Hello, I'm not sure that is something that should Here's an example for you: are 4 lines: 1) my string n1 2) my string n2 3) my string n3 4) my string n1 when added to the database, should only add a line under the numbers: 1, 2, 3 Line number 4, is not unique, it is the same as a string of number 1 how to do it in xapian?