Must a service have a unique targetnamespace?

I'am wondering if two Web Services can have the same targetnamespace. Or is it discouraged to use the same tns multiple t开发者_如何学Pythonimes and what is the reason for this limitation?

Technically you can have both the webservices have the same target namespace. But namespaces package logically related set of items together. I wonder why you would like to use the same namespace.