Network Print Facility's queue file manager creates a name for each data set it tracks. The Network Print Facility derives the names for the temporary print data sets as follows:

• The name is divided into 4 sections:
  • High-level qualifier
  • Major Key (JES DEST or SLU name)
  • Minor Key (JES job name or VTAM® PLU)
  • Date and time
• NPF obtains the high-level qualifier from an NPFPRINTPREFIX configuration statement, if one is specified. If not, NPF uses the TCP/IP high-level qualifier.
• NPF strips the major key of any trailing blanks.
• NPF strips the minor key of any trailing blanks.
• NPF derives the date and time as follows:
  • Calculates the modulo 25 value for the year, expressed as a letter A=0, B=1,.....,Y=24.
  • Expresses the julian day as a 3-digit number.
  • Expresses the hour in base25 using letters as in the year.
  • Expresses the minute as a 2-digit number.
  • Inserts a period because this makes up 7 characters.
  • Expresses the seconds and tenths of seconds as a 2-digit base 25 number using letters as above. Thus the date and time is YdddHmm.SS where the upper case letters represent the modulo/base 25 letters and the lower case letters represent numbers,
• NPF starts the name with the complete high-level qualifier.
• NPF ends the name with the complete date.
• NPF merges the lengths of the major and minor keys into one string if the sum is <= 8. Otherwise, NPF uses them as two strings separated by a period.
• If necessary, NPF truncates the major/minor keys from the right to fit within the 44-character limit required by MVS™. If the length of the high-level qualifier is 14 or less, no truncation occurs.