Require input length for entity primary key

[markjw]

0000000000 should work

0 Digit, required. This element will accept any single digit between 0 and 9.

Entity Custom Data Field Formatting Masks

##Entity Custom Data Field Format using Masks## 0 Digit, required. This element will accept any single digit between 0 and 9. 9 Digit or space, optional. # Digit or space, optional. If this position is blank in the mask, it will be rendered as a space in the Text property. Plus (+) and minus (-) signs are allowed. L Letter, required. Restricts input to the ASCII letters a-z and A-Z. This mask element is equivalent to [a-zA-Z] in regular expressions. ? Letter, optional. Res…