12.4 External Workbooks

Source Relationship:

http://purl.oclc.org/ooxml/officeDocument/relationships/externalLinkPath

An external workbook is a SpreadsheetML package whose contents are being referenced by the current SpreadsheetML package. When a package refers to external workbooks, it shall store the location of those workbooks using this relationship.

A package is permitted to contain one or more External Workbook relationships, and those relationships shall be an explicit relationship from the External Workbook References (12.3.9) part.

[Example: An External Workbook References part, which references the package c:\sourceData.xlsx would have an External Workbook relationship, which points at that file:

<Relationships xmlns="…">
  <Relationship Id="rId1"
    Type="http://…/externalLinkPath"
    Target="c:\sourceData.xlsx" TargetMode="External"/>
</Relationships>

end example]

A external workbook shall be located external to the package containing the relationships part (expressed syntactically, the TargetMode attribute of the Relationship element shall be External).