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v@P      >>> points 
v@Cd     >>> primvars:displayColor 
f@Alpha  >>> primvars:displayOpacity 
i@id     >>> ids
v@uv     >>> primvars:st // think of STMaps in Nuke
v@N      >>> normals 
v@v      >>> velocities 
v@w      >>> angularVelocities
v@accel  >>> accelerations 
f@width,
f@widths,
f@pscale >>> widths