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Is this answer still current? I see that xacro got an upgrade: from http://wiki.ros.org/xacro#Conditional_Blocks "The more powerful evaluation capabilities in ROS Jade allow for much more complex expression. Virtually any python expression that evaluates to a Boolean is feasible."

Is this answer still current? I see that xacro got an upgrade: from http://wiki.ros.org/xacro#Conditional_Blocks "The more powerful evaluation capabilities in ROS Jade allow for much more complex expression. Virtually any python expression that evaluates to a Boolean is feasible."

EDIT 2015.6.30:

I found a related ticket suggesting that Ken's answer is probably still current, though I don't yet have jade to check for sure.

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