[xml] problems validating a XML doc

["MDC A." <comymar yahoo es>]

hi,

I have started to use the libxml2.2.4.15 on Solaris
2.8, and I have a problem when I try to validate a
memory buffer against a DTD that I have parsed before.
My DTD is like this:

<?xml encoding="ISO-8859-1"?>

<!ELEMENT REQ (CLIENT,LIR)>
<!ATTLIST REQ ver CDATA #FIXED "3.00">
<!ELEMENT CLIENT (ID, PWD)>
<!ELEMENT ID (#PCDATA)>
<!ELEMENT PWD (#PCDATA)>
<!ELEMENT LIR (MSIDS, QoS?, GEO_INFO?)>
<!ELEMENT MSIDS ((MSID | MSID_RANGE)+, MSID_TYPE?)>
<!ELEMENT MSID (#PCDATA)>
<!ELEMENT MSID_RANGE (START_MSID, STOP_MSID)>
<!ELEMENT START_MSID (#PCDATA)>
<!ELEMENT STOP_MSID (#PCDATA)>
<!ELEMENT MSID_TYPE (#PCDATA)>
<!ELEMENT GEO_INFO (COORD_SYS?, DATUM?, FORMAT?)>
<!ELEMENT COORD_SYS (#PCDATA)>
<!ELEMENT DATUM (#PCDATA)>
<!ELEMENT FORMAT (#PCDATA)>
<!ELEMENT QoS (MAX_DEL?)>
<!ELEMENT MAX_DEL (#PCDATA)>

and the XML doc I try to validate is that one:
<?xml version = \"1.0\" encoding = \"ISO-8859-1\"
standalone = \"no\"?>\n\
<!DOCTYPE REQ SYSTEM \"prueba.dtd\">\n\
<REQ ver=\"3.00\">\n\
 <CLIENT>\n\
  <ID> antonio</ID>\n\
  <PWD> antonio</PWD>\n\
 </CLIENT>\n\
 <LIR>\n\
  <MSIDS>\n\
   <MSID> 3412345678</MSID>\n\
   <MSID_RANGE>\n\
    <START_MSID> 34555555</START_MSID>\n\
    <STOP_MSID> 34666666</STOP_MSID>\n\
   </MSID_RANGE>\n\
   <MSID_TYPE> MSISDN</MSID_TYPE>\n\
  </MSIDS>\n\
<GEO_INFO>\n\
   <COORD_SYS> LL</COORD_SYS>\n\
   <DATUM> WGS-84</DATUM>\n\
   <FORMAT> IDMS0</FORMAT>\n\
  </GEO_INFO>\n\
 </LIR>\n\
</REQ>

Accord to my DTD the Element MSIDS of my XML doc is
not right, because it only can have one children
between MSID and MSID_RANGE (
<!ELEMENT MSIDS ((MSID | MSID_RANGE)+, MSID_TYPE?)>  )
and it has both. But when I try to parse it with 
xmlValidateDTD() I obtain a returned value of 1 (so,
it validates it).
If I change the MSIDS Element in the DTD definition
and
I define it like
<!ELEMENT MSIDS ((MSID | MSID_RANGE), MSID_TYPE?)>
and I try to validate the same XML doc,
it works ok, and I obtain a returned value of 0.

Is the first definition of my DTD possible or I can't
define the element MSIDS like
<!ELEMENT MSIDS ((MSID | MSID_RANGE)+, MSID_TYPE?)>?

Is it a bug of the librarie?

Am I making something wrong?

Can I validate it by another way? I need a quickly 
validation so it isn't efficient for me to use 
xmlValidateDocument() (I have try to use this function
but it doesn't work right with a DTD definition like
that one: 
<!ELEMENT MSIDS ((MSID | MSID_RANGE)+, MSID_TYPE?)>)

I implement the following steps in my code:

 xmlDocPtr arbol = NULL;

 arbol =
xmlParseMemory(XMLInMemBuf,strlen(XMLInMemBuf));
 if (arbol == NULL)
    {
      printf("ERROR\n");
      xmlFreeDoc(arbol);
      xmlCleanupParser();
      exit(-1);
    }

xmlValidCtxtPtr ptrCtxt = (struct _xmlValidCtxt
*)malloc(sizeof(struct _xmlValidCtxt);

  ptrCtxt->error=(xmlValidityErrorFunc)trataError;

ptrCtxt->warning=(xmlValidityWarningFunc)trataWarning;

 xmlDtdPtr ptrDTD = NULL; 

 xmlChar *systemID = BAD_CAST("prueba");

  ptrDTD = xmlParseDTD(NULL,systemID);

 if (ptrDTD == NULL)
    {
      printf("ERROR\n");
      xmlFreeDoc(arbol);
      xmlCleanupParser();
      exit(-1);
    }

resultado = xmlValidateDtd(ptrCtxt, arbol, ptrDTD);

if (resultado == 0)
    {
      printf("ERROR\n");
      xmlFreeDoc(arbol);
      xmlFreeDtd(ptrDTD);
      xmlCleanupParser();
      exit(-1);
    }

thanks a lot for your help and time.


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