0x13            no-value

      Tag Value (Hex) Meaning

      0x14-0x1F       reserved for future "out-of-band" values.

   The "unsupported" value MUST be used in the attribute-sequence of an
   error response for those attributes which the printer does not
   support.  The "default" value is reserved for future use of setting
   value back to their default value. The "unknown" value is used for
   the value of a supported attribute when its value is temporarily
   unknown.  The "no-value" value is used for a supported attribute to
   which





 
RFC 2565            IPP/1.0: Encoding and Transport           April 1999


   no value has been assigned, e.g. "job-k-octets-supported" has no
   value if an implementation supports this attribute, but an
   administrator has not configured the printer to have a limit.

   The following table specifies the integer values for the value-tag:

      Tag Value (Hex)  Meaning

      0x20             reserved
      0x21             integer
      0x22             boolean
      0x23             enum
      0x24-0x2F        reserved for future integer types

   NOTE: 0x20 is reserved for "generic integer" if it should ever be
   needed.

   The following table specifies the octetString values for the value-
   tag:

      Tag Value (Hex)  Meaning

      0x30             octetString with an  unspecified format
      0x31             dateTime
      0x32             resolution
      0x33             rangeOfInteger
      0x34             reserved for collection (in the future)
      0x35             textWithLanguage
      0x36             nameWithLanguage
      0x37-0x3F        reserved for future octetString types

   The following table specifies the character-string values for the
   value-tag:

      Tag Value (Hex)  Meaning

      0x40             reserved
      0x41             textWithoutLanguage
      0x42             nameWithoutLanguage
      0x43             reserved
      0x44             keyword
      0x45             uri
      0x46             uriScheme
      0x47             charset
      0x48             naturalLanguage







 
RFC 2565            IPP/1.0: Encoding and Transport           April 1999


      Tag Value (Hex)  Meaning

      0x49             mimeMediaType
      0x4A-0x5F        reserved for future character string types

   NOTE: 0x40 is reserved for "generic character-string" if it should
   ever be needed.

   NOTE:  an attribute value always has a type, which is explicitly
   specified by its tag; one such tag value is "nameWithoutLanguage".
   An attribute's name has an implicit type, which is keyword.

   The values 0x60-0xFF are reserved for future types. There are no
   values allocated for private extensions. A new type MUST be
   registered via the type 2 registration process [RFC2566].

   The tag 0x7F is reserved for extending types beyond the 255 values
   available with a single byte. A tag value of 0x7F MUST signify that
   the first 4 bytes of the value field are interpreted as the tag
   value.  Note, this future extension doesn't affect parsers that  are
   unaware of this special tag. The tag is like any other unknown tag,
   and the value length specifies the length of a value which contains a