https://www.dotnetzone.gr:443/cs/blogs/abekiaris/archive/2009/12/08/sneak-peak-gt-worldcreator2-with-scripting-and-templating.aspxBased on the specs i posted here , I have created a working prototype In the video bellow I demo how you can model a classic Customer-Orders relationship at runtime modify the template of Orders property to create also a new custom readonly property thatelCommunityServer 2.1 SP3 (Build: 20423.1)