I'm seeing a variation and also some questions about adding the dimensions
of the CD-ROM. I note in the BL workflow that their policy is not to record
dimensions of accompanying material.
I did include it, going by 3.1.4 to include details of each carrier type
and then applying the LC-PCC PS for 126.96.36.199.4 which says to give inches for
discs. Actually I dislike this current practice, maybe now is the time to
rethink it (though it's hard to go against LC/PCC practice because it will
cause problems then with downloaded records being in inches).
I abbreviated the "inches" to "in." because 188.8.131.52 on dimensions points
you to appendix B.5.1 and from there to App.B.7 which says that you can
abbreviate inches to in. This seems so illogical though, when we've learned
that RDA means no more abbreviations. We already have the slightly odd
situation of "cm" becuase it's technically not an abbreviation but an SI.
Maybe I'm edging towards thinking we either move to metric dimensions for
everything or we omit dimensions of accompanying material following BL
Cambridge University Library
Cambridge CB3 9DR