The Microsoft Excel File Format - OpenOffice.org

5.41 EXTERNSHEET
5.41.2 Record Contents (BIFF8)
In BIFF8 the record stores a list with indexes to EXTERNALBOOK records (list of REF structures, ➜5.38). See
➜4.10.3 for details about external references in BIFF8.
Record EXTERNSHEET, BIFF8:
Offset Size Contents
0 2 Number of following REF structures (nm)
2 6∙nm List of nm REF structures. Each REF contains the following data:
Offset Size Contents
0 2 Index to EXTERNALBOOK record
2 2 Index to first sheet in EXTERNALBOOK sheet list
4 2 Index to last sheet in EXTERNALBOOK sheet list
5.42 EXTSST – Extended SST
BIFF2 BIFF3 BIFF4 BIFF5 BIFF8
— — — — 00FF H
This record occurs in conjunction with the SST record (➜5.100). It is used by Excel to create a hash table with stream
offsets to the SST record to optimise string search operations. Excel may not shorten this record if strings are deleted
from the shared string table, so the last part might contain invalid data. The stream indexes in this record divide the SST
into portions containing a constant number of strings. See ➜4.11 for more information about shared string tables. It is
not required to write this record when exporting an Excel document.
Record EXTSST, BIFF8:
Offset Size Contents
0 2 Number of strings in a portion, this number is 8
2 var. List of OFFSET structures for all portions. Each OFFSET contains the following data:
Offset Size Contents
0 4 Absolute stream position of first string of the portion
4 2 Position of first string of the portion inside of current record,
including record header. This counter restarts at zero, if the SST
record is continued with a CONTINUE record.
6 2 Not used
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