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Naming conventions can be found here: http://wiki.ros.org/Names

Naming conventions can be found here: http://wiki.ros.org/Names

1.1.1 Valid Names

A valid name has the following characteristics:

  1. First character is an alpha character ([a-z|A-Z]), tilde (~) or forward slash (/)

  2. Subsequent characters can be alphanumeric ([0-9|a-z|A-Z]), underscores (_), or forward slashes (/)

Your name starts with a "/" and then consists of alphanumeric charactes, so it's a valid topic name.