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Sunday, August 25, 2002

Lunch with Bob, Wayne, Steve, and David had numerous highpoints.
  • Learning Objects. We'll no sooner deal directly with learning objects than we'll order atoms for breakfast. Yeah, they're in there, but they don't appear on the menu. Assemblies, for example scrambled eggs, are the level we call for.
  • Housing provides a great example of right-sized assemblies or components. Decades ago, modular housing was deemed inevitable because of efficiencies of production, but it never took off as predicted. Assemblies -- entire rooms -- were too large to customize. Today, pre-built components make up 80% of a new house. An assembly might be a door, hinges, doorframe, doorknobs, and lockset. Homebuilders can mix and match to achieve custom results from standard assemblies.
  • Wayne and Steve hypothesize that granularity (assembly size) is directly proportional to ease of understanding but inversely proportional to reusability. Exponentially. Hence, I can use a nail just about anywhere but by-and-of-itself, a nail doesn't tell me much.
  • Object orientation's raison d'être is to avoid reinventing the wheel, or, in this case, the object. The effort should go into design and assembly, not rebuilding objects.
  • "Design is finished when it's fully constrained." Does this mean that designs are never finished? Wayne allayed my fears that the goal was to turn everything over to machines and their algorithms. The overall goal is to augment human capability, not to replace it.
  • Great parallel from the world of music. Give a score to an orchestra and also feed it into a synthesizer. The human ear prefers the orchestral version. Have the computer isolate the differences in the performances and generate algorithms to describe them. Feed the algorithms back into the synthesizer and get back a more satisfying sound.
  • Wayne: "In five years, all content will be dynamic." Who needs the standard version when the personalized one costs no more?
  • Wayne: We've got the objects and the metadata standards. Now we are working on the mapping. (RDF to define relationships among objects.)
  • Slippery ground: When is it meta-data and when is it data? I'm sure Heisenberg would have something to say about this....
  • Wayne: "I don't understand the utility of the New York Times Bestseller List. I want to know what my friends are reading."
  • Wayne: Learning objects are like teenage sex. Everyone says they're doing it. Very few are. And those who are doing it, do it poorly. Maybe 10 of the Fortune 100 are doing it. Poorly.

  • A standard should follow practice and not vice-versa.


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