diff -r f2b0d849ea77 -r b85b13b1c2ec plcopen/instance_tagname.xslt
--- a/plcopen/instance_tagname.xslt	Fri Feb 16 01:38:34 2018 +0100
+++ b/plcopen/instance_tagname.xslt	Fri Feb 16 01:48:48 2018 +0100
@@ -1,8 +1,6 @@
 <?xml version="1.0"?>
-<xsl:stylesheet xmlns:func="http://exslt.org/functions" xmlns:dyn="http://exslt.org/dynamic" xmlns:str="http://exslt.org/strings" xmlns:math="http://exslt.org/math" xmlns:exsl="http://exslt.org/common" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:yml="http://fdik.org/yml" xmlns:set="http://exslt.org/sets" xmlns:ppx="http://www.plcopen.org/xml/tc6_0201" xmlns:ns="instance_tagname_ns" xmlns:regexp="http://exslt.org/regular-expressions" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" extension-element-prefixes="ns" version="1.0" exclude-result-prefixes="ns">
+<xsl:stylesheet xmlns:exsl="http://exslt.org/common" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:ppx="http://www.plcopen.org/xml/tc6_0201" xmlns:ns="instance_tagname_ns" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" extension-element-prefixes="ns" version="1.0" exclude-result-prefixes="ns">
   <xsl:output method="xml"/>
-  <xsl:variable name="space" select="'                                                                                                                                                                                                        '"/>
-  <xsl:param name="autoindent" select="4"/>
   <xsl:param name="instance_path"/>
   <xsl:variable name="project">
     <xsl:copy-of select="document('project')/project/*"/>
@@ -14,7 +12,6 @@
     <xsl:copy-of select="document('extensions')/extensions/*"/>
   </xsl:variable>
   <xsl:template name="element_name">
-    <xsl:param name="_indent" select="0"/>
     <xsl:param name="path"/>
     <xsl:choose>
       <xsl:when test="contains($path,'.')">
@@ -26,7 +23,6 @@
     </xsl:choose>
   </xsl:template>
   <xsl:template name="next_path">
-    <xsl:param name="_indent" select="0"/>
     <xsl:param name="path"/>
     <xsl:choose>
       <xsl:when test="contains($path,'.')">
@@ -35,14 +31,12 @@
     </xsl:choose>
   </xsl:template>
   <xsl:template match="ppx:project">
-    <xsl:param name="_indent" select="0"/>
     <xsl:variable name="config_name">
       <xsl:call-template name="element_name">
         <xsl:with-param name="path" select="$instance_path"/>
       </xsl:call-template>
     </xsl:variable>
     <xsl:apply-templates select="ppx:instances/ppx:configurations/ppx:configuration[@name=$config_name]">
-      <xsl:with-param name="_indent" select="$_indent + (1) * $autoindent"/>
       <xsl:with-param name="element_path">
         <xsl:call-template name="next_path">
           <xsl:with-param name="path" select="$instance_path"/>
@@ -51,7 +45,6 @@
     </xsl:apply-templates>
   </xsl:template>
   <xsl:template match="ppx:configuration">
-    <xsl:param name="_indent" select="0"/>
     <xsl:param name="element_path"/>
     <xsl:choose>
       <xsl:when test="$element_path!=''">
@@ -61,7 +54,6 @@
           </xsl:call-template>
         </xsl:variable>
         <xsl:apply-templates select="ppx:resource[@name=$child_name] | ppx:globalVars/ppx:variable[@name=$child_name]/ppx:type/*[self::ppx:derived or self::ppx:struct or self::ppx:array]">
-          <xsl:with-param name="_indent" select="$_indent + (1) * $autoindent"/>
           <xsl:with-param name="element_path">
             <xsl:call-template name="next_path">
               <xsl:with-param name="path" select="$element_path"/>
@@ -75,7 +67,6 @@
     </xsl:choose>
   </xsl:template>
   <xsl:template match="ppx:resource">
-    <xsl:param name="_indent" select="0"/>
     <xsl:param name="element_path"/>
     <xsl:choose>
       <xsl:when test="$element_path!=''">
@@ -87,7 +78,6 @@
           </xsl:call-template>
         </xsl:variable>
         <xsl:apply-templates select="ppx:pouInstance[@name=$child_name] | ppx:task/ppx:pouInstance[@name=$child_name] | ppx:globalVars/ppx:variable[@name=$child_name]/ppx:type/*[self::ppx:derived or self::ppx:struct or self::ppx:array]">
-          <xsl:with-param name="_indent" select="$_indent + (1) * $autoindent"/>
           <xsl:with-param name="element_path">
             <xsl:call-template name="next_path">
               <xsl:with-param name="path" select="$element_path"/>
@@ -101,18 +91,15 @@
     </xsl:choose>
   </xsl:template>
   <xsl:template match="ppx:pouInstance">
-    <xsl:param name="_indent" select="0"/>
     <xsl:param name="element_path"/>
     <xsl:variable name="type_name">
       <xsl:value-of select="@typeName"/>
     </xsl:variable>
     <xsl:apply-templates select="exsl:node-set($project)/ppx:project/ppx:types/ppx:pous/ppx:pou[@name=$type_name] |&#10;                 exsl:node-set($project)/ppx:project/ppx:types/ppx:dataTypes/ppx:dataType[@name=$type_name] |&#10;                 exsl:node-set($stdlib)/ppx:project/ppx:types/ppx:pous/ppx:pou[@name=$type_name] |&#10;                 exsl:node-set($stdlib)/ppx:project/ppx:types/ppx:dataTypes/ppx:dataType[@name=$type_name] |&#10;                 exsl:node-set($extensions)/ppx:project/ppx:types/ppx:pous/ppx:pou[@name=$type_name] |&#10;                 exsl:node-set($extensions)/ppx:project/ppx:types/ppx:dataTypes/ppx:dataType[@name=$type_name]">
-      <xsl:with-param name="_indent" select="$_indent + (1) * $autoindent"/>
       <xsl:with-param name="element_path" select="$element_path"/>
     </xsl:apply-templates>
   </xsl:template>
   <xsl:template match="ppx:pou">
-    <xsl:param name="_indent" select="0"/>
     <xsl:param name="element_path"/>
     <xsl:choose>
       <xsl:when test="$element_path!=''">
@@ -122,16 +109,13 @@
           </xsl:call-template>
         </xsl:variable>
         <xsl:apply-templates select="ppx:interface/*/ppx:variable[@name=$child_name]/ppx:type/*[self::ppx:derived or self::ppx:struct or self::ppx:array]">
-          <xsl:with-param name="_indent" select="$_indent + (1) * $autoindent"/>
           <xsl:with-param name="element_path">
             <xsl:call-template name="next_path">
               <xsl:with-param name="path" select="$element_path"/>
             </xsl:call-template>
           </xsl:with-param>
         </xsl:apply-templates>
-        <xsl:apply-templates select="ppx:actions/ppx:action[@name=$child_name] | ppx:transitions/ppx:transition[@name=$child_name]">
-          <xsl:with-param name="_indent" select="$_indent + (1) * $autoindent"/>
-        </xsl:apply-templates>
+        <xsl:apply-templates select="ppx:actions/ppx:action[@name=$child_name] | ppx:transitions/ppx:transition[@name=$child_name]"/>
       </xsl:when>
       <xsl:otherwise>
         <xsl:variable name="name">
@@ -142,42 +126,33 @@
     </xsl:choose>
   </xsl:template>
   <xsl:template match="ppx:action">
-    <xsl:param name="_indent" select="0"/>
     <xsl:value-of select="ns:ActionTagName(ancestor::ppx:pou/@name, @name)"/>
   </xsl:template>
   <xsl:template match="ppx:transition">
-    <xsl:param name="_indent" select="0"/>
     <xsl:value-of select="ns:TransitionTagName(ancestor::ppx:pou/@name, @name)"/>
   </xsl:template>
   <xsl:template match="ppx:dataType">
-    <xsl:param name="_indent" select="0"/>
     <xsl:param name="element_path"/>
     <xsl:apply-templates select="ppx:baseType/*[self::ppx:derived or self::ppx:struct or self::ppx:array]">
-      <xsl:with-param name="_indent" select="$_indent + (1) * $autoindent"/>
       <xsl:with-param name="element_path" select="$element_path"/>
     </xsl:apply-templates>
   </xsl:template>
   <xsl:template match="ppx:derived">
-    <xsl:param name="_indent" select="0"/>
     <xsl:param name="element_path"/>
     <xsl:variable name="type_name">
       <xsl:value-of select="@name"/>
     </xsl:variable>
     <xsl:apply-templates select="exsl:node-set($project)/ppx:project/ppx:types/ppx:pous/ppx:pou[@name=$type_name] |&#10;                 exsl:node-set($project)/ppx:project/ppx:types/ppx:dataTypes/ppx:dataType[@name=$type_name] |&#10;                 exsl:node-set($stdlib)/ppx:project/ppx:types/ppx:pous/ppx:pou[@name=$type_name] |&#10;                 exsl:node-set($stdlib)/ppx:project/ppx:types/ppx:dataTypes/ppx:dataType[@name=$type_name] |&#10;                 exsl:node-set($extensions)/ppx:project/ppx:types/ppx:pous/ppx:pou[@name=$type_name] |&#10;                 exsl:node-set($extensions)/ppx:project/ppx:types/ppx:dataTypes/ppx:dataType[@name=$type_name]">
-      <xsl:with-param name="_indent" select="$_indent + (1) * $autoindent"/>
       <xsl:with-param name="element_path" select="$element_path"/>
     </xsl:apply-templates>
   </xsl:template>
   <xsl:template match="ppx:array">
-    <xsl:param name="_indent" select="0"/>
     <xsl:param name="element_path"/>
     <xsl:apply-templates select="ppx:baseType/*[self::ppx:derived or self::ppx:struct or self::ppx:array]">
-      <xsl:with-param name="_indent" select="$_indent + (1) * $autoindent"/>
       <xsl:with-param name="element_path" select="$element_path"/>
     </xsl:apply-templates>
   </xsl:template>
   <xsl:template match="ppx:struct">
-    <xsl:param name="_indent" select="0"/>
     <xsl:param name="element_path"/>
     <xsl:variable name="child_name">
       <xsl:call-template name="element_name">
@@ -185,7 +160,6 @@
       </xsl:call-template>
     </xsl:variable>
     <xsl:apply-templates select="ppx:variable[@name=$child_name]/ppx:type/*[self::ppx:derived or self::ppx:struct or self::ppx:array]">
-      <xsl:with-param name="_indent" select="$_indent + (1) * $autoindent"/>
       <xsl:with-param name="element_path">
         <xsl:call-template name="next_path">
           <xsl:with-param name="path" select="$element_path"/>