Page count and serial number attributes?

Hello,

I was inquiring about receiving page counts (BW or Color) attributes 
from a printer supporting IPP version 2.

I have tried printer-pages-completed but apparently my printer does not 
support this as it does not return a value.

I have seen a job-impressions-completed, job-media-sheets-completed, and 
a job-pages-completed but assumed these were

job specific? Also, is there a printer-serial-number attribute in IPP 
version 2?


Thanks