diff --git a/functions/bc.xml b/functions/bc.xml
index 3560003979..eb5d2f02c9 100644
--- a/functions/bc.xml
+++ b/functions/bc.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.19 $ -->
+<!-- $Revision: 1.20 $ -->
  <reference id="ref.bc">
   <title>BCMath Arbitrary Precision Mathematics Functions</title>
   <titleabbrev>BC math</titleabbrev>
@@ -33,16 +33,16 @@
     <funcsynopsis>
      <funcprototype>
       <funcdef>string <function>bcadd</function></funcdef>
-      <paramdef>string <parameter>left operand</parameter></paramdef>
-      <paramdef>string <parameter>right operand</parameter></paramdef>
+      <paramdef>string <parameter>left_operand</parameter></paramdef>
+      <paramdef>string <parameter>right_operand</parameter></paramdef>
       <paramdef>int 
        <parameter><optional>scale</optional></parameter>
       </paramdef>
      </funcprototype>
     </funcsynopsis>
     <para>
-     Adds the <parameter>left operand</parameter> to the
-     <parameter>right operand</parameter> and returns the sum in a
+     Adds the <parameter>left_operand</parameter> to the
+     <parameter>right_operand</parameter> and returns the sum in a
      string.  The optional <parameter>scale</parameter> parameter is
      used to set the number of digits after the decimal place in the
      result.
@@ -63,23 +63,23 @@
     <funcsynopsis>
      <funcprototype>
       <funcdef>int <function>bccomp</function></funcdef>
-      <paramdef>string <parameter>left operand</parameter></paramdef>
-      <paramdef>string <parameter>right operand</parameter></paramdef>
+      <paramdef>string <parameter>left_operand</parameter></paramdef>
+      <paramdef>string <parameter>right_operand</parameter></paramdef>
       <paramdef>int 
        <parameter><optional>scale</optional></parameter>
       </paramdef>
      </funcprototype>
     </funcsynopsis>
     <para>
-     Compares the <parameter>left operand</parameter> to the
-     <parameter>right operand</parameter> and returns the result as an
+     Compares the <parameter>left_operand</parameter> to the
+     <parameter>right_operand</parameter> and returns the result as an
      integer.  The optional <parameter>scale</parameter> parameter is
      used to set the number of digits after the decimal place which
      will be used in the comparison.  The return value is 0 if the two
-     operands are equal.  If the <parameter>left operand</parameter>
-     is larger than the <parameter>right operand</parameter> the
-     return value is +1 and if the <parameter>left operand</parameter>
-     is less than the <parameter>right operand</parameter> the return
+     operands are equal.  If the <parameter>left_operand</parameter>
+     is larger than the <parameter>right_operand</parameter> the
+     return value is +1 and if the <parameter>left_operand</parameter>
+     is less than the <parameter>right_operand</parameter> the return
      value is -1.
     </para>
    </refsect1>
@@ -95,16 +95,16 @@
     <funcsynopsis>
      <funcprototype>
       <funcdef>string <function>bcdiv</function></funcdef>
-      <paramdef>string <parameter>left operand</parameter></paramdef>
-      <paramdef>string <parameter>right operand</parameter></paramdef>
+      <paramdef>string <parameter>left_operand</parameter></paramdef>
+      <paramdef>string <parameter>right_operand</parameter></paramdef>
       <paramdef>int 
        <parameter><optional>scale</optional></parameter>
       </paramdef>
      </funcprototype>
     </funcsynopsis>
     <para>
-     Divides the <parameter>left operand</parameter> by the
-     <parameter>right operand</parameter> and returns the result.  The
+     Divides the <parameter>left_operand</parameter> by the
+     <parameter>right_operand</parameter> and returns the result.  The
      optional <parameter>scale</parameter> sets the number of digits
      after the decimal place in the result.
     </para>
@@ -126,12 +126,12 @@
     <funcsynopsis>
      <funcprototype>
       <funcdef>string <function>bcmod</function></funcdef>
-      <paramdef>string <parameter>left operand</parameter></paramdef>
+      <paramdef>string <parameter>left_operand</parameter></paramdef>
       <paramdef>string <parameter>modulus</parameter></paramdef>
      </funcprototype>
     </funcsynopsis>
     <para>
-     Get the modulus of the <parameter>left operand</parameter> using
+     Get the modulus of the <parameter>left_operand</parameter> using
      <parameter>modulus</parameter>.
     </para>
     <para>
@@ -150,16 +150,16 @@
     <funcsynopsis>
      <funcprototype>
       <funcdef>string <function>bcmul</function></funcdef>
-      <paramdef>string <parameter>left operand</parameter></paramdef>
-      <paramdef>string <parameter>right operand</parameter></paramdef>
+      <paramdef>string <parameter>left_operand</parameter></paramdef>
+      <paramdef>string <parameter>right_operand</parameter></paramdef>
       <paramdef>int 
        <parameter><optional>scale</optional></parameter>
       </paramdef>
      </funcprototype>
     </funcsynopsis>
     <para>
-     Multiply the <parameter>left operand</parameter> by the
-     <parameter>right operand</parameter> and returns the result.  The
+     Multiply the <parameter>left_operand</parameter> by the
+     <parameter>right_operand</parameter> and returns the result.  The
      optional <parameter>scale</parameter> sets the number of digits
      after the decimal place in the result.
     </para>
@@ -264,16 +264,16 @@
     <funcsynopsis>
      <funcprototype>
       <funcdef>string <function>bcsub</function></funcdef>
-      <paramdef>string <parameter>left operand</parameter></paramdef>
-      <paramdef>string <parameter>right operand</parameter></paramdef>
+      <paramdef>string <parameter>left_operand</parameter></paramdef>
+      <paramdef>string <parameter>right_operand</parameter></paramdef>
       <paramdef>int 
        <parameter><optional>scale</optional></parameter>
       </paramdef>
      </funcprototype>
     </funcsynopsis>
     <para>
-     Subtracts the <parameter>right operand</parameter> from the
-     <parameter>left operand</parameter> and returns the result in a
+     Subtracts the <parameter>right_operand</parameter> from the
+     <parameter>left_operand</parameter> and returns the result in a
      string.  The optional <parameter>scale</parameter> parameter is
      used to set the number of digits after the decimal place in the
      result.