Maybe your answer also provides a clue to my next question:
If attributes-charset and attributes-natural-language Job Description
Attributes are MANDATORY according to MOD/4.3, why aren't they shown as=
MANDATORY in "Group 3: Job Object Attributes" under
Print-Job Response:
Print-URI Response:
Create-Job Response:
Send-Document Response:
Send-URI Response:
Get-Job-Attributes Response:
Get-Jobs Response:
in MOD/15.3.4.3 "Validate the presence of a single occurrence of requir=
ed
Operation attributes"?
Could it be that the word MANDATORY has different meanings in these two=
sections?
4.3: MANDATORY ... attribute[s] MUST be supported by Printer objects.=
If it is not indicated as MANDATORY, then it is OPTIONAL
15.3.4.3: MANDATORY attributes [are those] that an IPP object MUST
support and that a client MUST supply
It's still not clear to me.
-Carl
robert.herriot@Eng.Sun.COM on 04/06/98 01:48:31 PM
Please respond to robert.herriot@Eng.Sun.COM
To: ipp@pwg.org, Carl Kugler/Boulder/IBM@ibmus
cc:
Subject: Re: IPP> PRO Section 9.7 vs. MOD section 4.3: need clarifica
If I understand your question correctly, I think that you have having t=
he same
confusion
that many other people have had about the word "MANDATORY". It means t=
hat
the "Printer" must support the attribute. It does NOT mean that the att=
ribute
must
be included in each request/response.
In this particular case, attributes-charset is MANDATORY, i.e. the prin=
ter
must
support the attribute, but in the get-jobs reponse it MUST be in the op=
eration
attributes
group and it is only in each job attribute group if the client requeste=
d the
attribute via the
requested-attributes attribute in the request. Note, even if it is pres=
ent
in a
job attributes
group it does not affect the charset of those attributes. All attribut=
es in
the entire
response are in the charset specified by attributes-charset in the oper=
ations
attribute
group, which I still believe must be first in that group (a change we n=
eed to
make
to the model document).
Note that in the example attributes-natural-language is in one of the j=
ob
attribute
groups in order to override the natural-language in the operation attri=
butes.
As I
have been implementing IPP, I have come to believe that this was a bad =
idea.
It again
requires a special ordering, i.e. attributes-natural-language must prec=
ede all
other
attributes if processing is to be simple.
Bob Herriot
At 03:34 PM 4/3/98 , Carl Kugler wrote:
>Looking at example 9.7, Get-Jobs Response, I don't see an attributes-c=
harset
>attribute in any of the three job attributes groups.* But section 4.3 =
of the
>Model document, "Job Description Attributes", says that attributes-cha=
rset is
>MANDATORY in the "job-description" attribute group.* This is causing m=
e
>cognitive dissonance.
>
=