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--- On Fri, 5/11/12, Andreas Säger <> wrote:

From: Andreas Säger <>
Subject: [libreoffice-users] Re: HOWTO change all-user default file formats (Windows), for LOo3.5?
Date: Friday, May 11, 2012, 7:01 AM
Am 11.05.2012 10:47,
Hi Tom,

Thanks for the quick reply.  I probably wasn't
clear enough about the goal being that any users added to
the machines (post facto) would get MS
default formats without doing (knowing how to do)
anything.  (I was recently excoriated by a client who
had difficulty because her customers couldn't open the
.odt's LOo gave her....)

Thanks again,

It is somewhere in the options but you must not do that.
Always edit your documents in the native ODF format (odt,
ods, odp etc) in order to get most of the software and the
best conversion results.
Then you call menu:File>Send>"Document As PDF" and
everybody will be able to read an exact virtual print of
your document since everybody has some PDF reading software
on any computer platform.

*If and only if* you need to co-edit some document with
users of Microsoft Office you call
menu:File>Send>"Document AS MS ..." which keeps your
ODF document while attaching a MS version to an email.
Next time you get mailed the next version of some MS file
open that file and save your copy in native ODF in your own
working directory.
In this scenario you have to strictly avoid the new OOXML
document formats (docx, xlsx and pptx). LibreOffice stores
well formed documents in the older doc/xls/ppt formats while
these formats are fully supported by MS office. The
conversion to doc/xls/ppt works best when it is done in one
go. Working in foreign file formats (saving as doc every few
minutes) may cumulate conversion flaws.

Hope this helps.

Yes, but in the sense of raising an unanticipated problem if it's still
true for recent versions of LOo.  In the preferences it's possible (under
"Load/Save") to make docx/xlsx/pptx the user default formats.  iirc that was also mentioned in the 
November thread.  So what you're saying is that LOo lets users put themselves into "error prone 
mode" without, e.g. a warning box or better still a parenthetic warning in the menu selection, even 
though it will sometimes (iirc) gives a warning about saving individual files in some foreign 

Without knowing under-the-hood details (thus potentially in ignorance) it would seem that a 
container/metafile-type format that appends odX or additionally saves and locally associates odX 
with foreign formats would be a much better solution that preserves odX format advantages and 
consistency versus cumulated errors but lets users work transparently with whatever format they 
prefer.  If the conversion is being done anyway the main overhead delta would be additional 
disk-writes and disk space (negligible compared to videos....)


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