Additional eléments for XML schema toolbox

[Paule]

Hello,

while the new XML schema Toolbox introduced with version 6.0 is a really nice feature, it would be nice to also include elements like key / keyref / unique.

[cbwhitebu]

Hello,

while the new XML schema Toolbox introduced with version 6.0 is a really nice feature, it would be nice to also include elements like key / keyref / unique.

I agree that this would be a great feature. Right now, if I add an assocation in a class diagram that is modeling an XML schema, then generate the XSD, the association is turned into an attriobute on the referencing type. I need to be able to model some associations as keyrefs to another type instead.

Chris White
Thrasys

[SteveHarris]

Can I add my voice to Key-KeyRef support

This would bring you a long way to full code generation in XML databases.

Steve

[SteveHarris]

I've been thinking about this some more - and while it would be really nice to have some association stereotype that visually associated element components and generated the appropriate key/keyref declarations, there is a very simple way that this could be supported.

If you look at what the generated code looks like, it should be pretty obvious how to provide basic support.

<xs:complexType name="foo">
  <xs:sequence>
...
  <xs:attribute name="foo_ID" type="string"/>
</xs:complexType>

<xs:element name="foo_impl" type="foo">
  <xs:key name="foo_primary_key">
     <xs:selector xpath="foo"/>
     <xs:field xpath="@foo_ID"/>
  </xs:key>
</xs:element>

The complexType and element would be modelled as normal, but the element stereotype would have an extra  dropdown data entry field with options (null);unique;key;keyref.  Selecting a non-null option would reveal extra data entry fields for name, path, refer and selector as appropriate.  While it would be nice to have these extra fields restricted to declared keys/attributes it is certainly not necessary.

Steve