Re: [xml] Issue in DTD validation thru Libxml

[John Fleck <jfleck inkstain net>]

Senthil -

My guess, without seeing your full code, is that you didn't initialize
cvp:

cvp = xmlNewValidCtxt();

The following works correctly on your test files, returning 0 rather
than 1:

int
main() {
        int valid;
        xmlDocPtr doc;
        xmlValidCtxtPtr cvp;
        xmlDtdPtr dtd;
        cvp = xmlNewValidCtxt();
        doc = xmlReadFile("test.xml", NULL, 0);
        dtd = xmlParseDTD(NULL,"sample.dtd" );

        valid=xmlValidateDtd(cvp, doc, dtd); 
        printf("%d\n", valid);
        return 0;
}

xmllint.c is a full of usable examples for carrying out basic functions
such as this.

Cheers,
John

On Thu, 2004-01-22 at 07:39, Senthil S wrote:
> Hello everybody,
>                       I am new to this forum.I need a great help from
> this forum.
> Actually i am using libxml 2.2.6  for creating dom(xmldocptr)  in unix
> environment.I have a DTD file already existing in file format.I need
> to validate the DTD with the dom.
>  
> The following is the code construct:
>  
>  doc = xmlReadFile("sample.xml", NULL, 0);
>  dtd = xmlParseDTD(NULL,"sample.dtd" ); /* parse the DTD */
>  valid=xmlValidateDtd(&cvp, doc, dtd); 
>  
> the input sample.xml is
> <?xml version="1.0"?>
> <!DOCTYPE note SYSTEM "sample.dtd">
> <note>
>  <from/>
> </note>
>  
> sample.dtd
> <!ELEMENT note (to,from,heading,body)>
> <!ELEMENT to (#PCDATA)>
> <!ELEMENT from (#PCDATA)>
> <!ELEMENT heading (#PCDATA)>
> <!ELEMENT body (#PCDATA)>
>  
> when i validate the xml file with the dtd using the above code, it
> returns 1 which describes xml is valid.
>  
> To my understanding of xml, it should be invalid as the
> to,from,heading are sequence children to note element. 
> Could anybody help me to resolve this issue using libxml?
>  
> Thanks,
> S.Senthil
>  
>  
>  
>