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That extension makes it possible to define procedures to be carried out after the main file has been selected in the new publication creator. Those procedures may include file processing on a drive, displaying dialog boxes, etc. A procedure defined by such an extension can result in a change of the selected main file and of the remaining files added to a releasean edition. If there is more than one plugin for that extension in the application, the plugins are called one by one, until one of them processes the files correctly (does not throw an exception).
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That extension makes it possible to automatically generate thumbnails for added publications, on the basis of files selected for releasesthe editions. Several thumbnails can be generated for one publication, and the editor can choose one of them.
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