DBCP
----

Reviewers agreed this was an excellent and very useful compilation.  (Note
that SBN made some minor format changes to align comet name fields with 
the usual conventions for SBN comet data sets, and to add MISSING_CONSTANTS
in fields that clearly had missing values.)

o  Add a MISSING_CONSTANT value for the diaphragm column in the main data 
   table.

o  Diaphragm values of "0.0" should be changed to something reasonable,
   where possible, or to a MISSING_CONSTANT flag value where not.

o  Diaphragm in kilometers (column 10) should be converted to a strictly
   numeric column.  (Add a second column to hold a second dimension where
   appropriate.)

o  The values in the offset column (column 11) should be made more uniform, 
   if possible.  For example, convert to the same units and move text 
   descriptions into a separate column.

o  If possible, provide both direction and distance of offsets.

o  The term "degree of polarization" should be replaced with "percent
   polarization" in the column names and file descriptions (because it 
   looks like percent polarization is the value actually provided).

o  The are linear polarizations << -1%, which seems wrong.  Is this, perhaps
   a typographical error?  If not, please add a note of explanation (in the
   data set description or the column description, or both).

o  Please add more detailed definitions of the angles mentioned - for example,
   in columns 14 (position angle), 18 (phase angle) and so on.

o  The data set description says there are 68 references included, but there
   are only 56 references in the reference list.

o  References in the data file do not always match references in the
   reference list in format, making it hard to search for one in the other.

o  In the data set description, please describe what is meant by "completeness"
   in this case.  What criteria were used to select or exclude data from this
   compilation?

o  The data set description should give the date range as "1940 to 2005", to 
   indicate to the user when the last update was completed.

o  Please provide a more explicit definition of "linear polarization" in the
   context of this collection, including the reference plane used to define
   the Stokes parameters.

o  Please provide a more explicit definition of "circular polarization",
   including how the handedness is defined.

o  If possible, include URLs or contact information in the reference list for
   those data listed as "unpublished".

o  Please split the main data table into two separate tables: one for published
   data and one for unpublished data.

o  Please split the filter/band column (column 8) into two separate columns:
   a numerical column with effective wavelength and a character column with 
   the band name.