diff --git a/bin/validate2.rb b/bin/validate2.rb
index b703a84..2647dba 100755
--- a/bin/validate2.rb
+++ b/bin/validate2.rb
@@ -1,24 +1,57 @@
 #!/usr/bin/ruby
 
 require 'libxml'
+require 'libxslt'
 
 include LibXML
-
-# TODO make the namespace prefixes transparant
+include LibXSLT
 
 XML::Parser::default_line_numbers=true
 
-results_doc = XML::Document.file('output.xml')
-instance_doc = XML::Document.file('instances/Example2.xml')
+def transform(stylesheet, instance)
+
+  # Build the stylesheet
+  stylesheet = XSLT::Stylesheet.new case stylesheet
+                                    when LibXML::XML::Document 
+                                      stylesheet
+                                    when String
+                                      XML::Document.file stylesheet
+                                    end
+
+  # Transform the instance
+  stylesheet.apply case instance
+                   when LibXML::XML::Document
+                     instance
+                   when String
+                     XML::Document.file instance
+                   end
+end
+
+def validate(sch, instance)
+  p1 = transform 'iso_dsdl_include.xsl', sch
+  p2 = transform 'iso_abstract_expand.xsl', p1
+  p3 = transform 'iso_svrl.xsl', p2
+  transform p3, instance
+end
+
+# TODO make the namespace prefixes transparant
+
+instance_doc = XML::Document.file '../instances/Example2.xml'
+results_doc = validate '../sch/fda_sip.sch', instance_doc
 
-locations = results_doc.root.find('//svrl:failed-assert').map do |assert|
-  i_node = instance_doc.root.find_first assert['location']
+errors = []
+results_doc.root.find('//svrl:failed-assert').each do |assert|
+  context = instance_doc.root.find_first assert['location']
 
   assert.find('svrl:text/text()').each do |message|
-    puts '%s "%s" on line %d: %s' % [i_node.node_type_name, 
-                                     i_node.name, 
-                                     i_node.line_num,
-                                     message.content.strip]
+    errors << '%s "%s" on line %d: %s' % [ context.node_type_name,
+                                           context.name, 
+                                           context.line_num,
+                                           message.content.strip ]
   end
 
 end
+
+errors.each do |error|
+  puts error
+end
diff --git a/instances/Example2.xml b/instances/Example2.xml
index fdb343e..8df14fd 100644
--- a/instances/Example2.xml
+++ b/instances/Example2.xml
@@ -21,7 +21,7 @@
   <!-- must have checksum, checksum type & file location  -->
   <fileSec>
     <fileGrp>
-      <file ID="file-1" CHECKSUM="259c4fabf48fd8fa664fb7123e4706c3" CHECKSUMTYPE="MD5">
+      <file ID="file-1" CHECKSUM="259c4fabf48fd8fa664fb7123e470624" CHECKSUMTYPE="MD5">
 	<FLocat LOCTYPE="URL" xlink:href="xxx/content_file_1"/>
       </file>