This binary part is said to be used for the storage of "arbitrary user-defined data". No further detail is given as to what user action would trigger the use of this "user-defined" data. Without further definition, no interoperability of this feature is possible.
Fully define the use of Custom Property Part
- Part 1, Section 12.3.5
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Proposed Disposition of DIS 29500 Comment US-0034 (Modified: 2008-01-11) Agreed; the following changes will be made to Part 1, §12.3.5, page 68, lines 2432: 12.3.5 Custom Property Part Content Type: Any content, support for which is application-defined. [Note: Some examples of formats which might be supported include: application/vnd.openxmlformats-officedocument.spreadsheetml.customProperty application/xml end note] Root Namespace: Not applicable Source Relationship: http://schemas.openxmlformats.org/officeDocument/2006/relationships/customProperty This binary part supports the storage of arbitrary custom user-defined data. [Note: It is recommended that a Custom Property Part contain XML content for improved interoperability; however, there is no requirement on the format of the content contained in a Custom Property Part. end note] A n instance of this part type A package shall contain correspond to at most one Custom Property part, and that part shall be the target of an implicit relationship from the Workbook Worksheet (§12.3.24) (§12.3.23) part. A package can contain more than one Custom Property Part. [Example: The following Workbook Worksheet part-relationship item contains a relationship to the Custom Property part, which is stored in the ZIP item CustomProperty. bin xml : <Relationships xmlns="..."> <Relationship Id="rId7" Type="http://.../customProperty" Target="CustomProperty. bin xml "/> </Relationships> where the contents of CustomProperty.xml could contain the following XML <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <CustomApplicationData xmlns="..."> <CustomProperty name="PropertyName" value="PropertyValue" /> </CustomApplicationData> end example] Similar Comments: CA-0009 , CL-0042 , CL-0047 , CL-0052 , DE-0007 , DK-0102 , FR-0015 , GB-0042 , JP-0037 , PT-0010 ,
