Next the entire set of words contained in the name fields were parsed into individual words. These lists were given to the data custodians to mark the preferred form. The codebook maintains a series of names for each unit or entity, ranging from 5 characters in length to 86. Link the extracts by appropriate codes and limit each to 'Y' in the current field. For historical information limit the effective and termination date fields appropriately.
Current records have effective and termination dates that bracket the date the table was produced.
Occasionally records are added to the codebook database in advance. Both the effective and termination dates must be used to determine whether a unit or entity is current. The CurrentFlag field was added to address this concern. Limit the effective date to less than or equal to the date in question and the termination date too greater than the date in question. Actually, the simplest thing to do is email the appropriate member of the codebook analysis team with as much information on the nature of the mistake, its location, how you know the data is incorrect, and what it should be.