[xml] Ask an XPath problem

["½²µO¨Ó(²§±d)" <kltsai ecomuniversal com tw>]

Hi all:
	
	I want to get the attributes from the following Xml:
		<?xml version="1.0"?><Object Id="a123">test123<Word>Wahaha</Word></Object>
	So, I use the following Location Path trying to select the attributes. I expect to get Id, a123, but I
	get "<Object></Object>" instead. 
		(//. | //@* | //namespace::*)[attribute::*]
	
	My testing program is as follows. Could anyone tell me how to select all attribute nodes from the 
	context node? Thanks in advance.

	
int 
main()
{
	xmlDocPtr pXml = NULL ;
	xmlXPathContextPtr cTxt = NULL ;
	xmlXPathObjectPtr xpathObj = NULL ; 
	xmlNodeSetPtr pNodeSet = NULL ;
	xmlOutputBufferPtr pOutBuff = NULL ;
	char *pszExprTmpl = "(//. | //@* | //namespace::*)[%s]" ;
	char szXPathExpr[512] = {0} ;
	char *pXmlMem = "<?xml version=\"1.0\"?><Object Id=\"a123\">test123<Word>Wahaha</Word></Object>" ;
	int nXmlMemLen = strlen((char *)pXmlMem) ;

	pXml = xmlParseMemory(pXmlMem, nXmlMemLen) ;
	cTxt = xmlXPathNewContext(pXml) ;


	
	pOutBuff = xmlAllocOutputBuffer(NULL) ;
	
	sprintf(szXPathExpr, pszExprTmpl, "attribute::*") ;

	xpathObj = xmlXPathEval((xmlChar *)szXPathExpr, cTxt) ;
	
	xmlC14NDocSaveTo(pXml, xpathObj->nodesetval , 0, NULL, 0, pOutBuff) ;

	fprintf(stdout, "%s", pOutBuff->buffer->content) ;

	return 0 ;
}
	
	
								kltsai
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