Custom Property Part

Content Type:

application/vnd.openxmlformats-officedocument.spreadsheetml.customProperty

Root Namespace:

Not applicable

Source Relationship:

http://schemas.openxmlformats.org/officeDocument/2006/relationships/customProperty

This binary part supports the storage of arbitrary user-defined data.

A package shall contain at most one Custom Property part, and that part shall be the target of an implicit relationship from the Workbook (§12.3.23) part.

example:

<Relationships xmlns="…">
  <Relationship Id="rId7" 
    Type="http://…/customProperty" Target="CustomProperty.bin"/>
</Relationships>

A Custom Property part shall be located within the package containing the source relationship (expressed syntactically, the @TargetMode attribute of the <Relationship> element shall be Internal).

A Custom Property part shall not have implicit or explicit relationships to any part defined by this Standard.