(Teresa's note:  I also use B: for people born too late to be on a census, and D: for people who died before a census)

The way I use these flags is set up a series of filters to set the various
flag settings. I start by eliminating anyone who was born after the census
data or died before the census data by setting their flag to an "X".

(Teresa's note: This is where I would use my B and D)

The filters for the LOP are as follows:

1930 census flag set to X

( Birth Group... Date > Comes After 01 Apr 1930 AND

Birth Group... Date Is Not Empty ) OR

( Death Group... Date < Comes Before APR 1930 AND

Death Group... Date Is Not Empty AND

Death Group... Date <> Does Not Equal 1930 ) OR

( Burial Group... Date < Comes Before APR 1930 AND

Burial Group... Date Is Not Empty AND

Burial Group... Date <> Does Not Equal 1930 ) END

The secondary output for the LOP is to set the Census1930 flag to "X".

With these people eliminated I next set the flag for individuals who should
be considered. The was accomplished by the use of three separate flags, one
which found individuals who had events (tags) before and after the census
date, one to find anyone born within 100 years before the census date and on
e to find anyone who died within 100 years after the census date. Remember I
have already eliminated those who died before or were born after the census
date. These filters are as follows:

1930 census candidate before and after
    Any Event...    Date        < comes before    02 Apr 1930    AND
    Any Event...    Date        > comes after       01 Apr 1930    AND
    Any Event...    Country   Contains               USA                AND
    Census1930#1                 = Equals             ?                      END

1930 census candidate birth
    Birth Group...    Date        < Comes before    02 Apr 1930    AND
    Birth Group...    Date        > Comes after       01 Apr 1830    AND
    Any Event...      Country    Contains               USA               AND
    Census1930#1                   = Equals               ?                    AND
    Death Group      # of tags   < is less than        1                    END

1930 census candidate death
    Death Group...    Date        > Comes after      01 Apr 1930     AND
    Death Group...    Date        < Comes before   01 Apr 2030     AND
    Any Event...       Country    Contains               USA               AND
    Census1930#1                    = Equals               ?                   AND
    Birth Group       # of tags   < is less than         1                  END

For each of these three filters the secondary output for the LOP is to set
the Census1930 flag to "Y"

You now have a flag for all of the candidates that you want to check in the
1930 census. Now you need a way to determine if they already have been found
on the original images. I have tags for each census year named Censusxxxx,
where xxxx is the census year. For this you use the following filter: (NOTE:
The Census1930 in the following filter is a tag, not a flag)