From 6ad2d0565ecc721adfbc155605d2b2aa2d6334c6 Mon Sep 17 00:00:00 2001
From: shirazos7 <shiraz@zbmath.org>
Date: Tue, 28 Jan 2025 14:53:07 +0100
Subject: [PATCH] adjusting the optional templates

---
 xslt/articles/xslt-article-Datacite.xslt | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/xslt/articles/xslt-article-Datacite.xslt b/xslt/articles/xslt-article-Datacite.xslt
index 94a72bc4..92b4f17f 100644
--- a/xslt/articles/xslt-article-Datacite.xslt
+++ b/xslt/articles/xslt-article-Datacite.xslt
@@ -74,19 +74,25 @@ Content generated by zbMATH Open, such as reviews, classifications, software, or
 </xsl:template>
 <!-- Template for processing the rest of the  identifiers of our Metadata and considered as alternative identifiers-->
      <xsl:template match="identifier">
+          <xsl:if test="normalize-space(.) != '' and . != 'None'and . != 'none'">
         <alternateIdentifier alternateIdentifierType="zbMATH Identifier">
             <xsl:value-of select="."/>
         </alternateIdentifier>
+          </xsl:if>
         </xsl:template>
     <xsl:template match="id">
+         <xsl:if test="normalize-space(.) != '' and . != 'None'and . != 'none'">
     <alternateIdentifier alternateIdentifierType="zbMATH Document ID">
         <xsl:value-of select="."/>
     </alternateIdentifier>
+         </xsl:if>
     </xsl:template>
      <xsl:template match="zbmath_url">
+          <xsl:if test="normalize-space(.) != '' and . != 'None'and . != 'none'">
         <alternateIdentifier alternateIdentifierType="URL">
             <xsl:value-of select="."/>
         </alternateIdentifier>
+          </xsl:if>
     </xsl:template>
 
     <!-- Template for processing authors -->
@@ -129,9 +135,11 @@ Content generated by zbMATH Open, such as reviews, classifications, software, or
             </xsl:template>
     <!-- Template for processing the language of the document -->
       <xsl:template match="languages">
+           <xsl:if test="normalize-space(.) != '' and . != 'None'and . != 'none'">
             <language>
              <xsl:value-of select="."/>
             </language>
+           </xsl:if>
             </xsl:template>
     <!-- Template for processing  the document type which can be various and needs to be properly handeld -->
     <xsl:template match="description">
@@ -197,16 +205,18 @@ Content generated by zbMATH Open, such as reviews, classifications, software, or
 
 <!-- Template for processing text node into description text with its subproperty -->
         <xsl:template match="text">
-            <!-- Transformation of  description text -->
+            <xsl:if test="normalize-space(.) != '' and . != 'None'and . != 'none'">
         <description xml:lang="en" descriptionType="Abstract">
 
          <xsl:value-of select="normalize-space(.)"/>
 
         </description>
+            </xsl:if>
         </xsl:template>
      <!-- Template for processing MSC  (Mathematics Subject Classification)
       transforming all its values -->
     <xsl:template match="msc">
+         <xsl:if test="normalize-space(.) != '' and . != 'None'and . != 'none'">
     <subject>
         <xsl:attribute name="subjectScheme">
             <xsl:value-of select="scheme"/>
@@ -216,23 +226,25 @@ Content generated by zbMATH Open, such as reviews, classifications, software, or
         </xsl:attribute>
         <xsl:value-of select="text"/>
     </subject>
+         </xsl:if>
 </xsl:template>
-<!-- Template for processing keywords it is also under the subject section with MSC'S
-with its own subjectscheme -->
+
 
        <xsl:template match="keywords">
-            <!-- Transformation of  keywords -->
+            <xsl:if test="normalize-space(.) != '' and . != 'None'and . != 'none'">
+
         <subject subjectScheme="keyword">
             <xsl:value-of select="."/>
         </subject>
+            </xsl:if>
         </xsl:template>
 
-<!-- Template for processing DOI references -->
+
   <xsl:template match="doi[normalize-space()]">
         <relatedIdentifier relatedIdentifierType="DOI" relationType="Cites" resourceTypeGeneral="JournalArticle"><xsl:value-of select="normalize-space(.)"/></relatedIdentifier>
     </xsl:template>
 
-    <!-- Template to handle references with empty DOI elements and take the value of document_id also adding the url of zbmath to the result -->
+
     <xsl:template match="references[not(doi[normalize-space()])]">
         <relatedIdentifier relatedIdentifierType="URL" relationType="IsCitedBy"><xsl:value-of select="concat('https://zbmath.org/', zbmath/document_id)"/></relatedIdentifier>
     </xsl:template>