XSD - Attribute Question **SOLVED**

[Sgt-Peppa]

Hey all,

I have a question concerning attributes in XSD Schemas.

If I define an Attribute like this:

<xsd:attribute name="blah" type="myType">

there is an additional Attribute called use that one could insert.

Like this:
<xsd:attribute name="blah" type="myType" use="Optional/Prohibited/Required">

What are the results if I inserted either one of those three?

How would my Attribute need to like if I inserted that use Statement?

Hope I explained well (I doubt it,...)

Thanks Stephan

[shunt]

"Optional" : You can have the attribute in the tag if you want, but if you don't, no one will care...
"Prohibited" : You can never have this attribute in the tag.
"Required" : You must always have this attribute in the tag.

The following examples are valid tags:

<Optional>
  <tag blah="myvalue" />
  <tag />
</Optional>
<Prohibited>
  <tag />
</Prohibited>
<Required>
  <tag blah="myvalue" />
</Required>

[Sgt-Peppa]

Ok, thanks for the explanation.
I have an Application that provides an Xml Interface. I have the Schema, and I am trying to generate a valid instance to it. The schema says that the attribute is prohibited. If I dont send the attribute I get an error Message saying that the required attribute is missing, if I send it i get an error message saying that the value is not valid,even if it is, seems like a bug. I just wanted to make sure.

Thanks for the help,

Stephan

[shunt]

check the definition of type="myType"... perhaps this type declaration has some other definition that specifies what the format of the data should be....

[Sgt-Peppa]

I already did. It says it should be a number. \d+ is the reg ex used for that. But it should not matter cause as you said I should not be sending that Attibute at all right?

[shunt]

Yes, thats right.... I don't know about your regexp. Have not tested it, but shouldnt you just use one of the built in datatypes? For an integer, use type="xs:integer" to define a number. This of course assumes that you have defined your schema definition as xmlns:xs="http://www.w3.org/2001/XMLSchema"....so

<xs:element name="tag">
   <xs:complexType>
      <xs:attribute name="blah" type="xs:integer" use="optional"/>
   </xs:complexType>
</xs:element>

[Sgt-Peppa]

The Schema is not defined by me. I am only trying to create a valid Instance. And they did use a custom Datatype follwed by restrictions. Thanks for all your time and help, I really appreciate it!

Stephan