Help with cvc-elt.1 error

[Chalker, Dean]

 

Hi all,

 

I'm working on the implementation of XPointer, and I'm puzzled with an "error" being reported by XMLSchemaValidator.

 

With an included document that intentionally has no schema, I get the following error reported:

 

   [Error] planets.xml:2:58: cvc-elt.1: Cannot find the declaration of element 'PLANETS'.

 

 

The code in XMLSchemaValidator where this is reported from has an interesting comment ...

 

    // We don't call reportSchemaError here, because the spec
    // doesn't think it's invalid not to be able to find a
    // declaration or type definition for an element. Xerces is
    // reporting it as an error for historical reasons, but in
    // PSVI, we shouldn't mark this element as invalid because
    // of this. - SG
    fXSIErrorReporter.fErrorReporter.reportError(
     XSMessageFormatter.SCHEMA_DOMAIN,
     "cvc-elt.1",
     new Object[] { element.rawname },
     XMLErrorReporter.SEVERITY_ERROR);

 

What I would like is for the included document to be automatically validated if it has actually has a schema, but not if it doesn't.  I would have expected that this is what xerces would have done for me.  The pre-existing code in XIncludeHandler disables the scheme validation feature with the following code

 

            // we don't want a schema validator on the new pipeline,
            // so we set it to false, regardless of what was copied above
            fChildConfig.setFeature(
                Constants.XERCES_FEATURE_PREFIX + Constants.SCHEMA_VALIDATION_FEATURE,
                false);

 

But I need to modify this to conditionally validate when there is an XPointer _expression_, since this _expression_ may refer to schema-definied IDs.  If I enable schema validation but the included XML does not have a schema, then I get this "error" reported.  My understanding of XPointer is that not finding schema-defined IDs is not an error: you just don't get any output.

 

I have code that functions as I want to to, except that this "error" is reported.  I am concerned that users of my code will see xerces reporting this error.

 

Can someone shed some light on the intent on this reported "error" please?  I'm guessing that I could just wrap the offending reportError() call with a guard condition, perhaps ...

 

    if (fDoValidation) {

        fXSIErrorReporter.fErrorReporter.reportError( ... );
    }

 

but I am cautious of doing so without understanding the historical reasons.

 

Thanks in advance

Dean

 

 

 

 

 

INTERGRAPH
Dean Chalker
Distinguished Design Engineer (R&D)
IntelliWhere Product Development Center

Intergraph Mapping and Geospatial Solutions

Level 3/299 Coronation Drive

Milton  Brisbane

Austalia  4064

Phone:  +61 (0)7 3510 8918
Fax:    +61 (0)7 3510 8901
E-mail: [EMAIL PROTECTED]
URL: imgs.intergraph.com