Fwd: grace-notes naming and realization?

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Apparantly I forgot the attachment, sorry about that....

> ---- Original Message ----
> From: address@hidden
> To: address@hidden
> Sent: Zon, Sep 2, 2012, 8:04 PM
> Subject: grace-notes naming and realization?
>
> Hi,
>
> I'm trying to typeset a score written by someone else and he uses a figure I don't (exactly) recognize. See attached PNG file.
>  It is played almost seperatedly before the main notes not substracting time of them and it is played even a little bit slower.
>
> It looks like a acciaccatura with a slash in the stem.
>
> 1. Can someone tell me how the figure is called, so I can look it up?
>
> 2. Can we represent this in LilyPond?
>
> Regards,
> Wim.