FW: problem with using the "| " in the field element under the key element

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FW: problem with using the "| " in the field element under the key
element

2003-05-22 - By Bill Riegel

>From a thread on xml-dev@(protected) <mailto:xml-dev@(protected)> ,

I am having problems parsing the instance below. I am using a "|" in the
field element of the key named kActivity in the
Referenced XML Schema file ( included ).

My last email on the xml-dev email list.

It seems from the discussion that you can have the Pipe, "|" in the field
xpath. So why does Xerces fails when parsing this student3.xml

Xerces fails when parsing the student3.xml
SEVERE: java.lang.RuntimeException: org.xml.sax.SAXParseException: Identity
Constraint error (cvc-identity-constraint.4.2.1): element
"studentActivities" has a key with no value.

My guess is that it only sees the act:name in the field definition
<field xpath="act:name|act:desc"/>

Note: If I have only name elements under activity. Xerces is happy.

So what is wrong ?

Schema
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="http://www.exampleU.com/activity"
xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:act="http://www.exampleU.com/activity" elementFormDefault="qualified">
<element name="studentActivity">
<complexType>
<sequence>
<element name="studentID" type="normalizedString"/>
<element name="activity" type="normalizedString"/>

</sequence>
</complexType>
</element>
<element name="activity">
<complexType>
<sequence>
<choice>
<element name="name" type="normalizedString"/>
<element name="desc" type="normalizedString"/>
</choice>
<element name="fee" type="decimal"/>
</sequence>
</complexType>
</element>
<element name="studentActivities">
<complexType>
<sequence>
<element ref="act:studentActivity" maxOccurs="unbounded"/>
<element name="activities">
<complexType>
<sequence>
<element ref="act:activity" maxOccurs="unbounded"/>
</sequence>
</complexType>
</element>
</sequence>
</complexType>

<keyref name="krActivity" refer="act:kActivity">
<selector xpath="act:studentActivity"/>
<field xpath="act:activity"/>
</keyref>

<key name="kActivity">
<selector xpath="act:activities/act:activity"/>
<field xpath="act:name|act:desc"/>
</key>
</element>
</schema>

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

<studentActivities xmlns="http://www.exampleU.com/activity"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.exampleU.com/activity
student3.xsd">
<studentActivity>
<studentID>sn42</studentID>
<activity>Swimming</activity>
</studentActivity>
<studentActivity>
<studentID>sn44</studentID>
<activity>Polo</activity>
</studentActivity>
<studentActivity>
<studentID>sn49</studentID>
<activity>Swimming</activity>
</studentActivity>
<studentActivity>
<studentID>sn11</studentID>
<activity>Swimming</activity>
</studentActivity>
<studentActivity>
<studentID>sn43</studentID>
<activity>Bowling</activity>
</studentActivity>
<activities>
<activity>
 
<desc>Swimming</desc> 

<fee>47.50</fee> 
</activity>
<activity>
<name>Polo</name>

<fee>789.99</fee>
</activity>
<activity>
<name>Bowling</name>
<fee>38.50</fee>
</activity>
</activities>
</studentActivities>

Bill Riegel
LandMark Graphics
713-839-3388

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<o:p> </o:p>

From
a thread on <a href="mailto:xml-dev@(protected)">xml-dev@(protected)</a> ,
<o:p></o:p>

<o:p> </o:p>

I
am having problems parsing the instance below. I am using a "|" in
the field element of the key named kActivity in the<o:p></o:p>

Referenced
XML Schema file ( included ).<o:p></o:p>

<o:p> </o:p>

<o:p> </o:p>

My
last email on the xml-dev email list. <o:p></o:p>

<o:p> </o:p>

<o:p> </o:p>

It
seems from the discussion that you can have the Pipe, "|" in the
field xpath. So why does Xerces fails when parsing this student3.xml<o:p></o:p>


<o:p> </o:p>

Xerces
fails when parsing the student3.xml<o:p></o:p>

SEVERE:
java.lang.RuntimeException: org.xml.sax.SAXParseException: Identity Constraint
error (cvc-identity-constraint.4.2.1): 
element "studentActivities" has a key with no value.<o:p></o:p
>

<o:p> </o:p>

<o:p> </o:p>

My
guess is that it only sees the act:name in the field definition<o:p></o:p>

      <field
xpath="act:name|act:desc"/><o:p></o:p>

<o:p> </o:p>

Note:
If I have only name elements under activity. Xerces is happy.<o:p></o:p>


<o:p> </o:p>

So
what is wrong ?<o:p></o:p>

<o:p> </o:p>

<o:p> </o:p>

Schema<o:p></o:p>

<?xml
version="1.0" encoding="UTF-8"?><o:p></o:p>

<schema
targetNamespace="http://www.exampleU.com/activity"
xmlns="http://www.w3.org/2001/XMLSchema" xmlns:act="http://www
.exampleU.com/activity"
elementFormDefault="qualified"><o:p></o:p>

  <element
name="studentActivity"><o:p></o:p>

    <complexType><o:p></o
:p>

      <sequence>
<o:p></o:p>

       
<element name="studentID"
type="normalizedString"/><o:p></o:p>

       
<element name="activity" type="normalizedString"/
><o:p></o:p>

       
<o:p></o:p>

     
</sequence><o:p></o:p>

    </complexType><o:p></o
:p>

  </element><o:p></o:p>

  <element
name="activity"><o:p></o:p>

    <complexType><o:p></o
:p>

      <sequence>
<o:p></o:p>

       
<choice><o:p></o:p>

         
<element name="name" type="normalizedString"/>
<o:p></o:p>

         
<element name="desc" type="normalizedString"/>
<o:p></o:p>

       
</choice><o:p></o:p>

       
<element name="fee" type="decimal"/><o:p></o:p
>

     
</sequence><o:p></o:p>

    </complexType><o:p></o
:p>

  </element><o:p></o:p>

  <element
name="studentActivities"><o:p></o:p>

    <complexType><o:p></o
:p>

      <sequence>
<o:p></o:p>

        <element
ref="act:studentActivity" maxOccurs="unbounded"/><o:p><
/o:p>

       
<element name="activities"><o:p></o:p>

         
<complexType><o:p></o:p>

         
  
<sequence><o:p></o:p>

         
    
<element ref="act:activity"
maxOccurs="unbounded"/><o:p></o:p>

         
  
</sequence><o:p></o:p>

         
</complexType><o:p></o:p>

       
</element><o:p></o:p>

     
</sequence><o:p></o:p>

    </complexType><o:p></o
:p>

    <o:p></o:p>

    <keyref
name="krActivity" refer="act:kActivity"><o:p></o:p>

      <selector
xpath="act:studentActivity"/><o:p></o:p>

      <field
xpath="act:activity"/><o:p></o:p>

    </keyref><o:p></o:p>

    <o:p></o:p>

    <key
name="kActivity"><o:p></o:p>

      <selector
xpath="act:activities/act:activity"/><o:p></o:p>

      <field
xpath="act:name|act:desc"/><o:p></o:p>

    </key><o:p></o:p>

  </element><o:p></o:p>

</schema><o:p></o:p>

<o:p> </o:p>

instance<o:p></o:p>

<?xml
version="1.0" encoding="UTF-8"?><o:p></o:p>

 <studentActivities
xmlns="http://www.exampleU.com/activity"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.exampleU.com/activity<o:p></o:p>

 student3.xsd"><o:p></o:p>

  <studentActivity><o:p></o:p>

   
<studentID>sn42</studentID><o:p></o:p>

   
<activity>Swimming</activity><o:p></o:p>

  </studentActivity><o:p></o:p>

  <studentActivity><o:p></o:p>

   
<studentID>sn44</studentID><o:p></o:p>

   
<activity>Polo</activity><o:p></o:p>

  </studentActivity><o:p></o:p>

  <studentActivity><o:p></o:p>

   
<studentID>sn49</studentID><o:p></o:p>

   
<activity>Swimming</activity><o:p></o:p>

  </studentActivity><o:p></o:p>

  <studentActivity><o:p></o:p>

   
<studentID>sn11</studentID><o:p></o:p>

   
<activity>Swimming</activity><o:p></o:p>

  </studentActivity><o:p></o:p>

  <studentActivity><o:p></o:p>

   
<studentID>sn43</studentID><o:p></o:p>

   
<activity>Bowling</activity><o:p></o:p>

  </studentActivity><o:p></o:p>

  <activities><o:p></o:p>

    <activity><o:p></o:p>

     
      <o:p></o:p>

     
<desc>Swimming</desc>         
     
         
        
<o:p></o:p>

     
<fee>47.50</fee>         
          
<o:p></o:p>

    </activity><o:p></o:p>


    <activity><o:p></o:p>

     
<name>Polo</name><o:p></o:p>

     
<o:p></o:p>


     
<fee>789.99</fee><o:p></o:p>

    </activity><o:p></o:p>


    <activity><o:p></o:p>

     
<name>Bowling</name><o:p></o:p>

     
<fee>38.50</fee><o:p></o:p>

    </activity><o:p></o:p>


  </activities><o:p></o:p>

</studentActivities><o:p></o:p>

<o:p> </o:p>

<o:p> </o:p>

Bill Riegel<o:p></o:p>

LandMark Graphics<o:p></o:p>

713-839-3388<o:p></o:p>

<o:p> </o:p>

</div>

</body>

</html>

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