comments on attribute.xsd

[Tim Bergsma]

Hi.

I just read thru eml-attribute.xsd.  

Typos:
canbe
which specify ordered...  (specifies?)
domain violoations
character (in the context of missingValueCode, perhaps character(s))
thatthe

Comments:
It looks like all attributes have accuracy, regardless of scale. 
However, only interval and ratio scales have precision.  That's okay
with me, if there is meaning to the accuracy of categorical values.

However, precision needs work.  We agreed that precision is a
statistical thing, and is pretty useless without a descriptive
interpretation.  Accuracy has a place to describe the test that produced
the value, but precision doesn't have anything equivalent.  This is
bad.  Consider, for example, that better precisions usually have lower
numeric values!  There's got to be a way to describe what the precision
means.  (Often it is the standard deviation of repeated measurements.)

Tim.
-- 
Tim Bergsma
LTER Information Manager
W.K. Kellogg Biological Station
Michigan State University
Hickory Corners, MI   49060
616/671-2337
tbergsma at kbs.msu.edu
http://lter.kbs.msu.edu