diff --git a/catalog.xml b/catalog.xml
index c707851..9641d2f 100644
--- a/catalog.xml
+++ b/catalog.xml
@@ -33,4 +33,14 @@
     
     <!-- Map an xs:import or xs:include to an XSLT stylesheet which ends with a certain suffix to an XSLT stylesheet located relative to this XML catalog -->
     <!--<uriSuffix uriSuffix="docbook.xsl" uri="../../docbook/xsl/fo/docbook.xsl"/>-->
+    
+<!--    <uriSuffix uriSuffix="NKJP_1M_header.xml" uri="test/resources/nkjp2korap_sample2/NKJP_1M_header.xml"/>
+    <uri name="NKJP_1M_header.xml" uri="test/resources/nkjp2korap_sample2/NKJP_1M_header.xml"/>
+these two won't work for xi:include
+    -->
+<!--    <system systemId="file:/home/piotr/projects/NKJP2KorAP/test/resources/nkjp2korap_sample2/KOT/NKJP_1M_header.xml" uri="test/resources/nkjp2korap_sample2/NKJP_1M_header.xml"/>
+this one does work for inclusions, but it's too brutal
+    -->
+    <systemSuffix systemIdSuffix="NKJP_1M_header.xml" uri="test/resources/nkjp2korap_sample2/NKJP_1M_header.xml"/>
+    <!--  for inclusions of the main corpus header  -->
 </catalog>
\ No newline at end of file
diff --git a/test/resources/nkjp2korap_sample2/HellerPodgladanie/text.xml b/test/resources/nkjp2korap_sample2/HellerPodgladanie/text.xml
index 5e7ab49..cd4e542 100644
--- a/test/resources/nkjp2korap_sample2/HellerPodgladanie/text.xml
+++ b/test/resources/nkjp2korap_sample2/HellerPodgladanie/text.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <teiCorpus xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:nkjp="http://www.nkjp.pl/ns/1.0" xmlns="http://www.tei-c.org/ns/1.0">
-  <xi:include href="KORBA_header.xml"/>
+  <xi:include href="NKJP_1M_header.xml"/>
   <TEI>
     <xi:include href="header.xml"/>
     <text>
diff --git a/test/resources/nkjp2korap_sample2/IsakowiczZaleskiMoje/text.xml b/test/resources/nkjp2korap_sample2/IsakowiczZaleskiMoje/text.xml
index d8e379c..08ef7e0 100644
--- a/test/resources/nkjp2korap_sample2/IsakowiczZaleskiMoje/text.xml
+++ b/test/resources/nkjp2korap_sample2/IsakowiczZaleskiMoje/text.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <teiCorpus xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:nkjp="http://www.nkjp.pl/ns/1.0" xmlns="http://www.tei-c.org/ns/1.0">
-  <xi:include href="KORBA_header.xml"/>
+  <xi:include href="NKJP_1M_header.xml"/>
   <TEI>
     <xi:include href="header.xml"/>
     <text>
diff --git a/test/resources/nkjp2korap_sample2/KOT/text.xml b/test/resources/nkjp2korap_sample2/KOT/text.xml
index bf91b94..9618794 100644
--- a/test/resources/nkjp2korap_sample2/KOT/text.xml
+++ b/test/resources/nkjp2korap_sample2/KOT/text.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <teiCorpus xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:nkjp="http://www.nkjp.pl/ns/1.0" xmlns="http://www.tei-c.org/ns/1.0">
-  <xi:include href="KORBA_header.xml"/>
+  <xi:include href="NKJP_1M_header.xml"/>
   <TEI>
     <xi:include href="header.xml"/>
     <text>
diff --git a/test/resources/nkjp2korap_sample2/KolakowskiOco/text.xml b/test/resources/nkjp2korap_sample2/KolakowskiOco/text.xml
index d5a9478..73b330a 100644
--- a/test/resources/nkjp2korap_sample2/KolakowskiOco/text.xml
+++ b/test/resources/nkjp2korap_sample2/KolakowskiOco/text.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <teiCorpus xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:nkjp="http://www.nkjp.pl/ns/1.0" xmlns="http://www.tei-c.org/ns/1.0">
-  <xi:include href="KORBA_header.xml"/>
+  <xi:include href="NKJP_1M_header.xml"/>
   <TEI>
     <xi:include href="header.xml"/>
     <text>
diff --git a/test/resources/nkjp2korap_sample2/MysliwskiKamien/text.xml b/test/resources/nkjp2korap_sample2/MysliwskiKamien/text.xml
index 0547fce..a17e4db 100644
--- a/test/resources/nkjp2korap_sample2/MysliwskiKamien/text.xml
+++ b/test/resources/nkjp2korap_sample2/MysliwskiKamien/text.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <teiCorpus xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:nkjp="http://www.nkjp.pl/ns/1.0" xmlns="http://www.tei-c.org/ns/1.0">
-  <xi:include href="KORBA_header.xml"/>
+  <xi:include href="NKJP_1M_header.xml"/>
   <TEI>
     <xi:include href="header.xml"/>
     <text>
diff --git a/test/resources/nkjp2korap_sample2/WilkWilczy/text.xml b/test/resources/nkjp2korap_sample2/WilkWilczy/text.xml
index 897b83a..6c14da3 100644
--- a/test/resources/nkjp2korap_sample2/WilkWilczy/text.xml
+++ b/test/resources/nkjp2korap_sample2/WilkWilczy/text.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <teiCorpus xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:nkjp="http://www.nkjp.pl/ns/1.0" xmlns="http://www.tei-c.org/ns/1.0">
-  <xi:include href="KORBA_header.xml"/>
+  <xi:include href="NKJP_1M_header.xml"/>
   <TEI>
     <xi:include href="header.xml"/>
     <text>
diff --git a/test/resources/nkjp2korap_sample2/ZycieWarszawy_Zycie/text.xml b/test/resources/nkjp2korap_sample2/ZycieWarszawy_Zycie/text.xml
index 095ead3..49fff89 100644
--- a/test/resources/nkjp2korap_sample2/ZycieWarszawy_Zycie/text.xml
+++ b/test/resources/nkjp2korap_sample2/ZycieWarszawy_Zycie/text.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <teiCorpus xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:nkjp="http://www.nkjp.pl/ns/1.0" xmlns="http://www.tei-c.org/ns/1.0">
-  <xi:include href="KORBA_header.xml"/>
+  <xi:include href="NKJP_1M_header.xml"/>
   <TEI>
     <xi:include href="header.xml"/>
     <text>