how to export alg,ird? or merge from 3d to 2d

I know that you can export alignments and other features to LandXML. They could then be imported into a different file.
I'm not sure corridors can be exported as anything (while still retaining all the rules and definitions). Those may need to be recreated.

You are correct, MaryB. The rules. etc. are bound to have been destroyed; the relationships were quite unknown before. 

Mark

You are correct, MaryB. The rules. etc. are bound to have been destroyed; the relationships were quite unknown before. 

Mark