I do not understand the workings of the itemize.
What I want is two nested itemlists. The outer one unpacked, the inner one packed. In the inner one the itemlist should be joinedup with the text before it.
I do not get this working, see the examples. The inner list is separated from the "Intro to inner list". It looks like the joinedup in the second example has no effect, because deleting it makes no difference. Switching the joinedup over to the outer itemize in the third example pulls everything together and destroys the unpacked of the first list.

How to achieve the following?
----------------------------------
- Intro to inner list
  o one inner list
  o two inner list

- second outer item
----------------------------------

Hans van der Meer

\starttext
\setupitemgroup[itemize][1][unpacked][symbol=4]
\setupitemgroup[itemize][2][unpacked][symbol=5]
\startitemize
\startitem
Intro to inner list.
\startitemize
\startitem one inner list \stopitem
\startitem two inner list \stopitem
\stopitemize
\stopitem
\startitem second outer item \stopitem
\stopitemize
\blank\thinrule\blank
\setupitemgroup[itemize][1][unpacked][symbol=4]
\setupitemgroup[itemize][2][packed,joinedup][symbol=5]
\startitemize
\startitem
Intro to inner list.
\startitemize
\startitem one inner list \stopitem
\startitem two inner list \stopitem
\stopitemize
\stopitem
\startitem second outer item \stopitem
\stopitemize
\blank\thinrule\blank
\setupitemgroup[itemize][1][unpacked,joinedup][symbol=4]
\setupitemgroup[itemize][2][packed][symbol=5]
\startitemize
\startitem
Intro to inner list.
\startitemize
\startitem one inner list \stopitem
\startitem two inner list \stopitem
\stopitemize
\stopitem
\startitem second outer item \stopitem
\stopitemize
\stoptext