1 EXTRACT
   Format: EXTRACT/ATTACHMENT=attachment-number [filename]

   NOTE: The /ATTACHMENT qualifier is required with EXTRACT. 
   This qualifier specifies the number of the attachment as 
   displayed by the LIST command. In a single part message, 
   no attachment number is displayed. For this case specify
   attachment number one. 

   EXTRACT extracts the specified attachment to a file in its 
   native file format or in another format specified by the /FDL 
   qualifier.  By default, the attachment is written to a file in 
   the default directory, using the name specified by the 
   Content-Disposition header of the attachment. If no file name 
   is provided, the program prompts for one. A file name can be 
   specified in the command to override the value of the 
   Content-Disposition header.

2 /FDL
   /FDL=filename

   Specifies a File Descriptor Language (FDL) definition file to use
   when converting the specified attachment into an output file. Use
   this qualifier when the desired file characteristics differ than
   those produced by the MIME utility default settings, or are different
   than those specified in the MIME$MAILCAP.DAT file

   Note that the /FDL qualifier will override the default FDL file
   specified in MIME$MAILCAP.DAT file (if one exists). 

   FDL files can be created with the ANALYZE/RMS/FDL command and also
   created and edited with the EDIT/FDL command.

3 Example_to_Create_a_FDL
   One way to create a FDL file is from an existing file and type. For
   example