fixing a number of issues raised by xml:id but more generally related to

* SAX2.c tree.c valid.c: fixing a number of issues raised by xml:id
  but more generally related to attributes and ID handling, fixes
  #314358 among other things
Daniel

1 files changed, 5 insertions, 1 deletions

diff --git a/valid.c b/valid.c
index c0141ff1..3ee5630c 100644
--- a/valid.c
+++ b/valid.c
@@ -2703,8 +2703,12 @@ xmlFreeIDTable(xmlIDTablePtr table) {
  */
 int
 xmlIsID(xmlDocPtr doc, xmlNodePtr elem, xmlAttrPtr attr) {
+    if ((attr == NULL) || (attr->name == NULL)) return(0);
+    if ((attr->ns != NULL) && (attr->ns->prefix != NULL) &&
+        (!strcmp((char *) attr->name, "id")) &&
+        (!strcmp((char *) attr->ns->prefix, "xml")))
+	return(1);
     if (doc == NULL) return(0);
-    if (attr == NULL) return(0);
     if ((doc->intSubset == NULL) && (doc->extSubset == NULL)) {
 	return(0);
     } else if (doc->type == XML_HTML_DOCUMENT_NODE) {