diff --git a/reference/libxml/constants.xml b/reference/libxml/constants.xml
index bff3d30c99..249284afbc 100644
--- a/reference/libxml/constants.xml
+++ b/reference/libxml/constants.xml
@@ -54,6 +54,40 @@
+
+
+ LIBXML_HTML_NOIMPLIED
+ (integer)
+
+
+
+ Sets HTML_PARSE_NOIMPLIED flag, which turns off the
+ automatic adding of implied html/body... elements.
+
+
+
+ Only available in Libxml >= 2.7.7 (as of PHP >= 5.4.0)
+
+
+
+
+
+
+ LIBXML_HTML_NODEFDTD
+ (integer)
+
+
+
+ Sets HTML_PARSE_NODEFDTD flag, which prevents a default doctype
+ being added when one is not found.
+
+
+
+ Only available in Libxml >= 2.7.8 (as of PHP >= 5.4.0)
+
+
+
+
LIBXML_NOBLANKS
@@ -184,6 +218,22 @@
+
+
+ LIBXML_PEDANTIC
+ (integer)
+
+
+
+ Sets XML_PARSE_PEDANTIC flag, which enables pedentic error reporting.
+
+
+
+ Available as of PHP >= 5.4.0
+
+
+
+
LIBXML_XINCLUDE