Re: [xsl] DTD to Scheme

Subject: Re: [xsl] DTD to Scheme
From: omprakash.v@xxxxxxxxxxxxx
Date: Wed, 2 Feb 2005 11:37:30 +0530
Hi,

 I believe the error you are getting is not a serious one. I too got the
same erro when I tried to validate my schema using XSV. The reason I found
out was that when the first 'waiting'  is encountered, the parser doesn't
know if it is the waiting belonging to the item having 1 waiting or the
item having '1 waiting and 1 passing'.

This is only a problem with certain parsers while other parsers that
implement some form of look-ahead should validate this document fine.

BTW, have you tried any DTD to schema converter tools to see what result
they gave.

Regards,
Omprakash.V





     <xsd:element name="item">
         <xsd:complexType>
             <xsd:sequence>
                 <xsd:element ref="risid"/>
                 <xsd:choice>
                     <xsd:element ref="waiting"/>
                     <xsd:element ref="passing"/>
                     <xsd:sequence>
                         <xsd:element ref="waiting"/>
                         <xsd:element ref="passing"/>
                     </xsd:sequence>
                 </xsd:choice>
             </xsd:sequence>
         </xsd:complexType>
     </xsd:element>



                                                                                                                   
                    Stano Paska                                                                                    
                    <paska@xxxxxx        To:     xsl-list@xxxxxxxxxxxxxxxxxxxxxx                                   
                    k>                   cc:     (bcc: omprakash.v/Polaris)                                        
                                         Subject:     [xsl] DTD to Scheme                                          
                    02/02/2005                                                                                     
                    10:53 AM                                                                                       
                    Please                                                                                         
                    respond to                                                                                     
                    xsl-list                                                                                       
                                                                                                                   
                                                                                                                   




Hi,

I need rewrite som DTD into XML Schema.
I have problem with one part.
In element "item" there may be three combinations of waiting/passing
elements:
one waiting, one passing, or both.

In DTD it is easy and it works:
<!ELEMENT item (risid,(waiting|passing|(waiting,passing)))>

In Scheme it is easy, but it does not work:
     <xsd:element name="item">
         <xsd:complexType>
             <xsd:sequence>
                 <xsd:element ref="risid"/>
                 <xsd:choice>
                     <xsd:element ref="waiting"/>
                     <xsd:element ref="passing"/>
                     <xsd:sequence>
                         <xsd:element ref="waiting"/>
                         <xsd:element ref="passing"/>
                     </xsd:sequence>
                 </xsd:choice>
             </xsd:sequence>
         </xsd:complexType>
     </xsd:element>

:0,0: Complex type 'C0' violates the Unique Particle Attribution rule in
its components 'waiting' and 'waiting'

It is possible to write corresponding schema?

Thanks for your solutions.

Stano.

Attachments:
-----------------
test.xml
-----------------
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE result SYSTEM "d:\praca\lucia\klient\dtd.dtd">
<result>
           <item>
                     <risid>DE307001001223</risid>
                     <waiting>
                               <average>13.99</average>
                               <deviation>6.27</deviation>
                               <count>4</count>
                     </waiting>
                     <passing>
                               <average>13.99</average>
                               <deviation>6.27</deviation>
                               <count>4</count>
                     </passing>
           </item>
</result>

----------------
DTD
----------------
<?xml version="1.0" encoding="UTF-8"?>

<!ELEMENT result (item+|error)>

<!ELEMENT error (#PCDATA)>
<!ELEMENT item (risid,(waiting|passing|(waiting,passing)))>

<!ELEMENT risid (#PCDATA)>
<!ELEMENT waiting (average,deviation,count)>
<!ELEMENT passing (average,deviation,count)>

<!ELEMENT average (#PCDATA)>
<!ELEMENT deviation (#PCDATA)>
<!ELEMENT count (#PCDATA)>

-----------------
Scheme
-----------------
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema";>

           <!-- simple elements -->
           <xsd:element name="risid" type="xsd:string"/>
           <xsd:element name="average" type="xsd:decimal"/>
           <xsd:element name="deviation" type="xsd:decimal"/>
           <xsd:element name="count" type="xsd:nonNegativeInteger"/>
           <xsd:element name="error" type="xsd:string"/>

           <!-- complex elements -->
           <xsd:complexType name="record">
                     <xsd:sequence>
                               <xsd:element ref="average"/>
                               <xsd:element ref="deviation"/>
                               <xsd:element ref="count"/>
                     </xsd:sequence>
           </xsd:complexType>
           <xsd:element name="waiting" type="record"/>
           <xsd:element name="passing" type="record"/>

           <xsd:element name="item">
                     <xsd:complexType>
                               <xsd:sequence>
                                          <xsd:element ref="risid"/>
                                          <xsd:choice>
                                                    <xsd:element ref
="waiting"/>
                                                    <xsd:element ref
="passing"/>
                                                    <xsd:sequence>
                                                              <xsd:element
ref="waiting"/>
                                                              <xsd:element
ref="passing"/>
                                                    </xsd:sequence>
                                          </xsd:choice>
                               </xsd:sequence>
                     </xsd:complexType>
           </xsd:element>

           <xsd:element name="result">
                     <xsd:complexType>
                               <xsd:choice>
                                          <xsd:element ref="error"/>
                                          <xsd:element ref="item" maxOccurs
="unbounded"/>
                               </xsd:choice>
                     </xsd:complexType>
           </xsd:element>

</xsd:schema>






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