Cataloging-in-Publication (CIP) data originates from the Library of Congress. TitleLeaf has various product fields to hold the entirety or segments of that data.
CIP - The entire Cataloging in Publication text Ref
LCCN - Library of Congress Control Number Ref
LC Class - Library of Congress Classification Ref
Dewey - Dewey Decimal Classification Ref
Annotation - A short description the book
To update those fields, the publisher can:
Enter the data through the web admin (this is probably the simplest solution if you only have a couple products to update)
Pull data from LocLOC.gov: Go to the product page, click the "Update" icon above the LCCN "LOC Control Number" field. This process populates the following fields if they are blank: LCCN, LC Class, Dewey, and Annotation. To verify the data beforehand, click the "Library of Congress" link directly above the aforementioned link (in the right sidebar).
External Link" icon next to the "Update" icon.
Use a subset of the products or products-cip template. As with any template, you can delete any non-required columns that aren't relevant to your data set.