i202 Fall 2009 School of Information, UC Berkeley

26 October 2009

We revisit most of the concerns about metadata from Lecture 6 as they apply to non-text and multimedia objects and resources, but some new challenges arise becasue of the temporal character of audio and video and the semantic opacity of the content.  Because multimedia content can't be (easily) processed to understand what the object means, there is a "semantic gap" between the descriptions that people assign to multimedia content and those that can be assigned by computers or automated processes.  On the other hand, technology for creating multimedia can easily record contextual metadata at the same time.  Thesauri and other aids for professional "metadata makers" are invaluable but rarely used by ordinary people when they tag photos or videos.

Download recorded lecture: [Part 1] from http://courses.ischool.berkeley.edu/i202/f09/files/202-20091026-part1.mp3 [Part 2] from http://courses.ischool.berkeley.edu/i202/f09/files/202-20091026-part2.mp3