Validation check for an item

Question

I am not sure about how to use regular expression for a validation check for an Item
I might need to check for an item for the below format -
1 , XXX-XXXXX-## ( "3 alphanumeric" , "middle score" , "5 alphanumeric" , "2 digit year" )
2, XX##-### ("2 alphabets ", "2 digit number", " middle score ",3 digit number

Answer 1

Lucy,
Create an item level validation of type regular expression, and use the following for the respective Regular Expression values:
1) ^[[:alnum:]]{3}-[[:alnum:]]{5}-[[:digit:]]{2}$
2) ^[[:alpha:]]{2}[[:digit:]]{2}-[[:digit:]]{3}$I'm only very new to regular expressions, so I welcome being corrected if there's a more efficient way of declaring this. But this works.
Anthony.