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1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   Xilinx Netlist Format
   XNF
      <language, electronics> (XNF) A Hardware Description
    Language for electronic circuit design, developed by Xilinx,
    Inc..
      Xilinx-developed tools use XNF and handle the details of the
      FPGA architecture.  Converters are available for a number of
      widely-used HDLs - for example Verilog (xnf2ver) - so
      that designers can use familiar tools to develop Logic Cell
      Array designs.  In addition, XNF can be converted to the input
      language of different logic simulators.
      Specification
    (ftp://ftp.xilinx.com/pub/documentation/xactstep6/xnfspec.pdf).
      (1999-03-31)