Jean-Marc Lasgouttes wrote:
As far as I understand, the main point is to have the preview, right?
Since this does not use the file conversion
stuff from insetexternal, I'd prefer indeed to have InsetPreview (or
preview of ert) for these kind of uses.
I am not sure we want to advertise many ways of basically doing the
same thing.
It might (just might) be for different use-case scenarios: if you have
those very long, specially formatted equations, which you want to keep
into their separate files (perhaps also for avoiding to modify them by
mistake -- or because they're generated by some sort of scripting who
knows from where), then you may want to insert them as external material.
If, instead, you're fine having that in the .lyx file, then you would
use InsetERT.
I know one might use anyway an InsetERT which contains a simple
"\input{myformula}", but I don't know whether it would be a problem or
not the fact that LyX would be unaware of the reference to the external
file (e.g., it should be copied into the tmp foldere while compiling
etc...).
T.