The property namespace is disabled, attempting to declare a type or other property specific characteristics for this property is not possible.
The attribute Web is for primary links to web sites that are described here on MyWikiBiz.
If you are interested in seeing "other links" for secondary site references, there is Attribute:Outbound Link (although this is a seldom-used attribute).
<ASK Mainlabel="Location" Header="show" Link="all"> + Web </ASK>