diff --git a/README b/README
index 9c7ff7f..15fbf6c 100644
--- a/README
+++ b/README
@@ -2,6 +2,14 @@
 
       ./build.sh all convmap
 
+To check for valid XML:
+
+      ./build.sh validate-xml
+
+To check the resulting HTML:
+
+      ./build.sh validate-xhtml
+
 For 2.0, use:
 
       ./build.sh all