source-to-target.taslx

namespace ex http://example.com/

map ex:a <= ex:0 (x) => {
  ex:a/a <= {
    ex:a/a/a <= x / ex:0.0 / ex:0.0.0
  }
  ex:a/b <= x / ex:0.1 % ex:a/b/b
}

map ex:b <= ex:1 (y) => {
  ex:b/a <= y / ex:1.0
  ex:b/b <= y / ex:1.1
}