Strange difference between mixed and interleave

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Hi,

I always thought that <mixed> X </mixed> is just shorthand for
<interleave> X <text/> </interleave>. But given document

<p>
     text
     <b>fddfdf</b>
     ddfdf
     <i>dfdfdf</i>
     dfdf
     <b>ddf</b>
     <i>dfdfdf</i>
</p>

it can be validated with schema that uses interleave:

grammar xmlns=3D"http://relaxng.org/ns/structure/1.0">
     <start>
       <element name=3D"p">
         <interleave>
           <zeroOrMore>
             <element name=3D"b">
               <text/>
             </element>
           </zeroOrMore>
           <zeroOrMore>
             <element name=3D"i">
               <text/>
             </element>
           </zeroOrMore>
           <text/>
         </interleave>
       </element>
     </start>
</grammar>

but when I use mixed it doesn't validate

<grammar xmlns=3D"http://relaxng.org/ns/structure/1.0">
     <start>
       <element name=3D"p">
         <mixed>
           <zeroOrMore>
             <element name=3D"b">
               <text/>
             </element>
           </zeroOrMore>
           <zeroOrMore>
             <element name=3D"i">
               <text/>
             </element>
           </zeroOrMore>
         </mixed>
       </element>
     </start>
</grammar>

What I am missing?

				Jirka

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     Jirka Kosek     e-mail: [email protected]     http://www.kosek.cz
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