15.2.16 Thumbnail Part

Content Type:

Any supported image type.

[Note: Some example content types are: image/gif http://www.w3.org/Graphics/GIF/spec-gif89a.txt

image/png

ISO/IEC 15948:2003

http://www.libpng.org/pub/png/spec/

image/tiff

http://partners.adobe.com/public/developer/tiff/index.html#spec

image/pict

http://developer.apple.com/documentation/mac/QuickDraw/QuickDraw- 2.html

http://www.w3.org/Graphics/JPEG/

image/jpeg end note]

Root Namespace:

Not applicable

Source Relationship:

http://purl.oclc.org/ooxml/officeDocument/relationships/metadata/thumbnail

To help end-users identify parts of a package or the package as a whole, images, called thumbnails, can be stored in that package. Each thumbnail image is generated by the package producer and is stored in the package as a ZIP item. There are no limitations on the size or dimensions of the thumbnail produced, and applications are free to scale the images as desired.

Thumbnail ZIP items shall be identified by either a package-relationship item or a part-relationship item. Packages shall not contain more than one thumbnail relationship associated with the package as a whole, or more than one thumbnail relationship per package part.

[Example: The following PresentationML’s package-relationship item contains one relationship, for the metafile image stored in the ZIP item thumbnail.wmf:

<Relationships xmlns="…">
  <Relationship Id="rId2"
    Type="http://…/thumbnail" Target="docProps/thumbnail.wmf"/>
</Relationships>

end example]

A Thumbnail part shall be located within the package containing the relationships part (expressed syntactically, the TargetMode attribute of the Relationship element shall be Internal).

A Thumbnail part shall not have implicit or explicit relationships to other parts defined by ISO/IEC 29500.