I am editing a longtable. Some of my cells contain a lot of text. Page breaks seem to happen only where table rows end/begin. I'd like, however, for the rows to span pages; it's fine with me if, for example, the first few lines of a row are at the end of one page and the rest of the row's lines are on the next page.
pagebreaks inside a cell are in general not possible but you can work with a trick if you really need a break. However, it makes no sense if you have a lot of such tables or pagebreaks.
Set the long table as usual and have a look into the pdf output of the cell where a pagebreak maybe usefull. Now insert in that cell at the last word of that line
first col & ... some text\parfillskip=0pt \tabularnewline & and the follwing text which is on the next page.
\parfillskip=0pt you'll get a left and right justified line.