1. BS EN 61158-6-18:2012 Industrial Communication Networks - Fieldbus Specifications - Part 6-18: Application layer protocol specification - Type 18 elements

2. BS EN 61158-6-19:2014 Industrial communication networks - Fieldbus specifications - Part 6-19: Application layer protocol specification - Type 19 elements

3. BS EN 61158-6-20:2014 Industrial communication networks - Fieldbus specifications - Part 6-20: Application layer protocol specification - Type 20 elements

4. BS EN 61158-6-21:2012 Industrial Communication Networks - Fieldbus Specifications - Part 6-21: Application layer protocol specification - Type 21 elements

5. BS EN 61158-6-2:2014 Industrial communication networks -Fieldbus specifications - Part 6-2: Application layer protocol specification - Type 2 elements

6. BS EN 61158-6-22:2014 Industrial communication networks - Fieldbus specifications - Part 6-22: Application layer protocol specification - Type 22 elements

7. BS EN 61158-6-23:2014 Industrial communication networks - Fieldbus specifications - Part 6-23: Application layer protocol specification - Type 23 elements

8. BS EN 61158-6-24:2014 Industrial communication networks - Fieldbus specifications - Part 6-24: Application layer protocol specification - Type-24 Elements

9. BS EN 61158-6-3:2014 Industrial communication networks -Fieldbus specifications - Part 6-3: Application layer protocol specification - Type 3 elements

10. BS EN 61158-6-4:2014 Industrial communication networks -fieldbus specifications - Part 6-4: Application layer protocol specification - Type 4 elements