Find duplicate works

Use this tool to list works in a CWR file that look like the same work. CWR (Common Works Registration) is the text format publishers use to register works with collecting societies.

Your file is never uploaded. The tool only reads your file. It changes nothing.

How it groups works

The tool puts works in a group when they share one of these:

A work with no named writer is not grouped by title. A work can appear in more than one group.

A group is a guide, not a rule. An NWR and the REV that revises it share a number on purpose. The checker also reports a repeated Submitter Work # as a problem (NWR-F-003).

Steps

1. Open the Tools tab and select "Find duplicate works".
2. Read the summary. It says how many groups the tool found in how many works, or that it found none.
3. Read each group. Its heading gives the reason, such as "Same ISWC" or "Same title and writers". Each work in the group shows its line and title.
4. Select "Show in file" on a work to jump to its line. The work's header carries the label "Possible duplicate" while the group is open.
5. Decide which works to keep. Check the list before you act on it.
6. To make a file without the repeats, select "Extract without the later copies" on a group, or "Extract without every later copy" for the whole list. The extract tool opens with every work chosen except the later copies.

If a group lists many works, the tool shows the first ones and says how many remain.

Choices to check

• Some groups pair an NWR with the REV that revises it. Leaving out the REV may not be what you want.
• The tool keeps the earliest work in each group and leaves out the later ones. Confirm that the earliest is the one you want.

What to check next

1. Fix a repeated work number at its source, or extract without the later copies. See Extract works.
2. Check the new file in the CWR checker.