I mean in my specific source flat file
0012312 234 Asdee 322 12112 H874 B888 99900 UD
1st level validation would be to check if there are numbers coming in 0012312 place say if i get literals like aaabb something it should reject this data , second level validation would be to check 0012312 corresponds to correct acct number as such, please walk me thru if anybody has did something like this before