The PCL-XL PPDs, pxlmono.ppd and pxlcolor.ppd, the product name was
"GPL Ghostscript" which could make make printer setup tools list these
PPDs with this name which does not say anything about the PPD, and
even consider the second one as duplicate of the first one (both
libpappl-retrofit and pyppd did this before they received their most
recent improvements).
Now they names are more useful and the PPDs always listed correctly.
*LanguageEncoding: ISOLatin1
*PCFileName: "PXLCOLOR.PPD"
*Manufacturer: "HP"
-*Product: "(GPL Ghostscript)"
+*Product: "(HP Color LaserJet Series PCL 6)"
*cupsVersion: 1.1
*cupsManualCopies: False
*cupsFilter: "application/vnd.cups-postscript 100 gstopxl"
*LanguageEncoding: ISOLatin1
*PCFileName: "PXLMONO.PPD"
*Manufacturer: "HP"
-*Product: "(GPL Ghostscript)"
+*Product: "(HP LaserJet Series PCL 6)"
*cupsVersion: 1.1
*cupsManualCopies: False
*cupsFilter: "application/vnd.cups-postscript 100 gstopxl"