OfficeTalk lets you define one or more category sets. A category set is a named list of categories which may be associated with one or more data types. For example, OfficeTalk comes supplied with a category set called 'Diary Categories' which is assigned to task, appointment and resource booking data types. Categories may then be added to the 'Diary Categories' set and these categories will only be available from the Task property sheet and the Appointment property sheet.
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