Some information I found here
here, the rest was discovered by reverse engineering the database.
The following query to the database (we use MySQL 5.x, if it matters)
SELECT DISTINCT q1.parent_qid, q1.qid,
q2.type AS parent_type, q1.type AS type
FROM panel_questions AS q1
LEFT JOIN panel_questions AS q2
ON q1.parent_qid = q2.qid
ORDER BY qid, parent_qid
gives the following result
. Subquestions with qid<=875 have the same types as their parent questions (M->M, F->F), but later all subquestions have type T.
I tried this with LimeSurvey 1.92+ and 1.91+ Build 11804 - both give the same result.
