Index: trunk/doc/user/01_intro/history.html
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 as the plugin system, the I/O (file format support) subsystem and even the
 data model pcb-rnd operates on.
 <p>
+Between 2017 and 2019 pcb-rnd got a major data model redesign. The resulting
+data model is generic and flexible, capable of representing most details
+imported from alien file formats.
+<p>
 pcb-rnd is part of the ringdove EDA suite.
 <p>
 A more complete history can be found in the