no data content is now possible with null value.

src/xid/IdData.java

@@ -37,7 +37,7 @@ public class IdData implements Serializable, IdDataCore
     this.attributes = null;
     this.excludeSection = false;
     this.displayMode = MODE.REPLACE;
-    this.content = "";
+    this.content = null;
     this.iterationStrategy = IterationStrategy.ALL_ROWS;
   }
 
@@ -62,14 +62,7 @@ public class IdData implements Serializable, IdDataCore
   {
     String result;
     
-    if (this.content == null)
+    result = this.content;
-      {
-	result = "";
-      }
-    else
-      {
-	result = this.content;
-      }
     
     //
     return (result);
@@ -90,7 +83,14 @@ public class IdData implements Serializable, IdDataCore
    */
   public void appendContent (String text)
   {
-    this.content += text;
+    if (this.content == null)
+      {
+	this.content = text;
+      }
+    else
+      {
+	this.content += text;
+      }
   }
 
 

src/xid/Presenter.java

@@ -538,7 +538,7 @@ public class Presenter
 		result.append (processAttributes (attrs, data.getAttributes (), tagAttributes, suffix));
 		
 		if ((node.getChildNodes () == null) &&
-		    ((data == null) || data.display ().equals ("")))
+		    ((data == null) || (data.display () == null)))
 		  {
 		    // Close the tag.
 		    result.append (" />");
@@ -547,9 +547,11 @@ public class Presenter
 		  {
 		    result.append ('>');
 		    
+		    // CHANGED, cpm:
+
 		    // Insert data.
 		    if ((data == null) ||
-			(data.display ().equals ("")))
+		    	(data.display () == null))
 		      {
 			result.append (processChildren (node, datas, tagsData, webappPath, suffix, errorOutput));
 		      }
@@ -602,7 +604,7 @@ public class Presenter
 		    result.append (processAttributes (attrs, data.getAttributes (), tagAttributes, Integer.toString (nLine)));
 		    
 		    if ((node.getChildNodes () == null) &&
-			((data == null) || data.display ().equals ("")))
+			((data == null) || (data.display () == null)))
 		      {
 			// Close the tag.
 			result.append (" />\n");
@@ -611,9 +613,11 @@ public class Presenter
 		      {
 			result.append ('>');
 			
+
+			// CHANGED, cpm
+
 			// Insert data.
-			if ((data == null) ||
+			if ((data == null) || (data.display () == null))
-			    (data.display ().equals ("")))
 			  {
 			    result.append (processChildren (node, datas, tagsData, webappPath, suffix, errorOutput));
 			  }

test/xid/test/Test.java

@@ -60,6 +60,7 @@ class Test
     return (result);
   }
 
+  public enum MONTHS {JANUARY, FEBRUARY, MARCH, APRIL, MAY, JUNE, JULY, AUGUST, SEPTEMBER, OCTOBER, NOVEMBRE, DECEMBRE};
  
   /**
    *
@@ -68,6 +69,7 @@ class Test
   {
     System.out.println("Automatic test action for Xid!");
 
+
     Data datas;
     IdData tag;