[NTG-context] expansion inside PDF annotations

[Pablo Rodriguez]

Dear list,

I have the following sample:

    \setupinteraction[state=start]
    \starttext
    \startTEXpage[offset=1em]
    Attached on \currentdate.
    \attachment
        [http://pragma-ade.com/general/manuals/xtables-mkiv.pdf]
        [author={Attached on \currentdate},
         title={Attached on \currentdate}]
    \stopTEXpage
    \stoptext

How can I get \currentdate expanded in the PDF annotation?

Many thanks for your help,

Pablo
-- 
http://www.ousia.tk