[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Schema validation question
Using elements as data rather than metadata - very offensive indeed. ;) There is no solution for this with W3C Schema, but it can be done with Schematron. Kind Regards, Joe Chiusano Booz | Allen | Hamilton Strategy and Technology Consultants to the World Linda Grimaldi wrote: > > I have been out of the XML world for a little while now, but someone just asked me a question and I have to admit, it's going to keep me up tonight if I can't come up with a better solution. And I'm a little rusty, to boot... > > The issue is one of data dependency and validation. The goal is to enforce a restriction on pairs of data values- if the data associated with the node <Fruit><Name> is "Apple", then the value of the sibling node <Fruit><Abbrev> must be "APL". Effectively, the goal is to enforce a specific mapping from one enum into another within an XML document. The only way my associate could figure to capture this dependency is as follows: > > <xs:complexType name="Fruit"> > <xs:annotation> > <xs:documentation>Defines the valid values for fruit types</xs:documentation> > </xs:annotation> > <xs:choice> > <xs:element name="APL" type="xs:token" fixed="Apple"/> > <xs:element name="ORG" type="xs:token" fixed="Orange"/> > <xs:element name="BAN" type="xs:token" fixed="Banana"/> > <xs:element name="LEM" type="xs:token" fixed="Lemon"/> > <xs:element name="GRP" type="xs:token" fixed="Grape"/> > </xs:choice> > </xs:complexType> > > All in all, this strikes me as a very ugly, even offensive, solution. My initial response was to forget about the validation- it wasn't worth it. Is there a way to preserve the data dependency validation without warping the instance document as the above schema fragment would require? > > Thanks, > Linda > > ----------------------------------------------------------------- > The xml-dev list is sponsored by XML.org <http://www.xml.org>, an > initiative of OASIS <http://www.oasis-open.org> > > The list archives are at http://lists.xml.org/archives/xml-dev/ > > To subscribe or unsubscribe from this list use the subscription > manager: <http://www.oasis-open.org/mlmanage/index.php> -- Kind Regards, Joseph Chiusano Associate Booz | Allen | Hamilton
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