public review comment: public navigational params: how to removeand behavior for urls

[Stefan Hepper <sthepper@hursley.ibm.com>]

Hi,
I've the following questions in regard to public navigational parameters:

1. which public navigational parameters are supplied when the user 
clicks on a URL?
currently the spec states:
- 10.2.1.3: "The value of this portlet URL parameter defines updates to 
the publicValues portion of the Portlet's navigational state "
- 6.1.13: "The public portion of navigational state could be set by the 
Consumer even if not supplied by the Portlet."

Does that mean that the portlet will get the cross product of the 
updates defined in the URL and all other navigational state values that 
the portlet has defined as supported and for which the consumer has some 
values?
I.e. if the portlet does not get a public nav param, does this mean that 
this param was removed by some portlet?
Or is the behavior completely non-deterministic and you may or may not 
get some or all of the public nav params?

2. How can a portlet declare that a nav param should be removed?


Stefan