For data passes we make use of LPE modifiers, nothruput;noinfinitecheck;noclamp;unoccluded; you can find these at the bottom of the LPE page, for the purposes of this document you should pay most attention to the part of the LPE that begins with the camera (C) as it is used to define the path collected. The rest is included for completeness.

• unoccluded – returns unoccluded or unshadowed result.
• noclamp – returns unclamped result.
• nothruput – does not apply thruput (thruput is the accumulative albedo of the objects hit by rays).
• shadows – returns collected shadows.
• holdouts – returns only holdout light paths (light paths with one or more holdout events)
• overwrite – instead of outputting the accumulated result, overwrite it. One example of using this is for the albedo output where we do not want an accumulated result.
• noinfinitecheck – do not do any infinite check.