topic IFC | "Classification Reference" field in Archicad 21 in Collaboration with other software

IFC | "Classification Reference" field in Archicad 21

davdelven — Wed, 03 May 2017 16:13:27 GMT

Hello,

I would wanna ask if the new (AC21) Classification Manager allows to synchronize its data with "Classification Reference" field of the Standard IFC Scheme, which we are using usually applying Predefined Rules or editing XML classification files. (i.e. Uniclass 2015, OmniClass or others).

This link is the new "Classification Manager" on AC21 --> https://www.youtube.com/watch?v=mVjY4UoG7Sw

Custom Element Classification is useful if it matches or synchronizes with Classification Rules, most of them National or International Standards to apply into "Classification Reference" STANDARD FIELD (not custom).

Thanks in advance

Re: IFC | "Classification Reference" field in Arch

stefan — Mon, 08 May 2017 09:49:27 GMT

The default Classification in AC21 is just the main functional classification, regardless of any national or IFC classification with a main tree (Construction Element > Beam, Colum, Slab, Wall...).

You can still apply "Predefined Rules" as before and those arrive into the IfcClassification Reference property set.

You could also set up a new classification according to any national standard, if you wish.

The IFC Property Mapping is still available but now as part of the Translators.
You could then map your own Classification into the necessary IFC Properties via the mapping.

Re: IFC | "Classification Reference" field in Arch

davdelven — Fri, 26 May 2017 09:07:14 GMT

Thanks Stefan.
We'll test it when AC21 arrive at our office.
Meanwhile, we must keep editing XML if our goal is to implement a new or non-listed National or Official Classification System in the Predefined Rules.
keep in touch,
David

Re: IFC | "Classification Reference" field in Arch

stefan — Fri, 26 May 2017 09:10:02 GMT

Graphisoft is preparing a few implementated classification systems for implementation by clients. Not sure which ones, though. I expect something along the lines of Uniclass and Omniclass, but there are (many) others in use all over the world.

Re: IFC | "Classification Reference" field in Arch

davdelven — Sun, 04 Jun 2017 10:53:15 GMT

In this BIM task group of Catalonia (GuBIMCat) , which I am on its board and also member, we wrote a post (as far in Catalan and Spanish) how to implement classification in models, and also how to create your own XML files with other classification systems.

--> http://gubimcat.blogspot.com.es/2016/12/como-gestionar-la-clasificacion-de-un_9.html

Re: IFC | "Classification Reference" field in Arch

stefan — Sun, 04 Jun 2017 10:53:34 GMT

In the videos, many prepared classifications have been hinted at.

The link in the video is only partially operational, but I read Uniclass, Omniclass and some from our region (STABU, BB/SfB).

Downloads not working yet.

I've created one myself, starting from an Excel table and some formulas to put them into an XML structure as expected by the classification XML import/export.

In about 3 hours, I've prepared an XML, merged in my Excel text and did the reparenting back in the Classification dialog. This was for a local classification for social residential projects, widely used by Architect in Belgium. Alas, the majority of this system relates to materials and not elements, so usability is limited for ARCHICAD 21 (which only allows Zones and Elements, not Building Materials or Surfaces to be classified).

Re: IFC | "Classification Reference" field in Arch

davdelven — Mon, 05 Jun 2017 15:49:42 GMT

which video-link ?

Re: IFC | "Classification Reference" field in Arch

stefan — Mon, 05 Jun 2017 21:27:01 GMT

I tried to recall it, but it was a screenshot on Twitter on which I could read the URL.

I'll place it here, but don't shoot me if GS removes it again (as it doesn't seem to be fully ready yet).

http://www.graphisoft.com/downloads/archicad/BIM_Data.html

Re: IFC | "Classification Reference" field in Arch

davdelven — Tue, 06 Jun 2017 12:46:53 GMT

Ah, ok! I already saw this URL following #KCC2017 hashtag last week.
All this little steps towards DATA seem to become something more consistent next months or maybe in AC22.

AC-Grasshopper live connection seems could be our best ally managing more efficiently all this stuff.

Meanwhile... we'll see...

Re: IFC | "Classification Reference" field in Arch

Laszlo Nagy — Sat, 10 Jun 2017 14:27:34 GMT

I think this clip explains the new Classification Systems feature of ARCHICAD 21 pretty well:

https://www.youtube.com/watch?v=mVjY4UoG7Sw&list=PLnXY6vLUwlWUdB2RAfevCcWn9tDlGrSq8&index=4

Re: IFC | "Classification Reference" field in Arch

davdelven — Tue, 27 Jun 2017 07:48:41 GMT

Good morning!

Has anyone managed how to mapping into a Custom PSet some sort code from the standard field ifcClassificationReference ?

It turns out that most IFC viewers (except Solibri) do not allow the filtering of the model through the classification field of the IFC standard, so there's no other option than to use custom PSet. In AC21 they have chosen that way, the one of the PSet customised to include the classification field, but without solving its synchronisation with the defining standard field with its Predefined Rules.

Some ideas, avoiding to use another additional XML with the new Classification Manager ?

IFC scheme has its own field to place this information, regardless market IFC viewers don't allow us to use it properly.

Re: IFC | "Classification Reference" field in Arch

davdelven — Thu, 29 Jun 2017 17:40:47 GMT

After some tests... I got a result.
Thanks Stefan for your suggestion of using IFC Type Mapper in the IFC Translator. Although I had to edit choose a "DATA CONVERSION" option to allow exporting "Classification as ifcClassificationReference".

The only thing I still don't get it is to automate without user action, the "classification" info box option, switching on the desired classification system to be exported on each element.

I would like to avoid "dumb users" , who sometimes don't use "favorite tool" for modelling, not to do any action to classificate.

Any suggestion to automate this final "step" ?