What's the difference between "laser" and "scan" of tf
<node pkg="tf" type="static_transform_publisher" name="base_link_to_laser"
args="0.0 0.0 0.0 0.0 0.0 0.0 /base_link /laser 50">
</node>
When I write the above. I'm not clear about the names of tf frames, especially for the "laser". Is this argument always like this even if my sensor topic is "/scan" ? Does it mean the frame name is given by a name space and it has no relation to topic names?