Issue 3703 - Clarify that element item always assertion in policy expression

Issue 3703 - <http://www.w3.org/Bugs/Public/show_bug.cgi?id=3703>

Description - Change sentence in 2.2 to clarify that element  
information item in policy expression must be treated as an assertion

Justification -

Section 2.2 of Framework states "If an Element Information item is not
recognized, it SHOULD be treated as an assertion."

This sentence is not necessary, but if kept should state MUST.

The document is clear that an XML element contained within a Policy  
Expression
is always an assertion (unless wsp:Policy, wsp:ExactlyOne, wsp:All)

Target - WS-Policy Framework [1]

Proposal:
Change SHOULD to MUST.

Test: doc review.

[1] http://dev.w3.org/cvsweb/~checkout~/2006/ws/policy/ws-policy- 
framework.html?content-type=text/html;%20charset=utf-8

regards, Frederick

Frederick Hirsch
Nokia