Merge pull request #147 from MaRDI4NFDI/Open-Aire-software-fix

Open aire software fix of xslt

xslt/software/xslt-software-OpenAire.xslt

@@ -32,10 +32,12 @@
         </datacite:subjects>
            </xsl:if>
 
+             <xsl:if test="root/standard_articles/id[normalize-space(.) != '' and . != 'None'] or root/references[normalize-space(.) != '' and . != 'None']">
              <datacite:relatedIdentifiers>
                 <xsl:apply-templates select="root/standard_articles/id"/>
                  <xsl:apply-templates select="root/references"/>
              </datacite:relatedIdentifiers>
+           </xsl:if>
 
            <datacite:alternateIdentifier alternateIdentifierType="URL">
             <xsl:apply-templates  select="root/homepage"/>
@@ -137,13 +139,15 @@ Content generated by zbMATH Open, such as reviews, classifications, software, or
     </xsl:template>
 
      <xsl:template match="title">
+          <xsl:if test="normalize-space(.) != '' and . != 'None'">
     <oaire:citationTitle>
     <xsl:value-of select="."/>
     </oaire:citationTitle>
+          </xsl:if>
     </xsl:template>
 
    <xsl:template match="standard_articles/id">
-    <xsl:if test="normalize-space(.)">
+    <xsl:if test="normalize-space(.) != '' and . != 'None'">
         <!-- If the id element is present and not empty -->
         <datacite:relatedIdentifier relatedIdentifierType="URL" relationType="IsReferencedBy">
             <xsl:value-of select="concat('https://zbmath.org/', normalize-space(.))"/>
@@ -152,7 +156,7 @@ Content generated by zbMATH Open, such as reviews, classifications, software, or
 </xsl:template>
 
     <xsl:template match="references">
-    <xsl:if test="normalize-space(.)">
+    <xsl:if test="normalize-space(.) != '' and . != 'None'">
         <!-- If the id element is present and not empty -->
         <datacite:relatedIdentifier relatedIdentifierType="URL" relationType="IsCitedBy">
             <xsl:value-of select="concat('https://api.zbmath.org/v1/document/', normalize-space(.))"/>