extrac specific number values from tcl file
===

I would like to read specific value numbers and compare them from a file in tcl .. for example:
node4 time: 3.03 PositionX :34.596   PositionY: 200.34
node5 time: 6.02 PositionX :4.50   PositionY: 30.234
>I need to read **ONLY** the node number 'like' node4 and 3.03 and 200.34 as well
and _so_ on for each line then print them or compare them later  .. ?? How I can do that in tcl ?
Thanks in advance 