In 2911, it states the statement below on. For the PJT, I don't see
charset used or defined before ElementsNaturalLanguage. Is this
conformance not needed in the PJT?
3.1.4 Character Set and Natural Language Operation Attributes
Some Job and Printer attributes have values that are text strings and
names intended for human understanding rather than machine
understanding (see the 'text' and 'name' attribute syntax
descriptions in section 4.1). The following sections describe two
special Operation Attributes called "attributes-charset" and
"attributes-natural-language". These attributes are always part of
the Operation Attributes group. For most attribute groups, the order
of the attributes within the group is not important. However, for
these two attributes within the Operation Attributes group, the order
is critical. The "attributes-charset" attribute MUST be the first
Hastings, et al. Standards Track [Page 24]
RFC 2911 IPP/1.1: Model and Semantics September 2000
attribute in the group and the "attributes-natural-language"
attribute MUST be the second attribute in the group. In other words,
these attributes MUST be supplied in every IPP request and response,
they MUST come first in the group, and MUST come in the specified
order. For job creation operations, the IPP Printer implementation
saves these two attributes with the new Job object as Job Description
attributes. For the sake of brevity in this document, these
operation attribute descriptions are not repeated with every
operation request and response, but have a reference back to this
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