diff --git a/plugins/mezuro/lib/kalibro/model.rb b/plugins/mezuro/lib/kalibro/model.rb
new file mode 100644
index 0000000..e96e083
--- /dev/null
+++ b/plugins/mezuro/lib/kalibro/model.rb
@@ -0,0 +1,41 @@
+class Kalibro::Model
+
+  def initialize(attributes={})
+    attributes.each { |field, value| send("#{field}=", value) }
+  end
+ 
+  def to_hash
+    hash = Hash.new
+    fields.each do |field|
+      field_value = send(field)
+      hash[field] = convert_to_hash(field_value)
+      if field_value.is_a?(Kalibro::Model)
+        hash = {:attributes! => {}}.merge(hash)
+        hash[:attributes!][field.to_sym] = {
+          'xmlns:xsi'=> 'http://www.w3.org/2001/XMLSchema-instance',
+          'xsi:type' => 'kalibro:' + xml_class_name(field_value)  }
+      end
+    end
+    hash
+  end
+
+  protected
+
+  def fields
+    instance_variable_names.each.collect { |variable| variable.to_s.sub(/@/, '').to_sym }
+  end
+
+  def convert_to_hash(value)  
+    return value if value.nil?
+    return value.to_hash if value.is_a?(Kalibro::Model)
+    value
+  end
+
+  def xml_class_name(entity)
+    xml_name = entity.class.name
+    xml_name["Kalibro::"] = ""
+    xml_name[0..0] = xml_name[0..0].downcase
+    xml_name + "Xml"
+  end
+
+end
--
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