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<xsl:stylesheet version="1.0"

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    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"

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    xmlns:ppx="http://www.plcopen.org/xml/tc6_0201"

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    xmlns:ns="instances_ns"

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    extension-element-prefixes="ns"

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    exclude-result-prefixes="ns">

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  <xsl:param name="instance_type"/>

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  <xsl:template match="ppx:project">

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   <instances>

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     <xsl:apply-templates select="ppx:instances/ppx:configurations/ppx:configuration"/>

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   </instances>

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  </xsl:template>

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  <xsl:template match="ppx:configuration">

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    <xsl:apply-templates select="ppx:globalVars/ppx:variable[ppx:type/ppx:derived]">

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      <xsl:with-param name="parent_path" select="@name"/>

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    </xsl:apply-templates>

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    <xsl:apply-templates select="ppx:resource">

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      <xsl:with-param name="parent_path" select="@name"/>

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    </xsl:apply-templates>

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  </xsl:template>

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  <xsl:template match="ppx:resource">

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    <xsl:param name="parent_path"/>

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    <xsl:variable name="resource_path">

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      <xsl:value-of select="$parent_path"/>

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      <xsl:text>.</xsl:text>

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      <xsl:value-of select="@name"/>

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    </xsl:variable>

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    <xsl:apply-templates select="ppx:globalVars/ppx:variable[ppx:type/ppx:derived]">

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      <xsl:with-param name="parent_path" select="$resource_path"/>

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    </xsl:apply-templates>

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    <xsl:apply-templates select="ppx:pouInstance | ppx:task/ppx:pouInstance">

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      <xsl:with-param name="parent_path" select="$resource_path"/>

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    </xsl:apply-templates>

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  </xsl:template>

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  <xsl:template match="ppx:pouInstance">

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    <xsl:param name="parent_path"/>

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    <xsl:variable name="pou_instance_path">

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      <xsl:value-of select="$parent_path"/>

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      <xsl:text>.</xsl:text>

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      <xsl:value-of select="@name"/>

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    </xsl:variable>

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    <xsl:choose>

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      <xsl:when test="@typeName=$instance_type">

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        <instance>

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          <xsl:attribute name="path">

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            <xsl:value-of select="$pou_instance_path"/>

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          </xsl:attribute>

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        </instance>

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      </xsl:when>

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      <xsl:otherwise>

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        <ns:instance_definition>

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          <xsl:attribute name="name">

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            <xsl:value-of select="@typeName"/>

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          </xsl:attribute>

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          <xsl:attribute name="path">

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            <xsl:value-of select="$pou_instance_path"/>

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          </xsl:attribute>

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        </ns:instance_definition>

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      </xsl:otherwise>

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    </xsl:choose>

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  </xsl:template>

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  <xsl:template match="ppx:pou">

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    <xsl:param name="instance_path"/>

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    <xsl:apply-templates select="ppx:interface/*/ppx:variable[ppx:type/ppx:derived]">

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      <xsl:with-param name="parent_path" select="$instance_path"/>

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    </xsl:apply-templates>

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  </xsl:template>

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  <xsl:template match="ppx:dataType">

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    <xsl:param name="instance_path"/>

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    <xsl:apply-templates select="ppx:baseType/*[self::ppx:derived or self::ppx:struct or self::ppx:array]">

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      <xsl:with-param name="parent_path" select="$instance_path"/>

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    </xsl:apply-templates>

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  </xsl:template>

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  <xsl:template match="ppx:variable">

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    <xsl:param name="parent_path"/>

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    <xsl:variable name="variable_path">

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      <xsl:value-of select="$parent_path"/>

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      <xsl:text>.</xsl:text>

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      <xsl:value-of select="@name"/>

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    </xsl:variable>

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    <xsl:apply-templates select="ppx:type/ppx:derived">

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      <xsl:with-param name="variable_path" select="$variable_path"/>

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    </xsl:apply-templates>

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  </xsl:template>

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  <xsl:template match="ppx:derived">

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    <xsl:param name="variable_path"/>

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    <xsl:choose>

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      <xsl:when test="@name=$instance_type">

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        <instance>

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          <xsl:attribute name="path">

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            <xsl:value-of select="$variable_path"/>

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          </xsl:attribute>

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        </instance>

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      </xsl:when>

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      <xsl:otherwise>

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        <ns:instance_definition>

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          <xsl:attribute name="name">

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            <xsl:value-of select="@name"/>

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          </xsl:attribute>

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          <xsl:attribute name="path">

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            <xsl:value-of select="$variable_path"/>

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          </xsl:attribute>

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        </ns:instance_definition>

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      </xsl:otherwise>

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    </xsl:choose>

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  </xsl:template>

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  <xsl:template name="ppx:struct">

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    <xsl:param name="variable_path"/>

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    <xsl:for-each select="ppx:variable[ppx:type/ppx:derived or ppx:type/ppx:struct or ppx:type/ppx:array]">

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      <xsl:variable name="element_path">

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        <xsl:value-of select="$variable_path"/>

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        <xsl:text>.</xsl:text>

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        <xsl:value-of select="@name"/>

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      </xsl:variable>

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      <xsl:apply-templates select="ppx:type/*[self::ppx:derived or self::ppx:struct or self::ppx:array]">

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        <xsl:with-param name="variable_path" select="$element_path"/>

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      </xsl:apply-templates>

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    </xsl:for-each>

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  </xsl:template>

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  <xsl:template name="ppx:array">

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    <xsl:param name="variable_path"/>

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    <xsl:apply-templates select="ppx:baseType/*[self::ppx:derived or self::ppx:struct or self::ppx:array]">

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      <xsl:with-param name="variable_path" select="$variable_path"/>

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    </xsl:apply-templates> 

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  </xsl:template>

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  <xsl:template match="pou_instance">

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    <xsl:apply-templates>

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      <xsl:with-param name="instance_path" select="@pou_path"/>

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    </xsl:apply-templates>

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  </xsl:template>

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  <xsl:template match="datatype_instance">

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    <xsl:apply-templates>

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      <xsl:with-param name="instance_path" select="@datatype_path"/>

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    </xsl:apply-templates>

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  </xsl:template>

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  <xsl:template match="text()"/>

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</xsl:stylesheet>