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+=begin
+* Name: opentox.rb
+* Description: Architecture shims
+* Author: Andreas Maunz <andreas@maunz.de>
+* Date: 10/2012
+=end
+
+# This avoids having to prefix everything with "RDF::" (e.g. "RDF::DC").
+# So that we can use our old code mostly as is.
+include RDF
+
+module OpenTox
+
+    # Help function to provide the metadata= functionality.
+    # Downward compatible to opentox-ruby.
+    # @param [Hash] Key-Value pairs with the metadata
+    # @return self
+    def metadata=(hsh) 
+      hsh.each {|k,v|
+        self[k]=v
+      }
+    end
+
+
+    ### Index Structures
+    
+    # Create parameter positions map
+    # @return [Hash] A hash with keys parameter names and values parameter positions
+    def build_parameter_positions
+      unless @parameter_positions
+        @parameters = parameters
+        @parameter_positions = @parameters.each_index.inject({}) { |h,idx|
+          h[@parameters[idx][DC.title.to_s]] = idx
+          h
+        }
+      end
+    end
+
+
+    ### Associative Search Operations
+    
+    # Search a model for a given parameter
+    # @param[String] The parameter title
+    # @return[Object] The parameter value
+    def find_parameter_value(title)
+      build_parameter_positions
+      res = @parameters[@parameter_positions[title]][OT.paramValue.to_s] if @parameter_positions[title]
+      res
+    end
+
+end