Re: [xml] Query regarding IDcs in schema validation

[Daniel Veillard <veillard redhat com>]

On Fri, Oct 26, 2007 at 09:41:04AM +0800, nagesh wrote:
> Hi,
> 	I have a query about schema validation, when the schema document is
> having IDC. My schema document is such that, the main schema will import the
> child schema which has an IDC definition (key) for an element. So when the
> schema parsing is completed successfully, the IDC definition for that
> element will be stored in the child schema data structure created for this
> child schema.
> 	However when the validation of the input document starts, In the
> function xmlSchemaPreRun( ), it checks for the presence of IDC definition
> only in the main schema,
> 27899 if (vctxt->schema->idcDef != NULL) {
> 27900 	xmlHashScan(vctxt->schema->idcDef,
> 27901	    (xmlHashScanner) xmlSchemaAugmentIDC, vctxt);
> 27902    }
> 	Because of this check, in the validation context, "vctxt->aidcs"
> will be set only if the main schema has IDC definition. So when the
> validation of the element declaration starts against it's definition present
> in the schema file, the check for the IDC fails, since it is not able to
> find the IDC definition for the same.
> 
> Function: xmlSchemaIDCRegisterMatchers
> 
> 23109	aidc = vctxt->aidcs;
> 23110	while (aidc != NULL) {
> 23111	    if (aidc->def == idc)
> 23112		break;
> 23113	    aidc = aidc->next;
> 23114	}
> 23115	if (aidc == NULL) {
> 23116	    VERROR_INT("xmlSchemaIDCRegisterMatchers",
> 23117		"Could not find an augmented IDC item for an IDC
> definition");
> 23118	    return (-1);
> 23119	}
> 	
> 	So in the function, xmlSchemaPreRun( ), should it check for all the
> schema pointers for the presence of Augmented IDC definitions in all the
> main and child schema pointers?
> Thanks in advance for the reply.

  I don't know the fine details (sic.) of XML Schemas but your report sounds
right. Can you build a patch for this issue ?

Daniel

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