Re: [xml] Query regarding IDCs handling during schema parsing.

[Daniel Veillard <veillard redhat com>]

On Fri, Nov 09, 2007 at 02:14:33PM +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.

  Frankly I have no idea, I don't understand the details of XSD or of the
associated code.

Daniel

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