This file is optionnal.
It allows to describe your skin in the conf/skin.xml file.
<skin> <label i18n="true|false">...</label> <description i18n="true|false">...</description> <thumbnails> <small>path_to_16px_image_relative_to_resources_dir</small> <medium>path_to_32px_image_relative_to_resources_dir</medium> <large>path_to_48px_image_relative_to_resources_dir</large> </thumbnails> </skin>
Every tag is optionnal.
For label and description, if i18n is false, value is the label. If i18n is true, value is the i18n key in the skin catalogue (or in another catalogue using the following syntax CATALOGUE:KEY)
For thumbnails put you file in the directory resources of your skin and insert the path. E.g. "img/thumb_16.png"