help additem

ADDITEM <in_info_file> <out_info_file> <item_name> <item_width> <output_width>
        <item_type> {decimal_places} {start_item}
 
adds a blank or zero item to an INFO data file.
 
arguments
 
<in_info_file> - the INFO data file to which the item is to be
added.
 
<out_info_file> - the INFO data file containing the added item.  If
<out_info_file> already exists, it will be replaced.
 
<item_name> - the item to be added.
 
<item_width> - the INFO width of the added item.
 
<output_width> - the INFO output width for the added item.
 
<item_type> - the INFO item type for the added item.
 
{decimal_places} - the number of decimal places for the added item.  This needs
to be specified for INFO item types N and F.
 
{start_item} - the item in <in_info_file> after which the new item is to be
added.  The default {start_item} is the last item in <in_info_file>.  $RECNO,
the pseudo item for record, can be used as the {start_item} in nonfeature
attribute tables.
 
notes
 
ADDITEM can be used with any INFO data file including files not created
by ARC/INFO commands.  Items which will be used by ARC commands, however, must
have ARC/INFO-compatible definitions.
 
Do not insert items before the cover-ID in a feature attribute table.
 
If <item_type> defines a character, blanks are inserted for each record.  If
<item_type> defines a numeric item, then zeros are inserted for each record.
 
After modifying the VAT of a grid using ADDITEM, INDEXITEM must be used to
index the VAT on the item named VALUE.
 
Adding items to coverage tic files is not recommended.  Negative results may
occur depending on the operation performed on the coverage.  CLEAN, COPY and
other commands will maintain only the original tic items.  To simulate adding
additional tic items to a coverage, create a link to an INFO data file and set
up an ARC relate to that file.
 
discussion
 
ADDITEM creates a new INFO data file that is like the
<in_info_file> except that it has a new item containing blanks or zeros.  Data
in other items are copied from the <in_info_file> to the <out_info_file>.  When
the <in_info_file> and <out_info_file> have the same name, the item is added to
the <in_info_file>.  Otherwise, the <out_info_file> is created as a new
internal INFO data file, and the <in_info_file> is not altered.
 
A new item is often added to an attribute table to hold the results of an INFO
model or to keep a symbol specification for ARCPLOT.  ADDITEM is also used to
add key values for items so that a relate can be performed among two or more
INFO files.
 
A similar ARC command, JOINITEM, adds items by merging two INFO data files.
ADDITEM is different from JOINITEM in that it adds only one item at a time, and
the new item values are always zero or blank.  JOINITEM may be preferable when
many items are to be added from an existing INFO data file.
