WIMS> CIM> Another anomaly in CIM_Printer. Let's not fix this one.

WIMS> CIM> Another anomaly in CIM_Printer. Let's not fix this one.

WIMS> CIM> Another anomaly in CIM_Printer. Let's not fix this one.

Ira McDonald blueroofmusic at gmail.com
Mon Mar 9 13:53:14 EDT 2009


Hi Rick,

Yes, the DESCRIPTION clause should document this oddity.

For the record we (Rick and Ira) didn't do this.

This property had a pre-existing WRONG enum list - I just
added some to the end from Printer MIB v2 3 years ago.

The (machine-translated) enum list in new CIM_PrintInterpreter
LangType property is CORRECT - it does NOT match this
old stinker.

Since CIM_Printer.DefaultLanguage will be DEPRECATED,
CIM_Printer.LanguagesSupported should be DEPRECATED
- use instead PrintInterpreter.LangType values for both - so
we can make them MUST NOT implement in our future CIM
Network Printer Profile - right?

Cheers,
- Ira

Ira McDonald (Musician / Software Architect)
Chair - Linux Foundation Open Printing WG
Blue Roof Music/High North Inc
email: blueroofmusic at gmail.com
winter:
  579 Park Place  Saline, MI  48176
  734-944-0094
summer:
  PO Box 221  Grand Marais, MI 49839
  906-494-2434



On Mon, Mar 9, 2009 at 1:02 PM,  <Richard_Landau at dell.com> wrote:
> Another, um, anomaly in CIM_Printer.  Not a bug.  Sort of.  Maybe we did
> this deliberately, since it appears to make sense, but we ought at least to
> say something to warn poor, naive coders.
>
> The enum list of property CIM_Printer.LanguagesSupported does not quite
> match that of prtInterpreterLangFamily, which makes a direct mapping
> impossible.  Note that after value 6(PostScript), the numbers do not match.
> Actually, the numbers 7 thru 41 are all shifted up by one because we moved
> number 42 to number 7 in the enum list and shifted all the others up to make
> room.  Since 42 was then missing, the numbers after 43 align again.  Tricky,
> tricky.
>
> I will paint over this nicely in the prototype.  I don't think we ought to
> fix it.  But we ought to document it.  Who would read a 3-page-long enum
> list if he didn't have to?
>
> CIM_Printer.mof says (highly abridged excerpts of all docs)
>
>        ValueMap { "1", "2", "3", "4", "5", "6", "7", "8", "9", "10",
>
>           "11", "12", "13", "14", "15", "16", "17", "18", "19",
>
>         . . .
>
>        Values { "Other", "Unknown", "PCL", "HPGL", "PJL", "PS",
>
>           "PSPrinter", "IPDS", "PPDS",
>
>          // 10
>
>           "EscapeP",
>
>           "Epson", "DDIF", "Interpress", "ISO6429", "Line Data",
>
>         . . .
>
> But RFC3805 says
>
> PrtInterpreterLangFamilyTC ::= TEXTUAL-CONVENTION
>
>     SYNTAX    INTEGER {
>
>         other(1),
>
>         unknown(2),          -- Not in RFC 1759
>
>         langPCL(3),          -- PCL.  Starting with PCL version 5,
>
>         langHPGL(4),         -- Hewlett-Packard Graphics Language.
>
>         langPJL(5),          -- Peripheral Job Language.  Appears in
>
>         langPS(6),           -- PostScript (tm) Language
>
>         langIPDS(7),         -- Intelligent Printer Data Stream
>
>         langPPDS(8),         -- IBM Personal Printer Data Stream.
>
>         langEscapeP(9),      -- Epson Corp.
>
>         langEpson(10),
>
>         langDDIF(11),        -- Digital Document Interchange Format
>
>         langInterpress(12),
>
>         langISO6429(13),     -- ISO 6429.  Control functions for
>
>         langLineData(14),    -- line-data:  Lines of data as
>
>         langMODCA(15),       -- Mixed Object Document Content
>
> And RFC1759 says -- now watch closely, the fingers will never leave the
> hands --
>
> prtInterpreterLangFamily OBJECT-TYPE
>
>     -- This value is a type 2 enumeration
>
>     SYNTAX     INTEGER {
>
>           other(1),
>
>           langPCL(3),        -- PCL.  Starting with PCL version 5,
>
>           langHPGL(4),       -- Hewlett-Packard Graphics Language.
>
>           langPJL(5),        -- Peripheral Job Language. Appears in the
>
>           langPS(6),         -- PostScript Language (tm)
>
>           langPSPrinter(42), -- The PostScript Language used for
>
>           langIPDS(7),       -- Intelligent Printer Data Stream
>
>           langPPDS(8),       -- IBM Personal Printer Data Stream.
>
>           langEscapeP(9),
>
>           langEpson(10),
>
>           langDDIF(11),      -- Digital Document Interchange Format
>
>           langInterpress(12),
>
>           langISO6429(13),   -- ISO 6429.  Control functions for Coded
>
>           langLineData(14),  -- line-data:  Lines of data as separate
>
>           langMODCA(15),     -- Mixed Object Document Content Architecture
>
> See that tricky out-of-order sequence there, 5, 6, 42, 7, 8, . . . .   Once
> again proving the wisdom and foresight of The Hitchhiker's Guide to the
> Galaxy that 42 is more important than it appears at first.
>
> I caught this only because one of the languages in the (fake) printer I test
> with most of the time is "Automatic," the value of which changed from 37 to
> 38 as a result of this shift.
>
> rick
>
> ----------------------
> Richard_Landau(at)dell(dot)com, Stds & System Mgt Architecture, CTO Office
> +1-512-728-9023, One Dell Way, RR5-3, MS RR5-32, Round Rock, TX 78682
>




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