diff --git a/language/types.xml b/language/types.xml
index a4696615f0..9b1916da26 100644
--- a/language/types.xml
+++ b/language/types.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.92 $ -->
+<!-- $Revision: 1.93 $ -->
  <chapter id="language.types">
   <title>Types</title>
 
@@ -525,6 +525,17 @@ EXPONENT_DNUM	(({LNUM}|{DNUM})[eE][+-]?{LNUM})
      or <link linkend="ref.gmp">gmp</link> functions instead.
     </para>
    </warning>
+
+   <!-- TODO: add more info -->
+   <sect2 id="language.types.float.casting">
+    <title>Converting to float</title>
+    
+    <para>
+     For information on when and how strings are converted to floats,
+     see the section titled <link linkend="language.types.string.conversion">String
+     conversion to numbers</link>.
+    </para>
+   </sect2>
   </sect1>
 
   <sect1 id="language.types.string">
@@ -1089,6 +1100,12 @@ echo "\$foo==$foo; type is " . gettype ($foo) . "<br />\n";
       </programlisting>
      </informalexample>
     </para>
+    <para>
+     Do not expect to get the code of one character by converting it
+     to integer (as you would do in C for example). Use the functions
+     <function>ord</function> and <function>chr</function> to convert
+     between charcodes and characters.
+    </para>
 
    </sect2>
   </sect1><!-- end string -->