--- nfo/perl/libs/XML/XUpdate/xupdate2xsl.xml	2003/05/07 12:41:17	1.5
+++ nfo/perl/libs/XML/XUpdate/xupdate2xsl.xml	2003/05/07 13:01:33	1.6
@@ -88,6 +88,12 @@
 
       <!-- Dispatch all "XUpdate Services" here. -->
       <!-- FIXME: Actually implement action = "CREATE|RETRIEVE|UPDATE|DELETE"!!! -->
+
+      <!-- 
+        xsl for XUpdate Services [2 XUpdate Syntax] [2.3 Modifications]
+      -->
+
+      <!-- xsl for [2.4 Inserts] -->
       <xsl:template match="xupdate:insert-after">
           <!-- <xsl:variable name="select" select="@select">Hello World!</xsl:variable> -->
           <xsl:call-template name="findcontext">
@@ -96,6 +102,7 @@
           </xsl:call-template>
       </xsl:template>
 
+      <!-- xsl for [2.4 Inserts] -->
       <xsl:template match="xupdate:insert-before">
           <xsl:call-template name="findcontext">
             <xsl:with-param name="service">Insert</xsl:with-param>
@@ -103,6 +110,7 @@
           </xsl:call-template>
       </xsl:template>
 
+      <!-- xsl for [2.5 Append] -->
       <xsl:template match="xupdate:append">
           <xsl:call-template name="findcontext">
             <xsl:with-param name="service">Append</xsl:with-param>
@@ -111,6 +119,7 @@
           </xsl:call-template>
       </xsl:template>
 
+      <!-- xsl for [2.6 Update] -->
       <xsl:template match="xupdate:update">
           <xsl:call-template name="findcontext">
             <xsl:with-param name="service">Update</xsl:with-param>
@@ -119,6 +128,7 @@
           </xsl:call-template>
       </xsl:template>
 
+      <!-- xsl for [2.7 Remove] -->
       <xsl:template match="xupdate:remove">
           <xsl:call-template name="findcontext">
             <xsl:with-param name="service">Remove</xsl:with-param>
@@ -127,6 +137,7 @@
           </xsl:call-template>
       </xsl:template>
 
+      <!-- xsl for [2.8 Rename] -->
       <xsl:template match="xupdate:rename">
           <xsl:call-template name="findcontext">
             <xsl:with-param name="service">Rename</xsl:with-param>
@@ -298,7 +309,12 @@
         element type seems dummy. Could this be stripped
         shorter somehow sometimes?
       -->
-      
+
+      <!-- 
+        xsl for [2.4 Inserts]
+      -->
+
+      <!-- xsl for [2.4.1 Creating Elements] -->
       <xsl:template match="xupdate:element">
           <xsl:comment> 3.a. vivify generic node </xsl:comment>
           <xsl:element name="xsl:element">
@@ -307,6 +323,7 @@
           </xsl:element>
       </xsl:template>
   
+      <!-- xsl for [2.4.2 Creating Attributes] -->
       <xsl:template match="xupdate:attribute">
           <xsl:comment> 3.b. vivify node attributes </xsl:comment>
           <xsl:element name="xsl:attribute">
@@ -315,6 +332,7 @@
           </xsl:element>
       </xsl:template>
   
+      <!-- xsl for [2.4.3 Creating Text] -->
       <xsl:template match="xupdate:text">
           <xsl:comment> 4.a. vivify text node </xsl:comment>
           <xsl:element name="xsl:text">
@@ -323,6 +341,7 @@
           </xsl:element>
       </xsl:template>
 
+      <!-- xsl for [2.4.4 Creating Processing Instructions] -->
       <xsl:template match="xupdate:processing-instruction">
           <xsl:comment> 4.b. vivify PI node </xsl:comment>
           <xsl:element name="xsl:processing-instruction">
@@ -331,6 +350,7 @@
           </xsl:element>
       </xsl:template>
 
+      <!-- xsl for [2.4.5 Creating Comments] -->
       <xsl:template match="xupdate:comment">
           <xsl:comment> 4.c. vivify comment node </xsl:comment>
           <xsl:element name="xsl:comment">
@@ -339,6 +359,7 @@
           </xsl:element>
       </xsl:template>
 
+
       <!-- 
         xsl for [2.9 Variables and Values of Variables]
         Encapsulates block payload into a named template.
@@ -354,25 +375,42 @@
                   <xsl:attribute name="name"><xsl:value-of select="@name" /></xsl:attribute>
               -->
               
-              <xsl:element name="xsl:apply-templates">
-                  <xsl:attribute name="select"><xsl:value-of select="@select" /></xsl:attribute>
-              </xsl:element>
+              <xsl:choose>
               
-                  <!-- <xsl:value-of select="@select" /> -->
-                  <xsl:value-of select="." />
+                <!-- Mode 1 [spec]: just evaluate as (sub-)selection if "select"-attribute is not empty -->
+                <xsl:when test="@select!=">
+                  <xsl:element name="xsl:apply-templates">
+                      <xsl:attribute name="select"><xsl:value-of select="@select" /></xsl:attribute>
+                  </xsl:element>
+                </xsl:when>
+                
+                <!-- Mode 2 [feature]: in other cases: pass thru the current node w/o any operation(s) on it -->
+                <xsl:otherwise>
+                    <xsl:value-of select="." />
+                </xsl:otherwise>
+                    
+              </xsl:choose>
+
               <!--
               </xsl:element>
               -->
-          
+
           </xsl:element>
 
       </xsl:template>
 
+      <!-- 
+        xsl for [2.9 Variables and Values of Variables]
+        Calls encapsulated named template "Variables" 
+        for each occourance of an "xupdate:value-of" element.
+      -->
       <xsl:template match="xupdate:value-of">
           <xsl:comment> 5.b. vivify xsl-element "value-of" </xsl:comment>
           <xsl:element name="xsl:call-template">
             <xsl:attribute name="name">Variables</xsl:attribute>
           </xsl:element>
+          
+        <!-- is this required any more??? -->
         <xsl:element name="xsl:value-of">
               <xsl:copy-of select="@*"/>
               <!-- <xsl:apply-templates /> -->