The following terms are used throughout this document
Viewer refers to the Issuu document viewer.
A layout descriptor is an XML document that specifies the user interface for the Viewer using the Issuu Markup Language (IML).
A skin library is a file containing graphics used for skinning the Viewer.
A skin is a graphical item within a skin library.
Skinning refers to the application of skins to interface elements in the Viewer.
A theme is a package consisting of a layout descriptor and optionally one or more skin libraries.
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