xpath

#define     XPATH_UNDEFINED

#define     XPATH_NODESET

#define     XPATH_BOOLEAN

#define     XPATH_NUMBER

#define     XPATH_STRING

#define     XPATH_USERS

int         (*xmlXPathConvertFunc)          (xmlXPathObjectPtr obj,
                                             int type);

void        (*xmlXPathEvalFunc)             (xmlXPathParserContextPtr ctxt,
                                             int nargs);

xmlXPathObjectPtr (*xmlXPathAxisFunc)       (xmlXPathParserContextPtr ctxt,
                                             xmlXPathObjectPtr cur);

void        (*xmlXPathFunction)             (xmlXPathParserContextPtr ctxt,
                                             int nargs);

xmlXPathContextPtr xmlXPathNewContext       (xmlDocPtr doc);

void        xmlXPathFreeContext             (xmlXPathContextPtr ctxt);

xmlXPathObjectPtr xmlXPathEval              (const xmlChar *str,
                                             xmlXPathContextPtr ctxt);

void        xmlXPathFreeObject              (xmlXPathObjectPtr obj);

xmlXPathObjectPtr xmlXPathEvalExpression    (const xmlChar *str,
                                             xmlXPathContextPtr ctxt);