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| | | Altova Mailing List Archives>Archive Index >xmlschema-dev Archive Home >Recent entries >Thread Prev - >Thread Next - Re: Both extending and restricting with Both extending and restricting withTo: xmlschema-dev@--.--- Date: 4/1/2005 4:10:00 AM (Apologies if this message is received more than once -- yesterday's attempt seems to have not gone through.) I originally thought that XML Schema didn't permit "replacing" an element with another via <redefine>, i.e. both extending and restricting a content model, but the spec doesn't seem to forbid doing it in two steps... so I whipped up an example. Unfortunately, I'm getting mixed validation results. a.xsd (http://www.ruleml.org/0.89/xsd/a.xsd) defines an element "body" which allows only the element "x". b.xsd (http://www.ruleml.org/0.89/xsd/b.xsd) redefines "body" from a.xsd, first extending it to allow a new element "y" and then restricting it to disallow "x", effectively replacing "x" with "y" in the content model of "body". Assuming this is permissible in XML Schema... ab.ruleml (http://www.ruleml.org/0.89/exa/ab.ruleml) should not be valid w.r.t. b.xsd because "body" contains an "x". XSV (web form and installation) reports no validity problems but crashes. Saxon correctly (?) identifies the problem, as appended below. So I'm left with the question: is this the correct way to "replace" an element with another in a content model via <redefine> (if possible at all with XML Schema)? And what about the validators? Thanks, David *** java com.saxonica.Validate -t http://www.ruleml.org/0.89/exa/ab.ruleml Saxon-SA 8.3 from Saxonica Java version 1.5.0_01 Processing http://www.ruleml.org/0.89/exa/ab.ruleml Loading schema document http://www.ruleml.org/0.89/xsd/b.xsd Loading schema document http://www.ruleml.org/0.89/xsd/a.xsd Finished loading schema document http://www.ruleml.org/0.89/xsd/a.xsd Finished loading schema document http://www.ruleml.org/0.89/xsd/b.xsd Validation error on line 5 column 4 of http://www.ruleml.org/0.89/exa/ab.ruleml: In content of element <body>: The content model does not allow element <x> to appear here. Expected: {http://www.ruleml.org/0.89/xsd}y Validation error on line 7 column 8 of http://www.ruleml.org/0.89/exa/ab.ruleml: One or more validation errors were reported Validation of source document failed From mike@s... Fri Apr 01 14:34:37 2005 Received: from lisa.w3.org | |
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