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Re: On Quantity - Measurement relationship
- From: Werner Keil <
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- To: "
" <
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- Subject: Re: On Quantity - Measurement relationship
- Date: Sat, 1 Nov 2014 16:37:40 +0100
That's part of the Spec, while some terms there (OK, "Measurable" was
already purged[?]) may be influenced by JSR 275 or the prior Unit-API
Quantity currently refers to Wikipedia:
http://en.wikipedia.org/wiki/Quantity
Quantities can be compared in terms of "more", "less" or "equal", or, by
assigning a numerical value in terms of a unit of measurement
They are both called Quantity here, and thus having a base type Quantity
allowing those non-numerical terms like "more", "less", "heavy", "light",
"blue", "red" or "green", "Medium", "X-Large", etc. (often best represented
by enums) and then something like Measurement (assigning a numerical value
in terms of a unit of measurement)
we'd perfecly cover both magnitude and multitude (or a more general
non-numeric form)
Werner
On Sat, Nov 1, 2014 at 4:17 PM, Martin Desruisseaux <
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wrote:
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Le 01/11/14 22:53, Jean-Marie Dautelle a écrit :
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> Note: We see in that case that Quantity cannot implement Comparable.
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> HEAVY/LIGHT may depend on the context, the boundary may not be well
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> defined or be relative, e.g. we can compare HEAVY with LIGHT but not
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> HEAVY with another mass).
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Right. But HEAVY and LIGHT are not "quantitative measurement". This
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bring us back to my original question: what is our definition of Quantity?
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Guys, I feel that before to continue any further in this discussion, we
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need to write a "Definition of terms" page.
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>
Martin
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