I got this message while requesting printer attributes from a TOSHIBA e-STUDIO 525P.
I hope it helps:
The spec is not clear on how to handle tag 18. Please open a github issue to help find a solution!
{ version: '2.0',
statusCode: 'successful-ok',
id: 5819511,
'operation-attributes-tag':
{ 'attributes-charset': 'utf-8',
'attributes-natural-language': 'en-us' },
'printer-attributes-tag':
{ 'compression-supported': [ 'none', 'gzip' ],
'charset-configured': 'utf-8',
'charset-supported': [ 'utf-8', 'us-ascii' ],
'natural-language-configured': 'en-us',
'generated-natural-language-supported': 'en-us',
'color-supported': false,
'copies-default': 1,
'copies-supported': [ 1, 999 ],
'document-format-default': 'application/octet-stream',
'document-format-supported':
[ 'application/octet-stream',
'application/pdf',
'image/jpeg',
'application/postscript',
'application/vnd.hp-PCL',
'text/plain' ],
'document-format-preferred': 'application/pdf',
'finishings-default': 'none',
'finishings-supported': 'none',
'ipp-versions-supported': [ '1.0', '1.1', '2.0' ],
'job-creation-attributes-supported':
[ 'copies',
'finishings',
'ipp-attribute-fidelity',
'job-description',
'job-id',
'job-impressions',
'job-impressions-completed',
'job-k-octets-processed',
'job-media-sheets',
'job-media-sheets-completed',
'job-name',
'job-originating-user-name',
'job-printer-up-time',
'job-printer-uri',
'job-sheets',
'job-state',
'job-state-reasons',
'job-template',
'job-uri',
'job-uuid',
'media',
'media-bottom-margin',
'media-col',
'media-left-margin',
'media-right-margin',
'media-source',
'media-top-margin',
'media-type',
'multiple-document-handling',
'number-up',
'orientation-requested',
'output-bin',
'output-mode',
'page-ranges',
'print-color-mode',
'print-quality',
'printer-resolution',
'sides',
'time-at-completed',
'time-at-creation',
'time-at-processing' ],
'job-media-sheets-supported': [ 1, 2147483647 ],
'job-sheets-default': 'none',
'job-sheets-supported': [ 'none', 'standard' ],
'job-impressions-supported': [ 1, 2147483647 ],
'jpeg-k-octets-supported': [ 0, 131072 ],
'jpeg-x-dimension-supported': [ 1, 32768 ],
'jpeg-y-dimension-supported': [ 1, 32768 ],
'landscape-orientation-requested-preferred': 4,
'marker-colors': '#000000',
'marker-low-levels': 10,
'marker-levels': 28,
'marker-high-levels': 100,
'marker-names': 'Black',
'marker-types': 'tonerCartridge',
'media-supported':
[ 'na_letter_8.5x11in',
'na_legal_8.5x14in',
'jis_b5_182x257mm',
'iso_a4_210x297mm',
'na_executive_7.25x10.5in',
'iso_a5_148x210mm',
'om_universal_216x356mm',
'na_foolscap_8.5x13in',
'na_invoice_5.5x8.5in',
'iso_a6_105x148mm',
'na_foolscap_8.5x13.4in',
'na_monarch_3.875x7.5in',
'na_number-9_3.875x8.875in',
'na_number-10_4.125x9.5in',
'iso_dl_110x220mm',
'iso_c5_162x229mm',
'iso_b5_176x250mm',
'custom_min_98.42x148mm',
'custom_max_216x356mm' ],
'media-ready': [ 'iso_a4_210x297mm', 'iso_a5_148x210mm', 'iso_a4_210x297mm' ],
'media-default': 'iso_a4_210x297mm',
'media-top-margin-default': 423,
'media-bottom-margin-default': 423,
'media-left-margin-default': 423,
'media-right-margin-default': 423,
'media-top-margin-supported': 423,
'media-bottom-margin-supported': 423,
'media-left-margin-supported': 423,
'media-right-margin-supported': 423,
'media-col-supported':
[ 'media-size',
'media-top-margin',
'media-bottom-margin',
'media-left-margin',
'media-right-margin',
'media-source',
'media-type' ],
'media-col-default':
{ 'media-size': [Object],
'media-top-margin': 423,
'media-bottom-margin': 423,
'media-left-margin': 423,
'media-right-margin': 423,
'media-source': 'tray-2',
'media-type': 'stationery' },
'media-col-ready': [ [Object], [Object], [Object] ],
'media-source-default': 'tray-2',
'media-size-supported':
[ [Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object],
[Object] ],
'media-source-supported': [ 'auto', 'alternate', 'tray-1', 'tray-2', 'envelope', 'manual' ],
'media-type-default': 'stationery',
'media-type-supported':
[ 'stationery',
'cardstock',
'transparency',
'custom-media-type-recycled',
'labels',
'custom-media-type-vinyllabel',
'custom-media-type-bond',
'envelope',
'custom-media-type-roughenv',
'stationery-letterhead',
'stationery-preprinted',
'custom-media-type-coloredpaper',
'stationery-lightweight',
'stationery-heavyweight',
'custom-media-type-rough',
'custom-media-type-customtype1',
'custom-media-type-customtype2',
'custom-media-type-customtype3',
'custom-media-type-customtype4',
'custom-media-type-customtype5',
'custom-media-type-customtype6' ],
'multiple-document-handling-default': 'separate-documents-collated-copies',
'multiple-document-handling-supported':
[ 'separate-documents-uncollated-copies',
'separate-documents-collated-copies' ],
'multiple-document-jobs-supported': false,
'multiple-operation-time-out': 120,
'number-up-default': 1,
'number-up-supported': [ 1, 2, 3, 4, 6, 9, 12, 16 ],
'orientation-requested-default': 'portrait',
'orientation-requested-supported': [ 'portrait', 'landscape' ],
'output-bin-default': 'face-down',
'output-bin-supported': 'face-down',
'output-mode-default': 'monochrome',
'print-color-mode-default': 'monochrome',
'output-mode-supported': [ 'auto', 'monochrome' ],
'print-color-mode-supported': [ 'auto', 'monochrome' ],
'operations-supported':
[ 'Print-Job',
'Print-URI',
'Validate-Job',
'Create-Job',
'Send-Document',
'Cancel-Job',
'Get-Job-Attributes',
'Get-Jobs',
'Get-Printer-Attributes',
'Pause-Printer',
'Resume-Printer',
'Purge-Jobs' ],
'pdf-k-octets-supported': [ 0, 85000 ],
'page-ranges-supported': true,
'pdl-override-supported': 'attempted',
'pdf-versions-supported': 'iso-32000-1_2008',
'printer-name': 'TOSHIBA e-STUDIO525P',
'printer-make-and-model': 'TOSHIBA e-STUDIO525P',
'pages-per-minute': 55,
'printer-device-id': 'MANUFACTURER:TOSHIBA;COMMAND SET:PCL 6 Emulation, PostScript Level 3 Emulation, PDF, NPAP, PJL;MODEL:TOSHIBA e-STUDIO525P;CLS:PRINTER;DES:TOSHIBA e-STUDIO525P;CID:TOSHIBAMonoA;COMMENT:ECP1.0, LV_043D, LP_0229, LF_0084;',
'printer-dns-sd-name': 'TOSHIBA e-STUDIO525P',
'printer-geo-location': undefined,
'printer-icons':
[ 'http://192.168.1.88:80/cgi-bin/dynamic/printer/images/printer.48x48.png',
'http://192.168.1.88:80/cgi-bin/dynamic/printer/images/printer.128x128.png',
'http://192.168.1.88:80/cgi-bin/dynamic/printer/images/printer.512x512.png' ],
'printer-is-accepting-jobs': true,
'printer-info': 'Monochrome - Up to 55 Pages/Minute',
'printer-location': '',
'printer-more-info': 'http://192.168.1.88/',
'printer-state': 'idle',
'printer-state-reasons': 'none',
'printer-up-time': 2079253,
'printer-supplies-info-uri': 'http://192.168.1.88:80/',
'printer-supply-info-uri': 'http://192.168.1.88:80/',
'printer-uri-supported':
[ 'ipp://192.168.1.88:631/ipp/print',
'ipps://192.168.1.88:443/ipp/print' ],
'printer-uuid': 'urn:uuid:e25dbead-c0c2-43b4-83f5-13ec1b194a31',
'print-quality-default': 'normal',
'print-quality-supported': 'normal',
'printer-resolution-default': [ 600, 600, 'dpi' ],
'printer-resolution-supported': [ [Object], [Object], [Object] ],
'reference-uri-schemes-supported': [ 'http', 'https', 'ftp' ],
'queued-job-count': 0,
'sides-default': 'one-sided',
'sides-supported': [ 'one-sided', 'two-sided-long-edge', 'two-sided-short-edge' ],
'uri-security-supported': [ 'none', 'tls' ],
'uri-authentication-supported': [ 'none', 'none' ] } }