OT: Schema Q

Folks, 

I am having problems with a XML Schema.  I hope that this is not too
far off topic.  If it is, and someone knows of a mailing-list that
is dedicated to  XML Schema, please enlighten me.

My Q:

There once was an element named text:

<text></text>

It always like to hold onto some text:

<text>I am inside!</text>

But sometime it likes to have another element, bob, appear zero or
more times inside itself:

<text>this is<bob/>all inside<bob/>the element named<bob/>
text</text>

The question is how is the element text defined in a schema?

Sam

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