Technical data

The DECprint Supervisor software attempts to determine the file data type
for each file sent to the PATHWORKS queue. If a file data type cannot be
determined, the file is processed as a PCL file. If the file contains PCL text
followed by PostScript, it is printed properly.
4.2.3 How Users Control Data Type Detection
Users control the way print jobs are processed for automatic data type
detection by specifying:
• The data type with the /PARAMETERS=DATA_TYPE qualifier in the
PRINT command.
This qualifier overrides the automatic data type detection process; only
the presence of DDIF file tags can prevent the file from being processed
using the translator associated with the specified data type. If the file
contains DDIF tags and is explicitly specified as another data type, the file
is not printed. The following error message is displayed, and the DECprint
Supervisor software continues with the next file in the print job (if any):
INVDDIFDATA, Invalid DDIF data, flushing to end of file
• Automatic data type detection with the following PRINT parameter:
/PARAMETERS=DATA_TYPE=AUTOMATIC[=text-data-type]
Users can specify the /PARAMETERS=DATA_TYPE=AUTOMATIC
qualifier to specify automatic data type detection (for example, if the
print queue has a default data type).
If the user includes the default text data type (text-data-type) in the
DATA_TYPE=AUTOMATIC parameter, the DECprint Supervisor software
assumes the specified data type if the data type of a print file cannot be
determined.
The text-data-type value is optional; the default is ANSI. Users should
include this value to specify another text data type, such as PCL or
Proprinter.
The DECprint Supervisor software can print a file that starts with the
default text data type followed by PostScript data. If a user needs to print
a file that begins with PCL text followed by PostScript data, the user can
explicitly set the default text data type to be PCL using the following
PRINT command:
$ PRINT/QUEUE=PS20$A10 PIC.MSG/PARAMETERS=(DATA_TYPE=AUTOMATIC=PCL)
4–4 Providing Automatic Data Type Detection