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<bugzilla version="5.0.4"
          urlbase="https://www.w3.org/Bugs/Public/"
          
          maintainer="sysbot+bugzilla@w3.org"
>

    <bug>
          <bug_id>6190</bug_id>
          
          <creation_ts>2008-10-29 22:13:46 +0000</creation_ts>
          <short_desc>Multiple Attribute Wildcards</short_desc>
          <delta_ts>2008-10-29 22:14:07 +0000</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>XML Schema</product>
          <component>Structures: XSD Part 1</component>
          <version>1.0/1.1 both</version>
          <rep_platform>PC</rep_platform>
          <op_sys>Windows XP</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>WORKSFORME</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords></keywords>
          <priority>P2</priority>
          <bug_severity>normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="David Ezell">David_E3</reporter>
          <assigned_to name="C. M. Sperberg-McQueen">cmsmcq</assigned_to>
          
          
          <qa_contact name="XML Schema comments list">www-xml-schema-comments</qa_contact>

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>22284</commentid>
    <comment_count>0</comment_count>
    <who name="David Ezell">David_E3</who>
    <bug_when>2008-10-29 22:13:46 +0000</bug_when>
    <thetext>The WG explored an answer to the questions at the face to face meeting.

Michael Kay sent several emails outlining the issue:
http://lists.w3.org/Archives/Member/w3c-xml-schema-ig/2008Oct/0009.html
http://lists.w3.org/Archives/Member/w3c-xml-schema-ig/2008Oct/0014.html
http://lists.w3.org/Archives/Member/w3c-xml-schema-ig/2008Oct/0015.html

From the IRC log:
&lt;MSM&gt; The WG discussed this issue at some length during the ftf today.
&lt;MSM&gt; There was some sympathy for the premise of the issue report, that
&lt;MSM&gt; union is a more natural operation in the situations mentioned.
&lt;MSM&gt; Further examination persuaded us that (a) references to two different
&lt;MSM&gt; attribute groups with different wildcards uses intersection, extension
&lt;MSM&gt; uses union with the base, and (b) sometimes union is the natural
&lt;MSM&gt; operation, and sometimes intersection is the natural operation (see
&lt;MSM&gt; minutes of the meeting for examples with terse commentary).
&lt;MSM&gt; Eventually we lost confidence that making the change proposed here
&lt;MSM&gt; would actually produce more reliably useful results.  
&lt;MSM&gt; Since there is no logical contradiction here, but instead at most an
&lt;MSM&gt; unexpected feature of the design, we decided to close this as
&lt;MSM&gt; WORKSFORME before we remembered that no Bugzilla record has been
&lt;MSM&gt; opened for this question.  

We are creating this issue so that we can close it, but track it properly.</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>