Linked PDF's not working when exported to IFC

Question

Hi, 
 In building designer model we have linked our section/elevation/plan/detail call-outs to PDF drawings. 
 So when you click on a call-out it opens the PDF. 
 However, when we export to IFC there are no callouts that open PDFs. 
 Does anybody know why this might be the case? 
 I.e. Does the building designer file need to be collated or packaged in some way prior to exporting to IFC format? 
 Any help much appreciated.

Steve Cocchi · Accepted Answer

I don't think there's much to add AFAIK. When using Solibri as an IFC viewer it requires modification outside of what the source application (ABD in this case) can provide. IOW, there is apparently no means to include that data just by exporting an IFC file. I'd imagine it's similar with other viewers as well, though I'm not sure how well links are supported in general when it comes to IFC. 
 
Is this related to your thread regarding linking pictures to columns?

Marc Thomas · Answer

IFC is not designed to support proprietary DGN features like our callout links. 
 You may be able to add an approriate internet URL accessing PDF (if the PDF can be accessed via a URL) as a value of an appropriate property, if there is one.