<form method="GET" name="newContact" action="contact">
   <fieldset>
   <legend>Create New Contact</legend>
   <input name="@template" type="hidden" value="item"/>
   <input name="@action" type="hidden" value="new"/>
   <input tal:attributes="name
string:@add@station${context/id}@contacts" type="hidden"
value="contact-1"/>
   <input name="@type" type="hidden" value="2"/>
   <input name="@required" type="hidden" value="name"/>
   <strong>Name: </strong><input name="name"/>
   <input type="submit" name="submit" value="Create"/>
   </fieldset>
</form>

The @add@station bit in the above form should add the
id of the created contact to the station's contacts
multilink, but it doesn't.