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3 Replies Latest reply: Sep 11, 2012 7:05 AM by PiotrBazan RSS

AIA Query operations - how to return no elements?

PiotrBazan Newbie
Currently Being Moderated
Hello,

I've noticed all query response messages for different EBOs found in AIA metadata are defined following the below pattern (ItemEBO as an example):

Simple query response:

<xsd:complexType name="QueryItemResponseEBMType">
     <xsd:complexContent>
          <xsd:extension base="corecom:EBMType">
               <xsd:sequence>
                    <xsd:element name="DataArea" type="QueryItemResponseDataAreaType"/> <---- one and only one
               </xsd:sequence>
          </xsd:extension>
     </xsd:complexContent>
</xsd:complexType>

List query response:

<xsd:complexType name="QueryItemListResponseEBMType">
     <xsd:complexContent>
          <xsd:extension base="corecom:EBMType">
               <xsd:sequence>
                    <xsd:element name="DataArea" type="QueryItemListResponseDataAreaType" maxOccurs="unbounded"/> <---- one or more
               </xsd:sequence>
          </xsd:extension>
     </xsd:complexContent>
</xsd:complexType>

As shown above the schema force responses to always contain at least one DataArea.

But what if a queried resource returns no results ? What should be returned in a response? It looks to me a business fault is the only solution here but it doesn't seem to be the right solution for most cases.

Thanks,
Piotr

Edited by: Piotr Bazan on Jul 18, 2012 6:44 AM

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