my understanding of missing value indicators is that they are essentially qualifiers that can be added to a given field. we have a list of animal birthdays, some of which are estimated. is this an example where using a missing value indicator of 'estimated' (or 'E') would make sense? it's not really missing per se, but it is a qualification of the field value.
jeckels responded:
2010-04-28 08:44
Hi Ben,
Yes, this sounds like a good case for using missing value indicators. You have a value, but it's not completely trustworthy, so you can flag it as such.