# I agree totally. However, there are many different groups and communities looking at the sustainability issue, and it is understandable...

Commenting post [279](/?blog/2016-279): I agree totally. However,
there are many different groups and communities looking at the
sustainability issue, and it is understandable that some of them don't
want the "bulky" thing that IFC is, they prefer a format tailored
specifically to the task, like GBXML. And I also think it does good to
FreeCAD not to "mold" itself to IFC (that would be the equivalent to
speaking only one language) but to be compatible with several formats
and paradigms. So in that regard working with GBXML makes sense... Of
course nothing prevents us from supporting IFC's equivalent too