Added alternative flag to Signal element in TDFs

build/scripts/Targets/TargetDescriptionFiles/Signal.php

@@ -5,6 +5,7 @@ class Signal
 {
     public ?string $name = null;
     public ?string $padKey = null;
+    public ?bool $alternative = null;
     public ?int $index = null;
     public ?string $function = null;
     public ?string $field = null;
@@ -12,12 +13,14 @@ class Signal
     public function __construct(
         ?string $name,
         ?string $padKey,
+        ?bool $alternative,
         ?int $index,
         ?string $function,
         ?string $field
     ) {
         $this->name = $name;
         $this->padKey = $padKey;
+        $this->alternative = $alternative;
         $this->index = $index;
         $this->function = $function;
         $this->field = $field;