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   Help with Namespace Defaulting

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  • From: Mark Tucker <mct@foyt.indyrad.iupui.edu>
  • To: xml-dev@ic.ac.uk
  • Date: Mon, 31 Aug 1998 11:06:18 -0500 (EST)



Hello, 
	Can I define xmlns = "....." as a fixed attribute of an
element?

Suppose I have Person_Data (PD) and Book (BK), both of which would
like to use an element called NAME.  To keep the XML Elements unique,
I could use namespaces to keep PD:NAME distinct from BK:NAME.


MY QUESTION: 

	Can I use NAMESPACE defaulting via a fixed xmlns attribute
(as seen in the second example) to get rid of most of my namespace
prefixes?

=======================: With Namespaces :======================
<HTML xmlns:PD="http://tucker.rg.iupui.edu/Person_Data"
      xmlns:PN="http://tucker.rg.iupui.edu/Person_Name"
      xmlns:BK="http://tucker.rg.iupui.edu/Book">

<!ELEMENT PD:PERSON_DATA ( PD:NAME PD:AGE )/>
<!ELEMENT PD:NAME (PN:FIRST PN:LAST) />
<!ELEMENT PN:FIRST (#pcdata) />
<!ELEMENT PN:LAST (#pcdata) />
<!ELEMENT PD:AGE (#pcdata) />

<!ELEMENT BK:BOOK -- (BK:NAME BK:SUMMARY)/>
<!ELEMENT BK:NAME - - (#PCDATA) />
<!ELEMENT BK:SUMMARY - - (#PCDATA) />


<!ELEMENT OUTER (PD:NAME BK:BOOK> />


<OUTER>
  <PD:PERSON_DATA>
      <PD:NAME>
          <PN:FIRST>John</PN:FIRST>
          <PN:LAST>Doe</PN:LAST>
      </PD:NAME>	
    <PD:AGE>50</PD:AGE>
  </PD:PERSON_DATA>
  
  <BK:BOOK>
      <BK:NAME>Xml Made Easy</BK:NAME>
      <BK:SUMMARY>Now its all clear</BK:SUMMARY>
  </BK:BOOK>    
</OUTER>

</HTML>


========================: With Namespace Defaulting :====================



<HTML xmlns:PD="http://tucker.rg.iupui.edu/Person_Data"
      xmlns:PN="http://tucker.rg.iupui.edu/Person_Name"
      xmlns:BK="http://tucker.rg.iupui.edu/Book">

<!ELEMENT PD:PERSON_DATA ( PD:NAME PD:AGE )/>
<!ATTRLIST PD:PERSON_DATA 
	xmlns "http://tucker.rg.iupui.edu/Person_Data" #FIXED /?

<!ELEMENT PD:NAME (#pcdata) />

<!ATTRLIST PD:NAME
	xmlns "http://tucker.rg.iupui.edu/Person_Name" #FIXED /?

<!ELEMENT PN:FIRST (#pcdata) />
<!ELEMENT PN:LAST (#pcdata) />
<!ELEMENT PD:AGE (#pcdata) />

<!ELEMENT BK:BOOK -- (BK:NAME BK:SUMMARY)/>
<!ELEMENT BK:NAME - - (#PCDATA) />
<!ELEMENT BK:SUMMARY - - (#PCDATA) />
<!ATTRLIST BK:BOOK
	xmlns "http://tucker.rg.iupui.edu/Book" #FIXED /?


<!ELEMENT OUTER (PD:PERSON_DATA BK:BOOK> />

<OUTER>
  <PD:PERSON_DATA>
      <NAME>
          <FIRST>John</FIRST>
          <LAST>Doe</LAST>
      </NAME>	
    <AGE>50</AGE>
  </PD:PERSON_DATA>
  
  <BK:BOOK>
      <NAME>Xml Made Easy</NAME>
      <SUMMARY>Now its all clear</SUMMARY>
  </BK:BOOK>    
</OUTER>

</HTML>



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