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+opustags
+========
+
+View and edit Opus comments.
+
+Installing
+----------
+
+    make
+    make DESTDIR=/usr/local install
+
+Documentation
+-------------
+
+    Usage: opustags --help
+           opustags [OPTIONS] FILE
+           opustags OPTIONS FILE -o FILE
+
+    Options:
+      -h, --help              print this help
+      -o, --output            write the modified tags to a file
+      -y, --overwrite         overwrite the output file if it already exists
+      -d, --delete FIELD      delete all the fields of a specified type
+      -a, --add FIELD=VALUE   add a field
+      -s, --set FIELD=VALUE   delete then add a field
+      -D, --delete-all        delete all the fields!
+      -S, --set-all           read the fields from stdin
+
+See the man page, `opustags.1`, for extensive documentation.