diff --git a/result/XInclude/ns1.xml.rdr b/result/XInclude/ns1.xml.rdr
index f23702f57..9a3a5e76a 100644
--- a/result/XInclude/ns1.xml.rdr
+++ b/result/XInclude/ns1.xml.rdr
@@ -1,7 +1,7 @@
 0 1 doc 0 0
 1 14 #text 0 1 
     
-1 1 ns:elem 1 0
+1 1 xi:include 1 0
 1 14 #text 0 1 
     
 1 1 elem 0 0
diff --git a/valid.c b/valid.c
index 5ee391c04..8e596f1db 100644
--- a/valid.c
+++ b/valid.c
@@ -479,6 +479,35 @@ nodeVPop(xmlValidCtxtPtr ctxt)
     return (ret);
 }
 
+/**
+ * xmlValidNormalizeString:
+ * @str: a string
+ *
+ * Normalize a string in-place.
+ */
+static void
+xmlValidNormalizeString(xmlChar *str) {
+    xmlChar *dst;
+    const xmlChar *src;
+
+    if (str == NULL)
+        return;
+    src = str;
+    dst = str;
+
+    while (*src == 0x20) src++;
+    while (*src != 0) {
+	if (*src == 0x20) {
+	    while (*src == 0x20) src++;
+	    if (*src != 0)
+		*dst++ = 0x20;
+	} else {
+	    *dst++ = *src++;
+	}
+    }
+    *dst = 0;
+}
+
 #ifdef DEBUG_VALID_ALGO
 static void
 xmlValidPrintNode(xmlNodePtr cur) {
@@ -2607,6 +2636,24 @@ xmlDumpNotationTable(xmlBufferPtr buf, xmlNotationTablePtr table) {
 	    (xmlDictOwns(dict, (const xmlChar *)(str)) == 0)))	\
 	    xmlFree((char *)(str));
 
+static int
+xmlIsStreaming(xmlValidCtxtPtr ctxt) {
+    xmlParserCtxtPtr pctxt;
+
+    if (ctxt == NULL)
+        return(0);
+    /*
+     * These magic values are also abused to detect whether we're validating
+     * while parsing a document. In this case, userData points to the parser
+     * context.
+     */
+    if ((ctxt->finishDtd != XML_CTXT_FINISH_DTD_0) &&
+        (ctxt->finishDtd != XML_CTXT_FINISH_DTD_1))
+        return(0);
+    pctxt = ctxt->userData;
+    return(pctxt->parseMode == XML_PARSE_READER);
+}
+
 /**
  * xmlFreeID:
  * @not:  A id
@@ -2650,7 +2697,7 @@ xmlAddID(xmlValidCtxtPtr ctxt, xmlDocPtr doc, const xmlChar *value,
     if (doc == NULL) {
 	return(NULL);
     }
-    if (value == NULL) {
+    if ((value == NULL) || (value[0] == 0)) {
 	return(NULL);
     }
     if (attr == NULL) {
@@ -2681,7 +2728,7 @@ xmlAddID(xmlValidCtxtPtr ctxt, xmlDocPtr doc, const xmlChar *value,
      */
     ret->value = xmlStrdup(value);
     ret->doc = doc;
-    if ((ctxt != NULL) && (ctxt->vstateNr != 0)) {
+    if (xmlIsStreaming(ctxt)) {
 	/*
 	 * Operating in streaming mode, attr is gonna disappear
 	 */
@@ -2820,6 +2867,7 @@ xmlRemoveID(xmlDocPtr doc, xmlAttrPtr attr) {
     ID = xmlNodeListGetString(doc, attr->children, 1);
     if (ID == NULL)
         return(-1);
+    xmlValidNormalizeString(ID);
 
     id = xmlHashLookup(table, ID);
     if (id == NULL || id->attr != attr) {
@@ -3009,7 +3057,7 @@ xmlAddRef(xmlValidCtxtPtr ctxt, xmlDocPtr doc, const xmlChar *value,
      * fill the structure.
      */
     ret->value = xmlStrdup(value);
-    if ((ctxt != NULL) && (ctxt->vstateNr != 0)) {
+    if (xmlIsStreaming(ctxt)) {
 	/*
 	 * Operating in streaming mode, attr is gonna disappear
 	 */
@@ -4028,8 +4076,7 @@ xmlValidateAttributeValue2(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
 xmlChar *
 xmlValidCtxtNormalizeAttributeValue(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
 	     xmlNodePtr elem, const xmlChar *name, const xmlChar *value) {
-    xmlChar *ret, *dst;
-    const xmlChar *src;
+    xmlChar *ret;
     xmlAttributePtr attrDecl = NULL;
     int extsubset = 0;
 
@@ -4070,19 +4117,7 @@ xmlValidCtxtNormalizeAttributeValue(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
     ret = xmlStrdup(value);
     if (ret == NULL)
 	return(NULL);
-    src = value;
-    dst = ret;
-    while (*src == 0x20) src++;
-    while (*src != 0) {
-	if (*src == 0x20) {
-	    while (*src == 0x20) src++;
-	    if (*src != 0)
-		*dst++ = 0x20;
-	} else {
-	    *dst++ = *src++;
-	}
-    }
-    *dst = 0;
+    xmlValidNormalizeString(ret);
     if ((doc->standalone) && (extsubset == 1) && (!xmlStrEqual(value, ret))) {
 	xmlErrValidNode(ctxt, elem, XML_DTD_NOT_STANDALONE,
 "standalone: %s on %s value had to be normalized based on external subset declaration\n",
@@ -4114,8 +4149,7 @@ xmlValidCtxtNormalizeAttributeValue(xmlValidCtxtPtr ctxt, xmlDocPtr doc,
 xmlChar *
 xmlValidNormalizeAttributeValue(xmlDocPtr doc, xmlNodePtr elem,
 			        const xmlChar *name, const xmlChar *value) {
-    xmlChar *ret, *dst;
-    const xmlChar *src;
+    xmlChar *ret;
     xmlAttributePtr attrDecl = NULL;
 
     if (doc == NULL) return(NULL);
@@ -4145,19 +4179,7 @@ xmlValidNormalizeAttributeValue(xmlDocPtr doc, xmlNodePtr elem,
     ret = xmlStrdup(value);
     if (ret == NULL)
 	return(NULL);
-    src = value;
-    dst = ret;
-    while (*src == 0x20) src++;
-    while (*src != 0) {
-	if (*src == 0x20) {
-	    while (*src == 0x20) src++;
-	    if (*src != 0)
-		*dst++ = 0x20;
-	} else {
-	    *dst++ = *src++;
-	}
-    }
-    *dst = 0;
+    xmlValidNormalizeString(ret);
     return(ret);
 }