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Re: [xml-dev] What are units-of-measure? e.g., what's a "kilometer"?

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• To: "Roger L. Costello" <costello@mitre.org>
• Subject: Re: [xml-dev] What are units-of-measure? e.g., what's a "kilometer"?
• From: James Landrum <james.landrum@ndsu.nodak.edu>
• Date: Thu, 17 Jul 2003 07:31:48 -0500
• Cc: xml-dev@lists.xml.org
• Organization: NDSU Archaeology Technologies Laboratory, Digital Archive Networkfor Anthropology
• References: <3F1680EC.1683F3EC@mitre.org>
• User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0.2) Gecko/20030208 Netscape/7.02

``` All units of measure describe DIMENSIONS. If a thing exists it has
dimensions. Dimensions are attributes of things. Attributes are
variously given labels or names (appelations), and these are variously
also called properties, elements, and so forth.  There are classes and
types of dimensions, categorized according to whatever system applies.
A kilometer is a label for a unit of measure that describes a standard
(linear) distance (a dimension); in this case the standard is the metric
system.  A kilometer itself is not physical stuff, it is a conceptual
thing. The rod (or other device or object) used to measure the kilometer
is physical stuff.

Roger L. Costello wrote:

>Hi Folks,
>
>Consider this statement:
>
>  "The length of the Yangtze River is 6300 kilometers."
>
>What is a "kilometer"?
>
>1. Is kilometer a class?  Is 6300 an instance of the kilometer class?
>     kilometer class: {..., 6300, ...}
>
>2. Is kilometer a function? e.g., kilometer(Yangtze) --> 6300
>   In general: kilometer(physical object) --> number
>   "The kilometer function maps a physical object to a number."
>
>3. Is kilometer a property? e.g., a property of the Yangtze River
>   is kilometer (this doesn't quite sound right; perhaps there's
>   another way of expressing this that is more natural?)
>
>4. Is kilometer a label?  If so, then what's a label?
>
>Or is it something else?  /Roger
>
>
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--
From the Desk of James E. Landrum III
Database Manager
Archaeology Technologies Laboratory (ATL; http://atl.ndsu.edu)
Digital Archive Network for Anthropology (DANA; http://atl.ndsu.edu/archive)
North Dakota State University, Fargo, North Dakota 58105
Ph: 701-231-7115 (my desk) and ATL 701-231-6434
FAX: 701-231-1047
email: james.landrum@ndsu.nodak.edu

```

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