Improved alt text handling and added/fixed support for numerous other tags.

src/xsl/openlearn2daisyhtml/inline.xsl

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="UTF-8"?>
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
   <xsl:template match="b">
     <!-- b not available -->
@@ -38,10 +38,12 @@
   </xsl:template>
   <xsl:template match="SideNote">
     <br/>
+    <hr/>
     <span class="required-prodnote">Side note</span>
-    <xsl:apply-templates/>
     <br/>
+    <xsl:apply-templates/>
     <span class="optional-prodnote">End of side note</span>
+    <hr/>
     <br/>
   </xsl:template>
   <xsl:template match="SideNote/Heading">
@@ -56,10 +58,12 @@
   </xsl:template>
   <xsl:template match="Footnote">
     <br/>
+    <hr/>
     <span class="required-prodnote">Footnote</span>
     <br/>
     <xsl:apply-templates/>
     <br/>
+    <hr/>
     <span class="optional-prodnote">End of footnote</span>
     <br/>
   </xsl:template>

src/xsl/openlearn2daisyhtml/lang.xsl

@@ -2,16 +2,20 @@
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
   <xsl:template name="apply-templates-lang">
     <xsl:for-each select="@xml:lang">
+      <xsl:if test="string-length(.) &gt; 0">
         <xsl:copy/>
+      </xsl:if>
     </xsl:for-each>
     <xsl:apply-templates/>
   </xsl:template>
   <xsl:template match="language">
+    <xsl:if test="string-length(@val) &gt; 0">
       <span>
         <xsl:attribute name="xml:lang">
           <xsl:value-of select="@val"/>
         </xsl:attribute>
         <xsl:apply-templates/>
       </span>
+    </xsl:if>
   </xsl:template>
 </xsl:stylesheet>

src/xsl/openlearn2daisyhtml/object.xsl

@@ -103,20 +103,36 @@
     <p>
       <span class="optional-prodnote">Figure</span>
     </p>
-    <p>
+    <xsl:choose>
+      <xsl:when test="string-length(./Image/@src) &gt; 0">
         <img>
           <xsl:attribute name="src">
             <xsl:value-of select="./Image/@src"/>
           </xsl:attribute>
           <xsl:attribute name="alt">
+            <xsl:choose>
+              <xsl:when test="string-length(./Image/@alt) &gt; 0">
                 <xsl:value-of select="./Image/@alt"/>
+              </xsl:when>
+              <xsl:when test="string-length(Alternative) &gt; 0">
+                <xsl:value-of select="Alternative"/>
+              </xsl:when>
+              <xsl:otherwise>
+                <xsl:text>no alternative text</xsl:text>
+              </xsl:otherwise>
+            </xsl:choose>
           </xsl:attribute>
         </img>
+      </xsl:when>
+      <xsl:otherwise>
+        <p>
+          <xsl:apply-templates select="./Image/text() | ./Image/* "/>
         </p>
+      </xsl:otherwise>
+    </xsl:choose>
     <xsl:apply-templates select="Caption"/>
-    <xsl:apply-templates select="Alternative"/>
     <xsl:apply-templates select="Description"/>
-    <xsl:apply-tempaltes select="SourceReference"/>
+    <xsl:apply-templates select="SourceReference"/>
     <p>
       <span class="optional-prodnote">End of figure</span>
     </p>
@@ -125,22 +141,39 @@
     <p>
       <span class="optional-prodnote">Equation</span>
     </p>
-    <p>
+    <xsl:choose>
+      <xsl:when test="string-length(./Image/@src) &gt; 0">
         <img>
           <xsl:attribute name="src">
             <xsl:value-of select="./Image/@src"/>
           </xsl:attribute>
           <xsl:attribute name="alt">
+            <xsl:choose>
+              <xsl:when test="string-length(./Image/@alt) &gt; 0">
                 <xsl:value-of select="./Image/@alt"/>
+              </xsl:when>
+              <xsl:when test="string-length(Alternative) &gt; 0">
+                <xsl:value-of select="Alternative"/>
+              </xsl:when>
+              <xsl:otherwise>
+                <xsl:text>no alternative text</xsl:text>
+              </xsl:otherwise>
+            </xsl:choose>
           </xsl:attribute>
         </img>
+      </xsl:when>
+      <xsl:otherwise>
+        <p>
+          <xsl:apply-templates select="./Image/text() | ./Image/* "/>
         </p>
+      </xsl:otherwise>
+    </xsl:choose>
+    <xsl:apply-templates select="Label"/>
     <xsl:apply-templates select="TeX"/>
     <xsl:apply-templates select="MathML"/>
     <xsl:apply-templates select="Caption"/>
-    <xsl:apply-templates select="Alternative"/>
     <xsl:apply-templates select="Description"/>
-    <xsl:apply-tempaltes select="SourceReference"/>
+    <xsl:apply-templates select="SourceReference"/>
     <span class="optional-prodnote">End of equation</span>
   </xsl:template>
   <xsl:template match="Equation/TeX">

src/xsl/openlearn2daisyhtml/structure.xsl

@@ -10,9 +10,11 @@
   </xsl:template>
   <xsl:template match="UnitID"/>
   <xsl:template match="UnitTitle">
+    <xsl:if test="string-length(./text()) &gt; 0">
       <h1>
         <xsl:call-template name="apply-templates-lang"/>
       </h1>
+    </xsl:if>
   </xsl:template>
   <xsl:template match="Unit/ByLine">
     <p>
@@ -125,14 +127,18 @@
   </xsl:template>
   <xsl:template match="MediaContent">
     <xsl:if test="@type = 'audio'">
-      <p><span class="required-prodnote">[Audio content]</span></p>
+      <p>
+        <span class="required-prodnote">[Audio content]</span>
+      </p>
       <p>
         <a><xsl:attribute name="href"><xsl:value-of select="@src"/>.mp3</xsl:attribute>MP3 file
       </a>
       </p>
     </xsl:if>
     <xsl:if test="@type = 'pdf'">
-      <p><span class="required-prodnote">[PDF content]</span></p>
+      <p>
+        <span class="required-prodnote">[PDF content]</span>
+      </p>
       <!--<p><a><xsl:attribute name="href"><xsl:value-of select="@src"/>.pdf</xsl:attribute></a></p>-->
     </xsl:if>
     <xsl:call-template name="apply-templates-lang"/>
@@ -162,22 +168,32 @@
   </xsl:template>
   <xsl:template match="Caption">
     <p>
+      <span class="caption">
         <xsl:call-template name="apply-templates-lang"/>
+      </span>
     </p>
   </xsl:template>
   <xsl:template match="Alternative">
     <p>
+      <xsl:if test="string-length(.) &gt; 0">
+        <span class="optional-prodnote"><strong>Alternative</strong>: </span>
+      </xsl:if>
       <xsl:call-template name="apply-templates-lang"/>
     </p>
   </xsl:template>
   <xsl:template match="Description">
     <p>
+      <xsl:if test="string-length(.) &gt; 0">
+        <span class="optional-prodnote"><strong>Description</strong>: </span>
+      </xsl:if>
       <xsl:call-template name="apply-templates-lang"/>
     </p>
   </xsl:template>
   <xsl:template match="Label">
     <p>
+      <strong>
         <xsl:call-template name="apply-templates-lang"/>
+      </strong>
     </p>
   </xsl:template>
   <xsl:template match="Table">