This is the 2.0.0-beta, lots and lots and lots of changes
Have a look at http://xmlsoft.org/upgrade.html

Daniel
diff --git a/configure.in b/configure.in
index d055507..55d67a9 100644
--- a/configure.in
+++ b/configure.in
@@ -3,9 +3,9 @@
 AC_INIT(entities.h)
 AM_CONFIG_HEADER(config.h)
 
-LIBXML_MAJOR_VERSION=1
-LIBXML_MINOR_VERSION=8
-LIBXML_MICRO_VERSION=7
+LIBXML_MAJOR_VERSION=2
+LIBXML_MINOR_VERSION=0
+LIBXML_MICRO_VERSION=0
 LIBXML_VERSION=$LIBXML_MAJOR_VERSION.$LIBXML_MINOR_VERSION.$LIBXML_MICRO_VERSION
 LIBXML_VERSION_INFO=`expr $LIBXML_MAJOR_VERSION + $LIBXML_MINOR_VERSION`:$LIBXML_MICRO_VERSION:$LIBXML_MINOR_VERSION
 
@@ -15,7 +15,7 @@
 AC_SUBST(LIBXML_VERSION)
 AC_SUBST(LIBXML_VERSION_INFO)
 
-VERSION=$LIBXML_VERSION
+VERSION=$LIBXML_VERSION-beta
 
 AM_INIT_AUTOMAKE(libxml, $VERSION)