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That would be remapping.

See roslaunch/XML/remap for .launch files and Remapping Arguments for nodes and a more general description.

Finally, refer to #q303611 for additional discussion.

That would be remapping.

See roslaunch/XML/remap for .launch files and Remapping Arguments for nodes and a more general description.

Finally, refer to #q303611 for additional discussion.

Edit: and whatever you do: do not edit source code to change topic names. That is almost always unneeded and very much an anti-pattern.

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