/*
* raptor_rdfxmla_emit_literal:
* @serializer: #raptor_serializer object
* @element: XML Element
* @node: literal node
* @depth: depth into tree
*
* Emit a description of a literal using an XML Element
*
* Return value: non-0 on failure
**/
static int
raptor_rdfxmla_emit_literal(raptor_serializer *serializer,
raptor_xml_element *element,
raptor_abbrev_node* node,
int depth)
{
raptor_rdfxmla_context* context = (raptor_rdfxmla_context*)serializer->context;
raptor_xml_writer *xml_writer = context->xml_writer;
raptor_qname **attrs;
int attrs_count;
RAPTOR_DEBUG_ABBREV_NODE("Emitting literal node", node);
if(node->term->type != RAPTOR_TERM_TYPE_LITERAL)
return 1;
if(node->term->value.literal.language || node->term->value.literal.datatype) {
attrs_count = 0;
attrs = RAPTOR_CALLOC(raptor_qname**, 2, sizeof(raptor_qname*));
if(!attrs)
return 1;
if(node->term->value.literal.language) {
attrs[attrs_count] = raptor_new_qname(context->nstack,
(unsigned char*)"xml:lang",
node->term->value.literal.language);
if(!attrs[attrs_count])
goto attrs_oom;
attrs_count++;
}
if(node->term->value.literal.datatype) {
unsigned char *datatype_value;
datatype_value = raptor_uri_as_string(node->term->value.literal.datatype);
attrs[attrs_count] = raptor_new_qname_from_namespace_local_name(serializer->world,
context->rdf_nspace,
(const unsigned char*)"datatype",
datatype_value);
if(!attrs[attrs_count])
goto attrs_oom;
attrs_count++;
/* SJS Note: raptor_default_uri_as_string simply returns a
* pointer to the string. Hope this is also true of alternate
* uri implementations. */
/* RAPTOR_FREE(char*, datatype_value); */
}
raptor_xml_element_set_attributes(element, attrs, attrs_count);
}
/* start of an element */
void
raptor_sax2_start_element(void* user_data, const unsigned char *name,
const unsigned char **atts)
{
raptor_sax2* sax2=(raptor_sax2*)user_data;
raptor_qname* el_name;
unsigned char **xml_atts_copy=NULL;
size_t xml_atts_size=0;
int all_atts_count=0;
int ns_attributes_count=0;
raptor_qname** named_attrs=NULL;
raptor_xml_element* xml_element=NULL;
unsigned char *xml_language=NULL;
raptor_uri *xml_base=NULL;
if(sax2->failed)
return;
#ifdef RAPTOR_XML_EXPAT
#ifdef EXPAT_UTF8_BOM_CRASH
sax2->tokens_count++;
#endif
#endif
#ifdef RAPTOR_XML_LIBXML
if(atts) {
int i;
/* Do XML attribute value normalization */
for (i = 0; atts[i]; i+=2) {
unsigned char *value=(unsigned char*)atts[i+1];
unsigned char *src = value;
unsigned char *dst = xmlStrdup(value);
if(!dst) {
raptor_log_error_to_handlers(sax2->world,
sax2->error_handlers,
RAPTOR_LOG_LEVEL_FATAL,
sax2->locator, "Out of memory");
return;
}
atts[i+1]=dst;
while (*src == 0x20 || *src == 0x0d || *src == 0x0a || *src == 0x09)
src++;
while (*src) {
if (*src == 0x20 || *src == 0x0d || *src == 0x0a || *src == 0x09) {
while (*src == 0x20 || *src == 0x0d || *src == 0x0a || *src == 0x09)
src++;
if (*src)
*dst++ = 0x20;
} else {
*dst++ = *src++;
}
}
*dst = '\0';
xmlFree(value);
}
}
#endif
raptor_sax2_inc_depth(sax2);
if(atts) {
int i;
/* Save passed in XML attributes pointers so we can
* NULL the pointers when they get handled below (various atts[i]=NULL)
*/
for (i = 0; atts[i]; i++) ;
xml_atts_size=sizeof(unsigned char*) * i;
if(xml_atts_size) {
xml_atts_copy=(unsigned char**)RAPTOR_MALLOC(cstringpointer,xml_atts_size);
if(!xml_atts_copy)
goto fail;
memcpy(xml_atts_copy, atts, xml_atts_size);
}
/* XML attributes processing:
* xmlns* - XML namespaces (Namespaces in XML REC)
* Deleted and used to synthesise namespaces declarations
* xml:lang - XML language (XML REC)
* Deleted and optionally normalised to lowercase
* xml:base - XML Base (XML Base REC)
* Deleted and used to set the in-scope base URI for this XML element
*/
for (i = 0; atts[i]; i+= 2) {
all_atts_count++;
if(strncmp((char*)atts[i], "xml", 3)) {
/* count and skip non xml* attributes */
ns_attributes_count++;
continue;
}
/* synthesise the XML namespace events */
if(!memcmp((const char*)atts[i], "xmlns", 5)) {
const unsigned char *prefix=atts[i][5] ? &atts[i][6] : NULL;
const unsigned char *namespace_name=atts[i+1];
raptor_namespace* nspace;
nspace=raptor_new_namespace(&sax2->namespaces,
prefix, namespace_name,
raptor_sax2_get_depth(sax2));
if(nspace) {
raptor_namespaces_start_namespace(&sax2->namespaces, nspace);
if(sax2->namespace_handler)
(*sax2->namespace_handler)(sax2->user_data, nspace);
}
} else if(!strcmp((char*)atts[i], "xml:lang")) {
xml_language=(unsigned char*)RAPTOR_MALLOC(cstring, strlen((char*)atts[i+1])+1);
if(!xml_language) {
raptor_log_error_to_handlers(sax2->world,
sax2->error_handlers,
RAPTOR_LOG_LEVEL_FATAL,
sax2->locator, "Out of memory");
goto fail;
}
/* optionally normalize language to lowercase */
if(sax2->feature_normalize_language) {
unsigned char *from=(unsigned char*)atts[i+1];
unsigned char *to=xml_language;
while(*from) {
if(isupper(*from))
*to++ =tolower(*from++);
else
*to++ =*from++;
}
*to='\0';
} else
strcpy((char*)xml_language, (char*)atts[i+1]);
} else if(!strcmp((char*)atts[i], "xml:base")) {
raptor_uri* base_uri;
raptor_uri* xuri;
base_uri=raptor_sax2_inscope_base_uri(sax2);
xuri=raptor_new_uri_relative_to_base_v2(sax2->world, base_uri, atts[i+1]);
xml_base=raptor_new_uri_for_xmlbase_v2(sax2->world, xuri);
raptor_free_uri_v2(sax2->world, xuri);
}
/* delete all xml attributes whether processed above or not */
atts[i]=NULL;
}
}
/* Create new element structure */
el_name=raptor_new_qname(&sax2->namespaces, name, NULL,
(raptor_simple_message_handler)raptor_sax2_simple_error, sax2);
if(!el_name)
goto fail;
xml_element=raptor_new_xml_element(el_name, xml_language, xml_base);
if(!xml_element) {
raptor_free_qname(el_name);
goto fail;
}
/* xml_language,xml_base now owned by xml_element */
xml_language = NULL;
xml_base = NULL;
/* Turn string attributes into namespaced-attributes */
if(ns_attributes_count) {
int i;
int offset = 0;
/* Allocate new array to hold namespaced-attributes */
named_attrs=(raptor_qname**)RAPTOR_CALLOC(raptor_qname_array,
ns_attributes_count,
sizeof(raptor_qname*));
if(!named_attrs) {
raptor_log_error_to_handlers(sax2->world,
sax2->error_handlers,
RAPTOR_LOG_LEVEL_FATAL,
sax2->locator, "Out of memory");
goto fail;
}
for (i = 0; i < all_atts_count; i++) {
raptor_qname* attr;
/* Skip previously processed attributes */
if(!atts[i<<1])
continue;
/* namespace-name[i] stored in named_attrs[i] */
attr=raptor_new_qname(&sax2->namespaces,
atts[i<<1], atts[(i<<1)+1],
(raptor_simple_message_handler)raptor_sax2_simple_error, sax2);
if(!attr) { /* failed - tidy up and return */
int j;
for (j=0; j < i; j++)
RAPTOR_FREE(raptor_qname, named_attrs[j]);
RAPTOR_FREE(raptor_qname_array, named_attrs);
goto fail;
}
named_attrs[offset++]=attr;
}
} /* end if ns_attributes_count */
if(named_attrs)
raptor_xml_element_set_attributes(xml_element,
named_attrs, ns_attributes_count);
raptor_xml_element_push(sax2, xml_element);
if(sax2->start_element_handler)
sax2->start_element_handler(sax2->user_data, xml_element);
if(xml_atts_copy) {
/* Restore passed in XML attributes, free the copy */
memcpy((void*)atts, xml_atts_copy, xml_atts_size);
RAPTOR_FREE(cstringpointer, xml_atts_copy);
}
return;
fail:
if(xml_atts_copy)
RAPTOR_FREE(cstringpointer, xml_atts_copy);
if(xml_base)
raptor_free_uri_v2(sax2->world, xml_base);
if(xml_language)
RAPTOR_FREE(cstring, xml_language);
if(xml_element)
raptor_free_xml_element(xml_element);
}
int
main(int argc, char *argv[])
{
raptor_world *world;
const char *program = raptor_basename(argv[0]);
raptor_iostream *iostr;
raptor_namespace_stack *nstack;
raptor_namespace* foo_ns;
raptor_xml_writer* xml_writer;
raptor_uri* base_uri;
raptor_qname* el_name;
raptor_xml_element *element;
unsigned long offset;
raptor_qname **attrs;
raptor_uri* base_uri_copy = NULL;
/* for raptor_new_iostream_to_string */
void *string = NULL;
size_t string_len = 0;
world = raptor_new_world();
if(!world || raptor_world_open(world))
exit(1);
iostr = raptor_new_iostream_to_string(world, &string, &string_len, NULL);
if(!iostr) {
fprintf(stderr, "%s: Failed to create iostream to string\n", program);
exit(1);
}
nstack = raptor_new_namespaces(world, 1);
xml_writer = raptor_new_xml_writer(world, nstack, iostr);
if(!xml_writer) {
fprintf(stderr, "%s: Failed to create xml_writer to iostream\n", program);
exit(1);
}
base_uri = raptor_new_uri(world, base_uri_string);
foo_ns = raptor_new_namespace(nstack,
(const unsigned char*)"foo",
(const unsigned char*)"http://example.org/foo-ns#",
0);
el_name = raptor_new_qname_from_namespace_local_name(world,
foo_ns,
(const unsigned char*)"bar",
NULL);
base_uri_copy = base_uri ? raptor_uri_copy(base_uri) : NULL;
element = raptor_new_xml_element(el_name,
NULL, /* language */
base_uri_copy);
raptor_xml_writer_start_element(xml_writer, element);
raptor_xml_writer_cdata_counted(xml_writer, (const unsigned char*)"hello\n", 6);
raptor_xml_writer_comment_counted(xml_writer, (const unsigned char*)"comment", 7);
raptor_xml_writer_cdata(xml_writer, (const unsigned char*)"\n");
raptor_xml_writer_end_element(xml_writer, element);
raptor_free_xml_element(element);
raptor_xml_writer_cdata(xml_writer, (const unsigned char*)"\n");
el_name = raptor_new_qname(nstack,
(const unsigned char*)"blah",
NULL /* no attribute value - element */);
base_uri_copy = base_uri ? raptor_uri_copy(base_uri) : NULL;
element = raptor_new_xml_element(el_name,
NULL, /* language */
base_uri_copy);
attrs = (raptor_qname **)RAPTOR_CALLOC(qnamearray, 1, sizeof(raptor_qname*));
attrs[0] = raptor_new_qname(nstack,
(const unsigned char*)"a",
(const unsigned char*)"b" /* attribute value */);
raptor_xml_element_set_attributes(element, attrs, 1);
raptor_xml_writer_empty_element(xml_writer, element);
raptor_xml_writer_cdata(xml_writer, (const unsigned char*)"\n");
raptor_free_xml_writer(xml_writer);
raptor_free_xml_element(element);
raptor_free_namespace(foo_ns);
raptor_free_namespaces(nstack);
raptor_free_uri(base_uri);
offset = raptor_iostream_tell(iostr);
#if RAPTOR_DEBUG > 1
fprintf(stderr, "%s: Freeing iostream\n", program);
#endif
raptor_free_iostream(iostr);
if(offset != OUT_BYTES_COUNT) {
fprintf(stderr, "%s: I/O stream wrote %d bytes, expected %d\n", program,
(int)offset, (int)OUT_BYTES_COUNT);
fputs("[[", stderr);
(void)fwrite(string, 1, string_len, stderr);
fputs("]]\n", stderr);
return 1;
}
if(!string) {
fprintf(stderr, "%s: I/O stream failed to create a string\n", program);
return 1;
}
string_len = strlen((const char*)string);
if(string_len != offset) {
fprintf(stderr, "%s: I/O stream created a string length %d, expected %d\n", program, (int)string_len, (int)offset);
return 1;
}
#if RAPTOR_DEBUG > 1
fprintf(stderr, "%s: Made XML string of %d bytes\n", program, (int)string_len);
fputs("[[", stderr);
(void)fwrite(string, 1, string_len, stderr);
fputs("]]\n", stderr);
#endif
raptor_free_memory(string);
raptor_free_world(world);
/* keep gcc -Wall happy */
return(0);
}
/*
* rasqal_query_results_write_sparql_xml:
* @iostr: #raptor_iostream to write the query results to
* @results: #rasqal_query_results query results input
* @base_uri: #raptor_uri base URI of the output format
*
* Write the fourth version of the SPARQL XML query results format to an
* iostream in a format - INTERNAL.
*
* If the writing succeeds, the query results will be exhausted.
*
* Return value: non-0 on failure
**/
static int
rasqal_query_results_write_sparql_xml(rasqal_query_results_formatter* formatter,
raptor_iostream *iostr,
rasqal_query_results* results,
raptor_uri *base_uri)
{
int rc=1;
rasqal_world* world = rasqal_query_results_get_world(results);
raptor_xml_writer* xml_writer=NULL;
raptor_namespace *res_ns=NULL;
raptor_namespace_stack *nstack=NULL;
raptor_xml_element *sparql_element=NULL;
raptor_xml_element *results_element=NULL;
raptor_xml_element *result_element=NULL;
raptor_xml_element *element1=NULL;
raptor_xml_element *binding_element=NULL;
raptor_xml_element *variable_element=NULL;
raptor_qname **attrs=NULL;
int i;
if(!rasqal_query_results_is_bindings(results) &&
!rasqal_query_results_is_boolean(results)) {
rasqal_log_error_simple(world, RAPTOR_LOG_LEVEL_ERROR,
NULL,
"Can only write XML format v3 for variable binding and boolean results");
return 1;
}
nstack = raptor_new_namespaces(world->raptor_world_ptr, 1);
if(!nstack)
return 1;
xml_writer = raptor_new_xml_writer(world->raptor_world_ptr,
nstack,
iostr);
if(!xml_writer)
goto tidy;
res_ns=raptor_new_namespace(nstack,
NULL,
(const unsigned char*)"http://www.w3.org/2005/sparql-results#",
0);
if(!res_ns)
goto tidy;
sparql_element=raptor_new_xml_element_from_namespace_local_name(res_ns,
(const unsigned char*)"sparql",
NULL, base_uri);
if(!sparql_element)
goto tidy;
raptor_xml_writer_start_element(xml_writer, sparql_element);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)"\n", 1);
/* <head> */
element1=raptor_new_xml_element_from_namespace_local_name(res_ns,
(const unsigned char*)"head",
NULL, base_uri);
if(!element1)
goto tidy;
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)" ", 2);
raptor_xml_writer_start_element(xml_writer, element1);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)"\n", 1);
if(rasqal_query_results_is_bindings(results)) {
for(i=0; 1; i++) {
const unsigned char *name;
name=rasqal_query_results_get_binding_name(results, i);
if(!name)
break;
/* <variable name="x"/> */
variable_element=raptor_new_xml_element_from_namespace_local_name(res_ns,
(const unsigned char*)"variable",
NULL, base_uri);
if(!variable_element)
goto tidy;
attrs=(raptor_qname **)raptor_alloc_memory(sizeof(raptor_qname*));
if(!attrs)
goto tidy;
attrs[0] = raptor_new_qname_from_namespace_local_name(world->raptor_world_ptr,
res_ns,
(const unsigned char*)"name",
(const unsigned char*)name); /* attribute value */
if(!attrs[0]) {
raptor_free_memory((void*)attrs);
goto tidy;
}
raptor_xml_element_set_attributes(variable_element, attrs, 1);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)" ", 4);
raptor_xml_writer_empty_element(xml_writer, variable_element);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)"\n", 1);
raptor_free_xml_element(variable_element);
variable_element=NULL;
}
}
/* FIXME - could add <link> inside <head> */
/* </head> */
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)" ", 2);
raptor_xml_writer_end_element(xml_writer, element1);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)"\n", 1);
raptor_free_xml_element(element1);
element1=NULL;
/* Boolean Results */
if(rasqal_query_results_is_boolean(results)) {
result_element=raptor_new_xml_element_from_namespace_local_name(res_ns,
(const unsigned char*)"boolean",
NULL, base_uri);
if(!result_element)
goto tidy;
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)" ", 2);
raptor_xml_writer_start_element(xml_writer, result_element);
if(rasqal_query_results_get_boolean(results))
raptor_xml_writer_raw(xml_writer, RASQAL_XSD_BOOLEAN_TRUE);
else
raptor_xml_writer_raw(xml_writer, RASQAL_XSD_BOOLEAN_FALSE);
raptor_xml_writer_end_element(xml_writer, result_element);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)"\n", 1);
goto results3done;
}
/* Variable Binding Results */
/* <results> */
results_element=raptor_new_xml_element_from_namespace_local_name(res_ns,
(const unsigned char*)"results",
NULL, base_uri);
if(!results_element)
goto tidy;
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)" ", 2);
raptor_xml_writer_start_element(xml_writer, results_element);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)"\n", 1);
/* declare result element for later multiple use */
result_element=raptor_new_xml_element_from_namespace_local_name(res_ns,
(const unsigned char*)"result",
NULL, base_uri);
if(!result_element)
goto tidy;
while(!rasqal_query_results_finished(results)) {
/* <result> */
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)" ", 4);
raptor_xml_writer_start_element(xml_writer, result_element);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)"\n", 1);
for(i=0; i<rasqal_query_results_get_bindings_count(results); i++) {
const unsigned char *name=rasqal_query_results_get_binding_name(results, i);
rasqal_literal *l=rasqal_query_results_get_binding_value(results, i);
/* <binding> */
binding_element=raptor_new_xml_element_from_namespace_local_name(res_ns,
(const unsigned char*)"binding",
NULL, base_uri);
if(!binding_element)
goto tidy;
attrs=(raptor_qname **)raptor_alloc_memory(sizeof(raptor_qname*));
if(!attrs)
goto tidy;
attrs[0] = raptor_new_qname_from_namespace_local_name(world->raptor_world_ptr,
res_ns,
(const unsigned char*)"name",
name);
if(!attrs[0]) {
raptor_free_memory((void*)attrs);
goto tidy;
}
raptor_xml_element_set_attributes(binding_element, attrs, 1);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)" ", 6);
raptor_xml_writer_start_element(xml_writer, binding_element);
if(!l) {
element1=raptor_new_xml_element_from_namespace_local_name(res_ns,
(const unsigned char*)"unbound",
NULL, base_uri);
if(!element1)
goto tidy;
raptor_xml_writer_empty_element(xml_writer, element1);
} else switch(l->type) {
case RASQAL_LITERAL_URI:
element1=raptor_new_xml_element_from_namespace_local_name(res_ns,
(const unsigned char*)"uri",
NULL, base_uri);
if(!element1)
goto tidy;
raptor_xml_writer_start_element(xml_writer, element1);
raptor_xml_writer_cdata(xml_writer, (const unsigned char*)raptor_uri_as_string(l->value.uri));
raptor_xml_writer_end_element(xml_writer, element1);
break;
case RASQAL_LITERAL_BLANK:
element1=raptor_new_xml_element_from_namespace_local_name(res_ns,
(const unsigned char*)"bnode",
NULL, base_uri);
if(!element1)
goto tidy;
raptor_xml_writer_start_element(xml_writer, element1);
raptor_xml_writer_cdata(xml_writer, (const unsigned char*)l->string);
raptor_xml_writer_end_element(xml_writer, element1);
break;
case RASQAL_LITERAL_STRING:
case RASQAL_LITERAL_UDT:
element1=raptor_new_xml_element_from_namespace_local_name(res_ns,
(const unsigned char*)"literal",
NULL, base_uri);
if(!element1)
goto tidy;
if(l->language || l->datatype) {
attrs=(raptor_qname **)raptor_alloc_memory(sizeof(raptor_qname*));
if(!attrs)
goto tidy;
if(l->language)
attrs[0]=raptor_new_qname(nstack,
(const unsigned char*)"xml:lang",
(const unsigned char*)l->language);
else
attrs[0] = raptor_new_qname_from_namespace_local_name(world->raptor_world_ptr,
res_ns,
(const unsigned char*)"datatype",
(const unsigned char*)raptor_uri_as_string(l->datatype));
if(!attrs[0]) {
raptor_free_memory((void*)attrs);
goto tidy;
}
raptor_xml_element_set_attributes(element1, attrs, 1);
}
raptor_xml_writer_start_element(xml_writer, element1);
raptor_xml_writer_cdata_counted(xml_writer,
(const unsigned char*)l->string,
l->string_len);
raptor_xml_writer_end_element(xml_writer, element1);
break;
case RASQAL_LITERAL_PATTERN:
case RASQAL_LITERAL_QNAME:
case RASQAL_LITERAL_INTEGER:
case RASQAL_LITERAL_XSD_STRING:
case RASQAL_LITERAL_BOOLEAN:
case RASQAL_LITERAL_DOUBLE:
case RASQAL_LITERAL_FLOAT:
case RASQAL_LITERAL_VARIABLE:
case RASQAL_LITERAL_DECIMAL:
case RASQAL_LITERAL_DATETIME:
case RASQAL_LITERAL_INTEGER_SUBTYPE:
case RASQAL_LITERAL_UNKNOWN:
default:
rasqal_log_error_simple(world, RAPTOR_LOG_LEVEL_ERROR,
NULL,
"Cannot turn literal type %d into XML",
l->type);
goto tidy;
}
if(element1) {
raptor_free_xml_element(element1);
element1=NULL;
}
/* </binding> */
raptor_xml_writer_end_element(xml_writer, binding_element);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)"\n", 1);
raptor_free_xml_element(binding_element);
binding_element=NULL;
}
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)" ", 4);
raptor_xml_writer_end_element(xml_writer, result_element);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)"\n", 1);
rasqal_query_results_next(results);
}
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)" ", 2);
raptor_xml_writer_end_element(xml_writer, results_element);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)"\n", 1);
results3done:
rc=0;
raptor_xml_writer_end_element(xml_writer, sparql_element);
raptor_xml_writer_raw_counted(xml_writer, (const unsigned char*)"\n", 1);
tidy:
if(element1)
raptor_free_xml_element(element1);
if(variable_element)
raptor_free_xml_element(variable_element);
if(binding_element)
raptor_free_xml_element(binding_element);
if(result_element)
raptor_free_xml_element(result_element);
if(results_element)
raptor_free_xml_element(results_element);
if(sparql_element)
raptor_free_xml_element(sparql_element);
if(res_ns)
raptor_free_namespace(res_ns);
if(xml_writer)
raptor_free_xml_writer(xml_writer);
if(nstack)
raptor_free_namespaces(nstack);
return rc;
}