The two file are a set python variables(key/value).
Keys are identical in each file in order to create a kind of interface
that can either use variables from one file or the other.
values are queries and indexes.
queries is a list of two sql statement executed to select tutorials with
mandatories and/or forbiden labels.
Inside sqlStmtUser.py ELEMENT table is join to User table but not in
sqlStmt.py. With sqlStmtUser.py result of select have an extra column :
username related to element (e.g. because they are the creator of this
element).