The 2015 RDA Print Revision contains:

• A full accumulation of RDA—the revision contains a full set of all current RDA instructions. It replaces the previous version of RDA Print rather than being an update packet to that version. Numerous changes to the text of RDA have been made since the publication of the 2014 Revision. Cataloging practice described by RDA has not altered dramatically due to these changes, but over a significant number of the pages in RDA Print were affected by the changes, making an RDA Print update packet impracticable.
• The most current RDA—the revision contains all changes to RDA up to and including the 2015 RDA Update approved by the JSC. There are two types of changes to RDA that routinely take place—“Fast Track” changes and RDA Updates. The JSC periodically issues Fast Track changes to RDA to fix errors and to clarify meaning. These changes do not typically change cataloging practice as described by RDA. An RDA Update is issued annually. In an Update process the JSC considers proposals to enhance and improve RDA as a cataloging standard. An Update can and often does change the cataloging process described in RDA. The 2015 Revision includes all Fast Track changes and RDA Updates since the 2014 publication of RDA in August 2014.