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diff --git a/doc/pazpar2_conf.xml b/doc/pazpar2_conf.xml
index 60cd710..74f778e 100644
--- a/doc/pazpar2_conf.xml
+++ b/doc/pazpar2_conf.xml
@@ -322,6 +322,11 @@
 	     all elements), or 'no' (don't merge; this is the
 	     default);
 	    </para>
+	    <para>
+	     Pazpar 1.6.24 also offers a new value for merge, 'first', which
+	     is like 'all' but only takes all from first database that returns
+	     the particular metadata field.
+	    </para>
 	   </listitem>
 	  </varlistentry>
 	  
@@ -361,6 +366,22 @@
 	  </varlistentry>
 	  
 	  <varlistentry>
+	   <term id="limitcluster">limitcluster</term>
+	   <listitem>
+	    <para>
+	     Allow a limit on merged metadata. The value of this attribute
+	     is the name of actual metadata content to be used for matching
+	     (most often same name as metadata name).
+	    </para>
+	    <note>
+	     <para>
+	      Requires Pazpar2 1.6.23 or later.
+	     </para>
+	    </note>
+	   </listitem>
+	  </varlistentry>
+	  
+	  <varlistentry>
 	   <term id="metadata_limitmap">limitmap</term>
 	   <listitem>
 	    <para>
@@ -780,7 +801,7 @@
   <para>
    The XML configuration may be partitioned into multiple files by using
    the <literal>include</literal> element which takes a single attribute,
-   <literal>src</literal>. The of the <literal>src</literal> attribute is
+   <literal>src</literal>. The <literal>src</literal> attribute is
    regular Shell like glob-pattern. For example,
    <screen><![CDATA[
    <include src="/etc/pazpar2/conf.d/*.xml"/>
@@ -1253,6 +1274,26 @@
      </listitem>
     </varlistentry>
     <varlistentry>
+     <term>pz:extendrecs</term>
+     <listitem>
+      <para>
+       If a show command goes to the boundary of a result set for a
+       database - depends on sorting - and pz:extendrecs is set to a positive
+       value. then Pazpar2 wait for show to fetch pz:extendrecs more
+       records. This setting is best used if a database does native
+       sorting, because the result set otherwise may be completely
+       re-sorted during extended fetch.
+       The default value of pz:extendrecs is 0 (no extended fetch).
+      </para>
+      <warning>
+       <para>
+	The pz:extendrecs setting appeared in Pazpar2 version 1.6.26.
+	But the bahavior changed with the release of Pazpar2 1.6.29.
+       </para>
+      </warning>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
      <term>pz:presentchunk</term>
      <listitem>
       <para>