
  RuntimeSource,
  FileFragmentSource,
}

table Source {
    value:SourceValue (required);
}

table NullSource {
}

table RuntimeSource {
}

table FileFragmentSource {
  source_text:SourceText;
  start_character_index:uint;
  end_character_index:uint;
}

table SourceText {
  name:string (required);
  contents:string (required);
}