Introduction
1.1 Overview of methods for defining multi-string BWT
1.2 Multi dollar BWT
1.3 Our contributions
1.4 What is not covered
1.5 Overview
2 Preliminaries
3 BWT variants for string collections
3.1 The effect of adding separator symbols
3.2 Interesting intervals
4 Permutations induced by separator-based BWT variants
4.1 Permutations on multisets
6 Experimental results
7 Conclusion