Index: 02_data.html
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--- 02_data.html	(revision 107)
+++ 02_data.html	(revision 108)
@@ -54,7 +54,14 @@
 the electrical connection between the <i>port</i> of the gate and other
 <i>ports</i> in the circuit.
 
+<p>{des2:56}
+Each <a href="01_system.html#des1:21">view</a> has its own <i>abstract</i>
+object model, generted by different set of plugins with different
+configuration from the same <i>concrete</i> model. Since views are
+independent, the pre view <i>abstract</i> models are independent too.
+The <i>abstract</i> models are generated on the fly and are not saved.
 
+
 <h2> 2.3. <i>Concrete:</i> graphical schematics sheets </h2>
 
 <p>{des2:8}