[widgets-digsig] Updated 5.1 with revised Reference constraint text

I have updated the Widgets Signature editors draft, section 5.1 (use  
of xml signature) with revised text for Reference constraints. This is  
revised from what I proposed on list earlier as I tried to make the  
two cases clear (and disallow other random external references):

I replaced:

Every ds:Reference used within a widget signature MUST have a URI  
attribute. Every ds:Reference to an item within the widget signature  
MUST use an IDREF value for the ds:Reference URI attribute, referring  
to a unique ID within the widget signature [XML-Schema-Datatypes].  
Every ds:Reference to a widget file MUST use a relative URI expressing  
the path from the root of the widget resource to the referenced widget  
file [URI].

with
Every ds:Reference used within a widget signature MUST have a URI  
attribute.

Every ds:Reference MUST be one of the following two kinds of reference:

Reference to content within the same ds:Signature element
Every ds:Reference to an item within the widget signature MUST use an  
IDREF value for theds:Reference URI attribute, referring to a unique  
ID within the widget signature [XML-Schema-Datatypes].

Reference to a widget file in the same widget resource
The URI attribute of every ds:Reference to a widget file MUST be a URL- 
encoded [URI] zip relative path that identifies a file inside the  
widget package. A zip relative path MUST conform to the [ABNF] for zip- 
rel-path as specified in [Widgets Packaging].


Please let me know any additional comment or corrections. Thanks  
Marcos for suggestions to this wording.

(Also removed Inc from Nokia in title page)

regards, Frederick

Frederick Hirsch
Nokia

[1] http://dev.w3.org/2006/waf/widgets-digsig/