>Alex Fraser wrote:
>    If you decide on a common file format (and it works), 
then you don't need
>to use the same software to create those files. This file 
sharing would be
>easier of course in 2D which is a shame as 3D is sooooo 
powerful, but better
>2D CAD than 0D CAD.

Having been on many engineering projects with various "file 
formats" I can tell you from experience that such an approach 
is overly fraught with "gotcha's". Even with well established 
industry standard formats an apple is not an apple. In the 
low end of CAD/CAM Autocad's DXF format seems to rule but ... 
even that changes from version to version. Only AutoCad truly 
reads the format other tools interpret the results but do not 
always maintain the original information.
I use TurboCad 7.0 and have imported AutoCad files with 
limited success. Going to AutoCad has it's own quirks.

>From experience: Settle on a specific program for small teams 
and only use that program. The format approach is OK when you 
need to send data to next phase (ie. CAD->CNC conversion) not 
to another designer to modify (Review is usually tolerable).

In general a format forces you into a compromise to a lower 
level of commonality. The tools that "support" the format 
almost always have some other "feature" that gets down 
converted so that other tools can access the information and 
most of this "down conversions" tend to be a compromise on 
data integrity and accuracy.
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