Abstract: Media objects such as film clips that have been stored for subsequent retrieval are represented in a display. In order to apply metadata tags to the objects, a user selects an individual media object from the display, and allocates a designated tag or set of such tags to the selected media object by placing a representation of the selected media object in a region of the display representing the designated tag or set of tags, whereby data relating to the selected media object is stored associating it with the tags so identified.

Abstract: A method and apparatus 400 are provided for carrying out conversion of structured information data sets structured according to a first predefined structure 405 into data sets structured according to a second predefined structure 410 by way of an intermediate data structure 300. Conversion rules 420 are defined to convert from each of the first 405 and second 410 predefined structures into the intermediate data structure 300 and from the intermediate data structure 300 into each of the first 405 and second 410 predefined structures. A pre-processor 435 is provided to carry out initial processing tasks 425 on a received data set 405 to make it more susceptible to structural processing 440 according to the conversion rules 420, and a post-processor 445 is provided to carry out tasks 430 such as vocabulary and data type conversion.