__call__ (
        ctx,
        ob,
        namespace,
        name,
        qname,
        default=NOT_GIVEN,
        )

Return a new context relative to ctx for namespace and name

qname is the original URL path component that was being traversed. ctx is an ITraversalContext, and ob is the target object (which may not be the same as ctx.current, if the handler is being reused as part of another handler). namespace is the namespace identifier of qname, and name is the remainder of qname.

The handler must return an appropriate new ITraversalContext, or raise an appropriate error. If a default other than NOT_GIVEN is supplied, the handler should return the default instead of raising NotFound when the target cannot be located. Note: the handler must not wrap default in a traversal context: checking for the returned default is the caller's responsibility.