The Microsoft Excel File Format - OpenOffice.org

4.10 Internal and External References
• External and 3D References
External and 3D references are represented in a formula by the tokens tRef3d (➜3.9.15) or tArea3d (➜3.9.16). These
tokens contain an index to an EXTERNSHEET record located in the own Local Link Table and indexes to the first and
last referenced sheet.
For 3D references, the tokens contain a negative EXTERNSHEET index, indicating a reference into the own workbook.
The absolute value is the one-based index of the EXTERNSHEET record that contains the name of the first sheet. The
tokens additionally contain absolute indexes of the first and last referenced sheet. These indexes are independent of the
EXTERNSHEET record list. If the referenced sheets do not exist anymore, these indexes contain the value –1 (3D
reference to a deleted sheet), and an EXTERNSHEET record with the special name “” (own document) is used.
Each external reference contains the positive one-based index to an EXTERNSHEET record containing the URL of the
external document and the name of the sheet used. The sheet index fields of the tokens are not used.
Example: A document with 7 sheets (named from “Sheet1” to “Sheet7”) contains on “Sheet1” the formulas
=Sheet2!A1,
=Sheet1!A1,
=SUM(Sheet4:Sheet6!A1:B3),
=SUM([example.xls]ExtSheet1!A1:B2) (contents: A1=1.11, B1=2.22, A2=3.33, B2=4.44),
=[example.xls]ExtSheet3!A1 (contents: “ABCD”), and
=Sheet8!A1.
The Local Link Table of Sheet1 contains 7 EXTERNSHEET Sheet Blocks:
EXTERNCOUNT Number of EXTERNSHEET records = 7
EXTERNSHEET 1 Name = “Sheet2”
EXTERNSHEET 2 Name = “” (own sheet, ➜2.5.9)
EXTERNSHEET 3 Name = “Sheet4”
EXTERNSHEET 4 Name = “Sheet6”
EXTERNSHEET 5 Name = “[example.xls]ExtSheet1”
XCT Number of CRN = 2
CRN 0 Cell range = A1:B1, contents = 1.11, 2.22
CRN 1 Cell range = A2:B2, contents = 3.33, 4.44
EXTERNSHEET 6 Name = “[example.xls]ExtSheet3”
XCT Number of CRN = 1
CRN 0
Cell range = A1, contents = “ABCD”
EXTERNSHEET 7 Name = “” (own workbook, ➜2.5.9)
Inside of the first formula the cell reference is represented by the token tRef3d (➜3.9.15). The third formula
contains the token tArea3d (➜3.9.16). The last formula contains a tRef3d token which refers to the last
EXTERNSHEET record and contains –1 as sheet indexes.
101