Lessons of a Virtual Timetable "The market for e-learning has been slow to take off. What does that say about its future?" http://www.economist.com/displayStory.cfm?Story_ID=505047
What is XML? http://www.xml.com/pub/a/98/10/guide1.html#AEN58
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Without Metadata, Content Is Just Bits "In the Internet Age, there may be no data more valuable than data about data." http://library.northernlight.com/MG20001122020000014.html?cb=13&sc=0