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   A practical question about XML Schema

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Title: Message
Good morning all,
I'm writing several schemas for a project I'm working on. I've done the work once and it works fine. Now I'm trying to do a better job of it. Since I'm using essentially the same constructs in many cases across a number of different document types, I want to use a common library.
I've run into a snag, probably caused by my "just winging it".
I'm using XLink as the the basis for my schemas which means that I have a number of arcs and locators around. They can easily use the following types:
 <xsd:complexType name="locatortype">
  <xsd:attribute ref="xlink:type" use="optional" fixed="locator"/>
  <xsd:attribute ref="xlink:href" use="required"/>
  <xsd:attribute ref="xlink:role" use="required"/>
  <xsd:attribute ref="xlink:label" use="required"/>
  <xsd:attribute ref="xlink:title"/>
  <xsd:attribute ref="xml:lang"/>
  <xsd:attribute ref="xlink:type" use="optional" fixed="arc" />
  <xsd:attribute ref="xlink:arcrole" use="required"/>
  <xsd:attribute ref="xlink:to" use="optional"/>
  <xsd:attribute ref="xlink:from" use="optional"/>
  <xsd:attribute ref="xlink:title"/>
What I want to be able to do is say that the <content> element uses the locatortype and has a fixed role of www.foo.com/bar. The <use> element is uses the arctype and its to attribute is required, its from is forbidden and the arcrole can be any one of these X things.
I can do all this in a one off sense but it seems to me that I shouldn't need to. One of the things that happened is that we decided to add an attribute to all the nodes doing arc type stuff. Now I have to go edit all the different instances. What I want to do is edit one.
Any thoughts on how to do this?

H. Adam van den Hoven

Web Developer

Credit Union Central of BC

p 604 7306380

e avandenhoven@cucbc.com



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