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On Thu, May 30, 2019 at 7:21 AM Costello, Roger L. <costello@mitre.org> wrote:

                Alan Turing

What would be a more elementary form of that data?

Perhaps <givenName>Alan</givenName><surname>Turing</surname>.

Another example: here is data about a location; specifically, the latitude and longitude of Boston Logan airport:

                42.3656° N, 71.0096° W

<latitude value="42.3656" precision="4" direction="N"/>
<longitude value="71.0096" precision="4" direction="W">

Alternatively the directions could be coded as signs on the value with the usual convention of N and E being positive and S and W being negative.

Is abstraction a property?

Clearly not.  Different forms may be more or less abstract:   For example, the GNUCobol compiler translates Cobol to C which is compiled to assembly language which is compiled to machine language.  Cobol is more abstract than C, which is more abstract than assembly language, which is more abstract than machine language.  So abstractness is a scalar property, not a binary one.

John Cowan   cowan@ccil.org   http://vrici.lojban.org/~cowan
This is a dummy backup signature, in use because vrici is inaccessible.
I have a problem.  I say, "I'll use a computer!"  Now I have 1E6 problems.
"Computers Don't Argue" (1965 story by Gordon Dickson)

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