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Date: Wed, 16 Sep 1998 10:30:55 -0600
From: Carl Kugler <kugler at us.ibm.com>
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Subject: IPP> ADM - IPP Implementors' Guide Version 01: Discussion
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In reply to:
> Question How should the server handle the situation where the "attributes-charset" of the response itself is "us-ascii", but one or more attributes in that response is in the "utf-8" format?
>> Consider a case where a client sends a Print-Job request with "utf-8" as the value of "attributes-charset" and with the "job-name" attribute supplied. Later another client
> sends a Get-Job-Attribute or Get-Jobs request. This second request contains the "attributes-charset" with value "us-ascii" and "requested-attributes" attribute with
> exactly one value "job-name".
>> According to the IPP-Mod document (section 18.104.22.168), the value of the "attributes-charset" for the response of the second request must be "us-ascii" since that is the charset
> specified in the request. The "job-name" value, however, is in "utf-8" format. Should the request be rejected even though both "utf-8" and "us-ascii" charsets are supported by the server? or should the "job-name" value be converted to "us-ascii" and return "successful-ok-conflicting-attributes" (0x0002) as the status code?
>> Van Dang
My understanding: in this situation the Printer is required to convert
the job-name value from utf-8 charset to us-ascii. If it can't, it
shouldn't advertise us-ascii as a attributes-charset-supported.
One implementation strategy is to convert all incoming text and name
values to a Unicode internal representation. This is 16-bit and
virtually universal. Then convert to the specified operation
attributes-charset on output.