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                                             113
SECTION 3.4                                                                     File Structure



         /ID …
     >>
  startxref
     2664                              % Offset of the main xref section
  %%EOF

  2 0 obj                        % The object stream, at offset 3722
      << /Length ...
          /N 8                   % This stream contains 8 objects.
          /First 47              % The stream-offset of the first object
      >>
  stream
      3 0 4 50 5 72 …            % The numbers and stream-offsets of the 8 objects
      << /Type /StructTreeRoot         % This is object 3.
          /K 4 0 R
          /RoleMap 5 0 R
          /ClassMap 6 0 R
          /ParentTree 7 0 R
          /ParentTreeNextKey 8
      >>
      << /S /Workbook            % This is object 4 (K value from StructTreeRoot).
          /P 8 0 R
          /K 9 0 R
      >>
      << /Workbook /Div          % This is object 5 (RoleMap).
          /Worksheet /Sect
          /TextBox /Figure
          /Shape /Figure
      >>
      …                          % Objects 6 through 10 are defined here.
  endstream
  endobj


  11 0 obj                     % The cross-reference stream, at offset 4899
      << /Type /XRef
         /Index [2 10]         % This stream contains entries for objects 2 through 11
         /Size 100
         /W [1 2 1]            % The byte-widths of each field
         /Filter /ASCIIHexDecode     % For readability only (not supported by Acrobat 6)
         …
      >>
  stream
      01 0E8A 0                % Entry for object 2 (0x0E8A = 3722)

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