diff --git a/functions/ovrimos.xml b/functions/ovrimos.xml
index 9034751466..01f0bdfd5b 100644
--- a/functions/ovrimos.xml
+++ b/functions/ovrimos.xml
@@ -166,7 +166,7 @@ if ($conn != 0) {
      are to be retrieved from long datatypes (long varchar and long
      varbinary). Default is zero. Regardless of its taking a result_id
      as an argument, it currently sets this parameter for all result
-     sets. Returns true.
+     sets. Returns <literal>TRUE</literal>.
     </para>
    </refsect1>
   </refentry>
@@ -234,7 +234,7 @@ if ($conn!=0) {
     <title>Description</title>
     <funcsynopsis>
      <funcprototype>
-      <funcdef>int <function>ovrimos_execute</function></funcdef>
+      <funcdef>boolean <function>ovrimos_execute</function></funcdef>
       <paramdef>int <parameter>result_id</parameter></paramdef>
       <paramdef>array 
        <parameter><optional>parameters_array</optional></parameter>
@@ -247,7 +247,8 @@ if ($conn!=0) {
     </para>
     <para>
      <function>ovrimos_execute</function> executes a prepared
-     statement. Returns true or false. If the prepared statement
+     statement. Returns <literal>TRUE</literal> or <literal>FALSE</literal>.
+     If the prepared statement
      contained parameters (question marks in the statement), the
      correct number of parameters should be passed in an array. Notice
      that I don't follow the PHP convention of placing just the name
@@ -317,7 +318,7 @@ if ($conn!=0) {
     <title>Description</title>
     <funcsynopsis>
      <funcprototype>
-      <funcdef>int <function>ovrimos_fetch_into</function></funcdef>
+      <funcdef>boolean <function>ovrimos_fetch_into</function></funcdef>
       <paramdef>int <parameter>result_id</parameter></paramdef>
       <paramdef>array <parameter>result_array</parameter></paramdef>
       <paramdef>string 
@@ -343,7 +344,7 @@ if ($conn!=0) {
      and absolute position from the start (essentially equivalent to
      'first' but needs 'rownumber'). Case is not
      significant. 'Rownumber' is optional except for absolute
-     positioning. Returns true or false.
+     positioning. Returns <literal>TRUE</literal> or <literal>FALSE</literal>.
     </para>
     <para>
      <example>
@@ -389,7 +390,7 @@ if ($conn!=0) {
     <title>Description</title>
     <funcsynopsis>
      <funcprototype>
-      <funcdef>int <function>ovrimos_fetch_row</function></funcdef>
+      <funcdef>boolean <function>ovrimos_fetch_row</function></funcdef>
       <paramdef>int <parameter>result_id</parameter></paramdef>
       <paramdef>int 
        <parameter><optional>how</optional></parameter>
@@ -406,7 +407,7 @@ if ($conn!=0) {
     <para>
      <function>ovrimos_fetch_row</function> fetches a row from the
      result set. Column values should be retrieved with other
-     calls. Returns true or false.
+     calls. Returns <literal>TRUE</literal> or <literal>FALSE</literal>.
     </para>
     <para>
      <example>
@@ -481,7 +482,7 @@ if ($conn != 0) {
     <title>Description</title>
     <funcsynopsis>
      <funcprototype>
-      <funcdef>int <function>ovrimos_result_all</function></funcdef>
+      <funcdef>boolean <function>ovrimos_result_all</function></funcdef>
       <paramdef>int <parameter>result_id</parameter></paramdef>
       <paramdef>string 
        <parameter><optional>format</optional></parameter>
@@ -494,7 +495,8 @@ if ($conn != 0) {
     </para>
     <para>
      <function>ovrimos_result_all</function> prints the whole result
-     set as an HTML table. Returns true or false.
+     set as an HTML table. Returns <literal>TRUE</literal> or 
+     <literal>FALSE</literal>.
     </para>
     <para>
      <example>
@@ -696,7 +698,8 @@ if ($conn != 0) {
     </funcsynopsis>
     <para>
      <function>ovrimos_field_len</function> is used to get the length
-     of the output column.
+     of the output column with number <parameter>field_number</parameter>,
+     in result <parameter>result_id</parameter>.
     </para>
     <para>
      <function>ovrimos_field_len</function> returns the length of the
@@ -741,7 +744,7 @@ if ($conn != 0) {
     <title>Description</title>
     <funcsynopsis>
      <funcprototype>
-      <funcdef>int <function>ovrimos_free_result</function></funcdef>
+      <funcdef>boolean <function>ovrimos_free_result</function></funcdef>
       <paramdef>int <parameter>result_id</parameter></paramdef>
      </funcprototype>
     </funcsynopsis>
@@ -751,7 +754,7 @@ if ($conn != 0) {
     </para>
     <para>
      <function>ovrimos_free_result</function> frees the specified
-     result_id. Returns true.
+     result_id <parameter>result_id</parameter>. Returns <literal>TRUE</literal>.
     </para>
     </refsect1>
   </refentry>