https://community.graphisoft.com/t5/Collaboration-with-other/Classification-reference/m-p/230782#M29539 <DIV class="actalk-migrated-content"><T>Hi all,<BR /> I've just realised AC22 has the option to create Classification References in the IFC Project Manager.<BR /> Anyone knows what they are for ? Help shows us how to create them but I can't see the purpose...</T></DIV> Wed, 08 Aug 2018 07:08:19 GMT felcunha 2018-08-08T07:08:19Z https://community.graphisoft.com/t5/Collaboration-with-other/Classification-reference/m-p/230782#M29539 <DIV class="actalk-migrated-content"><T>Hi all,<BR /> I've just realised AC22 has the option to create Classification References in the IFC Project Manager.<BR /> Anyone knows what they are for ? Help shows us how to create them but I can't see the purpose...</T></DIV> Wed, 08 Aug 2018 07:08:19 GMT https://community.graphisoft.com/t5/Collaboration-with-other/Classification-reference/m-p/230782#M29539 felcunha 2018-08-08T07:08:19Z https://community.graphisoft.com/t5/Collaboration-with-other/Classification-reference/m-p/230783#M29540 This means that you can create a custom IFC Property and the values and fields of that IFC Property will come from a Classification, such as Onmiclass, Uniformat, etc.<BR /> <BR /> However, since the Classification Manager was introduced in ARCHICAD 21, it is a better solution to use the Classification Manager to create such Classifications, since any element can have any number of Classifications, according to various Classification Systems.<BR /> <BR /> As a general direction, with the introduction of the Property Manager and the Classification Manager, GRAPHISOFT made it unnecessary to create custom IFC Properties since you can do them in the Property Manager and the Classification Manager. Thu, 09 Aug 2018 17:24:18 GMT https://community.graphisoft.com/t5/Collaboration-with-other/Classification-reference/m-p/230783#M29540 Laszlo Nagy 2018-08-09T17:24:18Z