[Orgmode] Notes reviews with sparse trees

[Giorgio Valoti]

Hi,
since I started using Org I collected a bunch of notes in a journal file and 
I’d like to review them on a regular schedule. Ideally, I’d like to mark a 
given entry with a review timestamp so I can skip it the next I review the 
journal file and then use a sparse tree to see only the notes that I haven’t 
reviewed in a while. 

The problem is that I can’t get a sparse tree using these timestamps because it 
works only with deadlines and schedules. Does anybody know how to work around 
this limitation, short of using a regexp?

Thank you in advance
--
Giorgio Valoti