diff --git a/reference/rrd/functions/rrd-fetch.xml b/reference/rrd/functions/rrd-fetch.xml
index 503b92dcb2..f5488c8243 100644
--- a/reference/rrd/functions/rrd-fetch.xml
+++ b/reference/rrd/functions/rrd-fetch.xml
@@ -28,7 +28,7 @@
     <term><parameter>filename</parameter></term>
     <listitem>
      <para>
-      Filename of rrd database file.
+      RRD database file name.
      </para>
     </listitem>
    </varlistentry>
diff --git a/reference/rrd/functions/rrd-first.xml b/reference/rrd/functions/rrd-first.xml
index a63ba73881..213ebfa5f8 100644
--- a/reference/rrd/functions/rrd-first.xml
+++ b/reference/rrd/functions/rrd-first.xml
@@ -26,7 +26,7 @@
     <term><parameter>file</parameter></term>
     <listitem>
      <para>
-     	Filename for a rrd file.
+      RRD database file name.
      </para>
     </listitem>
    </varlistentry>
@@ -34,7 +34,7 @@
     <term><parameter>raaindex</parameter></term>
     <listitem>
      <para>
-     	The index number of the RRA that is to be examined. Default value is 0.
+      The index number of the RRA that is to be examined. Default value is 0.
      </para>
     </listitem>
    </varlistentry>
diff --git a/reference/rrd/functions/rrd-graph.xml b/reference/rrd/functions/rrd-graph.xml
index f89a244d97..5e4838a18e 100644
--- a/reference/rrd/functions/rrd-graph.xml
+++ b/reference/rrd/functions/rrd-graph.xml
@@ -15,7 +15,7 @@
    <methodparam><type>array</type><parameter>options</parameter></methodparam>
   </methodsynopsis>
   <para>
-	 Creates image for a particular data from RRD file.
+   Creates image for a particular data from RRD file.
   </para>
  </refsect1>
 
@@ -26,7 +26,7 @@
     <term><parameter>filename</parameter></term>
     <listitem>
      <para>
-      Filename for the RRD file.
+      RRD database file name.
      </para>
     </listitem>
    </varlistentry>
@@ -34,7 +34,7 @@
     <term><parameter>options</parameter></term>
     <listitem>
      <para>
-      Options for rrd graph generating. See man page of rrd graph for all
+      Options for generating image. See man page of rrd graph for all
       possible options. All options (data definitions, variable defintions, etc.)
       are allowed.
      </para>
@@ -46,8 +46,8 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-	Array with information about generated image is returned, &false; if error
-  occurs.
+   Array with information about generated image is returned, &false; when error
+   occurs.
   </para>
  </refsect1>
 </refentry>
diff --git a/reference/rrd/functions/rrd-info.xml b/reference/rrd/functions/rrd-info.xml
index 5e674fdbc9..a87e5989b6 100644
--- a/reference/rrd/functions/rrd-info.xml
+++ b/reference/rrd/functions/rrd-info.xml
@@ -25,7 +25,7 @@
     <term><parameter>file</parameter></term>
     <listitem>
      <para>
-      Filename for the RRD database file.
+      RRD database file name.
      </para>
     </listitem>
    </varlistentry>
diff --git a/reference/rrd/functions/rrd-last.xml b/reference/rrd/functions/rrd-last.xml
index 23cf0966b3..6c3fb7c615 100644
--- a/reference/rrd/functions/rrd-last.xml
+++ b/reference/rrd/functions/rrd-last.xml
@@ -25,7 +25,7 @@
     <term><parameter>filename</parameter></term>
     <listitem>
      <para>
-	  Filename for the RRD database file.
+	  RRD database file name.
      </para>
     </listitem>
    </varlistentry>
@@ -35,11 +35,10 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-  Integer as unix timestamp of the most recent data of the RRD database.
+   Integer as unix timestamp of the most recent data from the RRD database.
   </para>
  </refsect1>
 
-
 </refentry>
 
 <!-- Keep this comment at the end of the file
diff --git a/reference/rrd/functions/rrd-lastupdate.xml b/reference/rrd/functions/rrd-lastupdate.xml
index 28f4b87a89..f26aeb4a52 100644
--- a/reference/rrd/functions/rrd-lastupdate.xml
+++ b/reference/rrd/functions/rrd-lastupdate.xml
@@ -26,7 +26,7 @@
     <term><parameter>file</parameter></term>
     <listitem>
      <para>
-	  Filename for the RRD database file.
+	  RRD database file name.
      </para>
     </listitem>
    </varlistentry>
@@ -36,7 +36,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Array of information about last update, &false; if error occurs.
+   Array of information about last update, &false; when error occurs.
   </para>
  </refsect1>
 </refentry>
diff --git a/reference/rrd/functions/rrd-restore.xml b/reference/rrd/functions/rrd-restore.xml
index af622c2b5a..f1e882d7da 100644
--- a/reference/rrd/functions/rrd-restore.xml
+++ b/reference/rrd/functions/rrd-restore.xml
@@ -4,7 +4,7 @@
 <refentry xml:id="function.rrd-restore" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>rrd_restore</refname>
-  <refpurpose>Restore the RRD file from XML dump.</refpurpose>
+  <refpurpose>Restores the RRD file from XML dump.</refpurpose>
  </refnamediv>
 
  <refsect1 role="description">
@@ -27,7 +27,7 @@
     <term><parameter>xml_file</parameter></term>
     <listitem>
      <para>
-	  XML filename for the dump of original RRD database file.
+	  XML filename with the dump of the original RRD database file.
      </para>
     </listitem>
    </varlistentry>
@@ -35,7 +35,7 @@
     <term><parameter>rrd_file</parameter></term>
     <listitem>
      <para>
-      Filename for the RRD file, which will be restored.
+      Restored RRD database file name.
      </para>
     </listitem>
    </varlistentry>
diff --git a/reference/rrd/functions/rrd-tune.xml b/reference/rrd/functions/rrd-tune.xml
index c22df68c09..e2b5eb18f5 100644
--- a/reference/rrd/functions/rrd-tune.xml
+++ b/reference/rrd/functions/rrd-tune.xml
@@ -4,7 +4,7 @@
 <refentry xml:id="function.rrd-tune" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>rrd_tune</refname>
-  <refpurpose>Tunes some RRD file header options.</refpurpose>
+  <refpurpose>Tunes some RRD database file header options.</refpurpose>
  </refnamediv>
 
  <refsect1 role="description">
@@ -15,7 +15,7 @@
    <methodparam><type>array</type><parameter>options</parameter></methodparam>
   </methodsynopsis>
   <para>
-   Change some options in the RRD header file. E.g. renames the source for the
+   Change some options in the RRD dabase header file. E.g. renames the source for the
    the data etc.
   </para>
  </refsect1>
@@ -27,7 +27,7 @@
     <term><parameter>filename</parameter></term>
     <listitem>
      <para>
-      Filename for the RRD database file.
+      RRD database file name.
      </para>
     </listitem>
    </varlistentry>
@@ -35,7 +35,7 @@
     <term><parameter>options</parameter></term>
     <listitem>
      <para>
-      Options with RRD database file properties, which will be changed. See
+      Options with RRD database file properties which will be changed. See
       rrd tune man page for details.
      </para>
     </listitem>
diff --git a/reference/rrd/functions/rrd-update.xml b/reference/rrd/functions/rrd-update.xml
index 69c80306ad..54c65a4d3c 100644
--- a/reference/rrd/functions/rrd-update.xml
+++ b/reference/rrd/functions/rrd-update.xml
@@ -4,8 +4,7 @@
 <refentry xml:id="function.rrd-update" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>rrd_update</refname>
-  <refpurpose>Updates the RRD database.
-  </refpurpose>
+  <refpurpose>Updates the RRD database.</refpurpose>
  </refnamediv>
 
  <refsect1 role="description">
@@ -16,7 +15,7 @@
    <methodparam><type>array</type><parameter>options</parameter></methodparam>
   </methodsynopsis>
   <para>
-   Updates the RRD database. The input data is time interpolated according to the
+   Updates the RRD database file. The input data is time interpolated according to the
    properties of the RRD database file.
   </para>
  </refsect1>
@@ -28,7 +27,7 @@
     <term><parameter>filename</parameter></term>
     <listitem>
      <para>
-	  Filename for RRD database file, which will be updated.
+	  RRD database file name. This database will be updated.
      </para>
     </listitem>
    </varlistentry>
@@ -36,7 +35,7 @@
     <term><parameter>options</parameter></term>
     <listitem>
      <para>
-      Options for rrd create - list of strings. See man page of rrd update
+      Options for updating the RRD database. This is list of strings. See man page of rrd update
       for whole list of options.
      </para>
     </listitem>
diff --git a/reference/rrd/functions/rrd-xport.xml b/reference/rrd/functions/rrd-xport.xml
index d1adb45f9f..5df2e797a2 100644
--- a/reference/rrd/functions/rrd-xport.xml
+++ b/reference/rrd/functions/rrd-xport.xml
@@ -4,7 +4,7 @@
 <refentry xml:id="function.rrd-xport" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>rrd_xport</refname>
-  <refpurpose>Export the information about database.</refpurpose>
+  <refpurpose>Exports the information about RRD database.</refpurpose>
  </refnamediv>
 
  <refsect1 role="description">
@@ -15,7 +15,7 @@
   </methodsynopsis>
   <para>
    Exports the information about RRD database file. This data can be converted
-   to XML file via user space PHP script and the restored back as RRD database
+   to XML file via user space PHP script and then restored back as RRD database
    file.
   </para>
  </refsect1>
@@ -27,7 +27,7 @@
     <term><parameter>options</parameter></term>
     <listitem>
      <para>
-	  Array of options for the export, see rrd export man page.
+	  Array of options for the export, see rrd xport man page.
      </para>
     </listitem>
    </varlistentry>
@@ -41,7 +41,6 @@
   </para>
  </refsect1>
 
-
 </refentry>
 
 <!-- Keep this comment at the end of the file
diff --git a/reference/rrd/rrdcreator/adddatasource.xml b/reference/rrd/rrdcreator/adddatasource.xml
index b4f2c8b61a..bd9d587b5c 100644
--- a/reference/rrd/rrdcreator/adddatasource.xml
+++ b/reference/rrd/rrdcreator/adddatasource.xml
@@ -4,7 +4,7 @@
 <refentry xml:id="rrdcreator.adddatasource" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>RRDCreator::addDataSource</refname>
-  <refpurpose>Adds data source definition into created RRD database.</refpurpose>
+  <refpurpose>Adds data source definition for RRD database.</refpurpose>
  </refnamediv>
 
  <refsect1 role="description">
@@ -14,8 +14,8 @@
    <methodparam><type>string</type><parameter>description</parameter></methodparam>
   </methodsynopsis>
   <para>
-   A RRD can accept input from several data sources (DS), e.g incomming and outgoing
-   traffic. This method adds data source by description of source. You need call
+   RRD can accept input from several data sources (DS), e.g incomming and outgoing
+   traffic. This method adds data source by description. You need call
    this method for each data source.
   </para>
  </refsect1>