You want to use the "copy" format:
https://openbabel.org/docs/dev/FileFormats/Copy_raw_text.html

e.g.
obabel infile.sdf -O outfile.sdf -ocopy -f 1 -l 1000 

Hope that helps,
-Geoff

---
Prof. Geoffrey Hutchison
Department of Chemistry
University of Pittsburgh
tel: (412) 648-0492
email: geo...@pitt.edu
twitter: @ghutchis
web: https://hutchison.chem.pitt.edu/

> On Jan 31, 2019, at 2:44 PM, gehtalles <toz...@t-online.de> wrote:
> 
> I got a massive SDF file with some 300k structures I need to split into
> smaller files
> 
> I tried 
> 
> babel infile.sdf -isdf -osdf -f 1 -l 1000 -O outfile.sdf
> 
> but all meta data defined in 
> 
>> <data name>
> data content
> 
> are discarded in the outfile.
> 
> Is there an option I missed to include them in the new file?
> 
> 
> 
> --
> Sent from: http://forums.openbabel.org/General-discussion-f3090658.html
> 
> 
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