Today , I will discuss about the Regular expression in Pentaho.Below are regex which can be used in Pentaho. There are many more as well. I worked on below Regex , so, I mentioned only those which I have used in the code. The values having only digits : ^[0-9]+$ The values having only lowercase characters : ^[a-z]+$ The values having only uppercase characters : ^[A-Z]+$ The values having only uppercase & lowercase characters : ^[a-z|A-Z]+$ The value having list of vowels characters ^[AEIOU]+$ The value having only these characters…