• From: "Costello, Roger L." <costello@m...>
• To: "xml-dev@l..." <xml-dev@l...>
• Date: Wed, 10 Jul 2019 12:01:17 +0000

Hi Folks,

The following XML Schema declares an element to be nillable and the element has a default value:

<xs:element name="test" type="xs:string" nillable="true" default="Hello, world" />

That is legal but is it meaningful?

What does this (schema-valid) XML instance mean:

<test xsi:nil="true"></test>

xsi:nil="true" indicates that there is no information available for the <test> element. The default value indicates that there is information available for the <test> element and the information is "Hello, world". 

Right? 

Isn't that a contradiction?

/Roger

• Follow-Ups:
  • Re: Does it make sense to have a default with a nillable element?
    • From: ht@m... (Henry S. Thompson)
  • Re: Does it make sense to have a default with a nillable element?
    • From: David Carlisle <d.p.carlisle@g...>
  • Re: Does it make sense to have a default with a nillable element?
    • From: Peter Hunsberger <peter.hunsberger@g...>