|From:||William Frank <williamf.frank@xxxxxxxxx>|
|Date:||Sun, 11 Aug 2013 21:29:50 -0400|
On Sun, Aug 11, 2013 at 2:21 PM, Simon Spero <sesuncedu@xxxxxxxxx> wrote:
Well, your point is well taken, but really, is this not just a matter of not using a single, consistent discriminator for a EACH taxonomy. In other words, a taxonomy of what? Genentics, where we have mammals and ungulates, and Human Effects, where we have beneficial, harmful, etc. Two orthogonal taxonomies, or classification schems, for different families of concepts.
Combinations of classifiers that are part of orthogonal classification schemes need to be accommodated in a different manner (most effectively, in my experience, through composition, but most commonly through "multiple inheritance" (but me, I do not know what "inheritance" means, except in biology and in class-oriented programming languages -- ((though I used to know, before I thought about it much)).
Then, whether one uses numbers, be they decimal or hexadecimal, to identify the different classifiers in each the sets of classifiers at each level in a hierarchy, or letters, etc., is kind of immaterial, isn't it?
Except, you never know, at any given point in time, whether you will need to EXPAND a given level. This gave the dewey decimal system problems. Moreover, the proximity of numbers implies a proximity of ideas that may be inappropriate. The conceptual distance between two concepts at the same level should itself be assignable. There will not always be a set number of distances. And, when a new concept appears at the same level, you may want to put it in between two already at that level.
It is more extensible and elegant to simply define a partial order with the constraints that turn it into a hierarchy. This way, the numbers are not adding any constraints, and are not implying any unintended significance.
_________________________________________________________________ Message Archives: http://ontolog.cim3.net/forum/ontolog-forum/ Config Subscr: http://ontolog.cim3.net/mailman/listinfo/ontolog-forum/ Unsubscribe: mailto:ontolog-forum-leave@xxxxxxxxxxxxxxxx Shared Files: http://ontolog.cim3.net/file/ Community Wiki: http://ontolog.cim3.net/wiki/ To join: http://ontolog.cim3.net/cgi-bin/wiki.pl?WikiHomePage#nid1J (01)
|<Prev in Thread]||Current Thread||[Next in Thread>|
|Previous by Date:||Re: [ontolog-forum] Taxonomies, cuts, and the decimal system, John F Sowa|
|Next by Date:||[ontolog-forum] Are Classifications nothing more than Indexes?, Frank Guerino|
|Previous by Thread:||Re: [ontolog-forum] Taxonomies, cuts, and the decimal system, John F Sowa|
|Next by Thread:||[ontolog-forum] Are Classifications nothing more than Indexes?, Frank Guerino|
|Indexes:||[Date] [Thread] [Top] [All Lists]|