a more generic schema

[Wilhelm Pieper]

Hello,

HowTo: create a more generic schema for tree-style objects.
(Generic in the sense of unknown depth).
eg:
<root>
<node>
<node>
.. <leaf>..</leaf> ..
</node>
</node>
..
<node>..
</node>
</root>

A link would help where an explanation is given for such a schema.

wkr: Wilhelm Pieper

[Wilhelm Pieper]

Dear Oleg,
thanks to your reply.
I tried it out and got an error:
"The same table(node) cannot be the child table in two nested relations."
I think it will be better for me to read on some material about schema (like
that in w3schools.com)and come back then :-)

wkr: Wilhelm Pieper

"Oleg Tkachenko" <oleg@NO_SPAM_PLEASEtkachenko.com> schrieb im Newsbeitrag
news:eb**************@tk2msftngp13.phx.gbl...
...

Well, just define an element, which is able to contain elements with the same name and type and that's it:
<xs:complexType name="nodeType">
<xs:choice>
<xs:element name="node" type="nodeType"/>
<xs:element name="leaf" type="xs:string"/>
</xs:choice>
</xs:complexType>
<xs:element name="root">
<xs:complexType>
<xs:sequence>
<xs:element name="node" type="nodeType"/>
</xs:sequence>
</xs:complexType>
</xs:element>

[Wilhelm Pieper]

Ahh - thanks, now I can understand the error-mess a little better :-)
wkr: Wilhelm Pieper
"Chris Lovett" :.

This is a limitation of the DataSet class. The DataSet class does a mapping from XSD to a relational shape with tables and columns, and the DataSet does not support recurrsion like this.

...

I tried it out and got an error:
"The same table(node) cannot be the child table in two nested

relations."