[Dev-luatex] user_defined whatsits

[Hans Hagen]

On 9-9-2010 1:14, Patrick Gundlach wrote:
> Hi,
>
> once in a while I find surprises in the luatex reference manual, such as the user_defined whatsits (great!).
>
> 1) Is the user_id field completely up to me? So I can use it somewhat as an attribute?

yes

> 2) Will the user_defined whatsit stay in LuaTeX (I know, nothing is fixed, but the developers might have a tendency)

yes

> 3) am I dreaming or is this really real?

yes

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