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XML response optional elements

Hi Experts,

In my RPG program I have the following parameters:
DCL-PI *N;
INPUT llikeDs(tmpl001);
OUTPUT likeDs(resp);
end-pi;

The OUTPUT parm has 2 fields in the structure:
Dcl-ds Resp qualified;
Number Char(15);
Error Char(128);
End-ds;

On this moment both elements will be shown in the XML response
<OUTPUT>
<ERROR/>
<NUMBER>12345</NUMBER>
</OUTPUT>

I like to skip the <ERRROR> element when it's not used, how to do that?

Shaun Vermaak

It is defined in the XSD

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
       <xs:element name="OUTPUT">
              <xs:complexType>
                     <xs:sequence>
[b]                            <xs:element name="ERROR" type="xs:string" minOccurs="0"></xs:element>[/b]
                            <xs:element name="NUMBER" type="xs:int"></xs:element>
                        </xs:sequence>
                 </xs:complexType>
          </xs:element>
   </xs:schema>

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Gary Patterson, CISSP

Hi Theo, How are you mapping your response to XML?

Shaun Vermaak

Note, mod changed my post to code so ignore b tags in line 5 that I added for emphasize

Theo Kouwenhoven

ASKER

gary,

DCL-PI *N;
INPUT llikeDs(tmpl001);
OUTPUT likeDs(resp);
end-pi;

if condition x;
output.number = 123
else
output.error = 'err found'
endif

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Gary Patterson, CISSP

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Theo Kouwenhoven

ASKER

Hi Gary,

I'm not transforming to XML, just assigned an Input and output parm in the program that is automatic translated to XML.

Gary Patterson, CISSP

Hi Theo.

Yes. I am an RPG programmer. I see your code, and I understand what you are doing.

What I don't see is the XML transformation. You say it is "automatic". That means that something outside of your program is performing the transformation. What is that?

- Gary

Theo Kouwenhoven

ASKER

That is done by the iSeries webServer (I don't know how) but when I post a Soap message to the Webservice,
it enters my program in a DS (structured) and my Out-parm is returned in XML format

I discovered some more errors, so it's not so cool as I thought it was.

Gary Patterson, CISSP

OK. Afraid I can't help you until you can tell me how the XML transform is being done. Can you ask whoever set it up?

Theo Kouwenhoven

ASKER

I did the setup, just with the Wizzard on the IWS.
1. Choose Soap
2. Choose program
3. Select In-/OutParm
4. Finish
Then I used the WSDL from the properties to test with SoapUI

Gary Patterson, CISSP

That's what I thought. See my earlier comment, above 41964384, and in particular review the attached document, which explains how to handle returning an array which could have multiple elements.

Same technique applies to optional elements.

Theo Kouwenhoven

ASKER

Thanks for your help,
Next question is comming up :-)