In Smooks it is possible to use a white space or a slash as selector path separator. Since Smooks 1.1 the slash is preferred by the Smooks developer team because it is more concise to Xpath . But it is off course up to the user to decide which separator they want to use.

Maybe a configuration option could be created to be able to set the selector path separator. This options should be set globally but should be override able per project.

In my opinion (as Smooks development team member ), the slash should be the preferred separator.