Re: [xml-dev] Possible to use wildcards in schema element names?

[Hermann Stamm-Wilbrandt <STAMMW@de.ibm.com>]

Hi Jimmy,

> My question then is, "Is it possible, in the schema, to use wildcards
> or regex for the field elements?
No, the name attribute of xsd:element is of type NCName:
http://www.w3.org/TR/2004/REC-xmlschema-1-20041028/structures.html#element-element

And a NCName is a XML Name without a colon:
http://www.w3.org/TR/REC-xml-names/#NT-NCName


But if you know a maximal number of different field elements (eg. 9):
(maxOccurs default value is "1")

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
elementFormDefault="qualified">
 <xs:element name="document">
   <xs:complexType>
     <xs:sequence>
       <xs:choice maxOccurs="unbounded">
         <xs:element ref="name"/>
         <xs:element ref="field1" minOccurs="0"/>
         <xs:element ref="field2" minOccurs="0"/>
         <xs:element ref="field3" minOccurs="0"/>
         <xs:element ref="field4" minOccurs="0"/>
         <xs:element ref="field5" minOccurs="0"/>
         <xs:element ref="field6" minOccurs="0"/>
         <xs:element ref="field7" minOccurs="0"/>
         <xs:element ref="field8" minOccurs="0"/>
         <xs:element ref="field9" minOccurs="0"/>
       </xs:choice>
     </xs:sequence>
   </xs:complexType>
 </xs:element>
 <xs:element name="name" type="xs:NCName"/>
 <xs:element name="field1" type="xs:NCName"/>
 <xs:element name="field2" type="xs:NCName"/>
 <xs:element name="field3" type="xs:NCName"/>
 <xs:element name="field4" type="xs:NCName"/>
 <xs:element name="field5" type="xs:NCName"/>
 <xs:element name="field6" type="xs:NCName"/>
 <xs:element name="field7" type="xs:NCName"/>
 <xs:element name="field8" type="xs:NCName"/>
 <xs:element name="field9" type="xs:NCName"/>
</xs:schema>


Mit besten Gruessen / Best wishes,

Hermann Stamm-Wilbrandt
Developer, XML Compiler, L3
Fixpack team lead
WebSphere DataPower SOA Appliances
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From:       Kevin Gibbs <kevin.kgibbs@gmail.com>
To:         xml-dev <xml-dev@lists.xml.org>
Date:       11/26/2010 11:12 PM
Subject:    [xml-dev] Possible to use wildcards in schema element names?



Hi all,
I'm trying to generate a schema for some xml (for which I have no
control over the format)
Consider the following xml example:
<?xml version="1.0" encoding="UTF-8"?>
<document>
   <name>Bill</name>
   <field1>abc</field1> <!-- any number of fields -->
   <field2>def</field2>
   <field3>ghi</field3>
   <field4>jkl</field4>

   <name>John</name>
   <field3>uvw</field3> <!-- need not start with field1 -->
   <field4>xyz</field4>
</document>

As you can see, each "name" element has a varying number of "field*"
siblings.
So, I've come with the following attempt (the eagle-eyed among you,
may notice that I'm no expert):
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
elementFormDefault="qualified">
 <xs:element name="document">
   <xs:complexType>
     <xs:sequence>
       <xs:choice maxOccurs="unbounded">
         <xs:element ref="name"/>
         <xs:element ref="field" maxOccurs="unbounded"/>
       </xs:choice>
     </xs:sequence>
   </xs:complexType>
 </xs:element>
 <xs:element name="name" type="xs:NCName"/>
 <xs:element name="field*" type="xs:NCName"/> <!-- How is it possible
to
perform wildcard? -->
</xs:schema>

My question then is, "Is it possible, in the schema, to use wildcards
or regex for the field elements?

Many thanks in anticipation - Jimmy

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