Hi all,

I have a Java application which stores customer details in an XML file
and I have an XML schema to match it.  The application provides a GUI
to effectively edit the XML.  So if I have XML like this;

<Customers>
   <Customer>
     <id>0</id>
     <name>John Smith</name>
     <contactDetails>
         <type>email</type>
         <value>jsmith@e...</value>
     </contactDetails>
     <comment>Blah</comment>
   </Customer>
</Customers>

and a schema

<xs:element name="Customers" type="CustomersType"/>

<xs:complexType name="CustomersType">
   <xs:sequence>
      <xs:element name="Customer" type="CustomerType" minOccurs="0"
maxOccurs="unbounded" />
   </xs:sequence>
</xs:complexType>

<xs:complexType name="CustomerType">
  <xs:sequence>
    <xs:element name="id" type="int" minOccurs="1" maxOccurs="1"/>
    <xs:element name="name" type="string" minOccurs="1" maxOccurs="1"/
>
    <xs:element name="contactDetails" type="contactDetailsType"
minOccurs="1" maxOccurs="2"/>
    <xs:element name="comment" type="string" minOccurs="0"
maxOccurs="1"/>
  </xs:sequence>
</xs:complexType>

<xs:complexType name="contactDetailsType">
     <xs:sequence>
        <xs:element name="type" type="contactType" minOccurs="1"
maxOccurs="1"/>
        <xs:element name="value" type="string" minOccurs="1"
maxOccurs="1"/>
    </xs:sequence>
</xs:complexType>

<xs:complexType name="contactType">
    <xs:restriction base="xs:string">
        <xs:enumeration value="email"/>
        <xs:enumeration value="phone"/>
    </xs:restriction>
</xs:complexType>

I want to provide a GUI to edit that.  The trick is I don't want to
hard-code the names of the fields etc.  So if the GUI provides a form
to edit said customer then they would have a form that has;

id [ 0 ] *
name [ John Smith ] *
contact type [ email ]*
contact value [ johnsmith@e... ] *
comment [ Blah ]
* indicates required field

and I could easily add say a third contact type (postal address) and I
wouldn't have to write any code to do this.

This feels like a fairly generic and common exercise so I hope someone
else has done it.

Regards,

John