A correction to one of my code samples:
<span class="price"><span class="currencyamount"><abbr
class="unitcurrency" title="USD">$</abbr>25</span> a <abbr class="unit"
title="barrel>barrel</abbr></span>.
Guillaume
Guillaume Lebleu wrote:
Sorry if I'm only getting up-to-speed on this debate.
I agree that attaching explicitly date/time information directly to a
currency value is relatively rare, and when necessary that it is
usually inferred from the context.
For instance, we talk of the date of the price of a barrel of oil, in
which case the date/time is attached to the "price" component of a
"product", the "currency value" being only one expression of the
"price". See Andy's example:
http://news.bbc.co.uk/2/hi/business/1096916.stm
On the other hand, I think attaching date/time information to
*currency rates* is very common (See Andy's example:
http://en.wikipedia.org/wiki/1922_in_Germany#Inflation_and_Repercussions).
Moreover, even though a currency rate is the "price" of a "product",
it is particular enough that it deserves its own class.
Taking one of Andy's examples that deals with currency rates, and
reusing both the abbr/date pattern used in hCalendar and some he
IFX/OFX semantics, I think we could get away with:
<span class="currencyrate">On <abbr class="datetime"
title="1998-03-12T08:30:00-05:00">August 1</abbr>, the <abbr
class="currency" title="USD">US Dollar</abbr> still stood at <span
class="currencyamount">643 <abbr class="unitcurrency"
title="DEM">Marks</abbr></span> to the Dollar.</span>
i.e.:
* currencyrate
o currency
o currencyamount
+ unitcurrency
Another attempt with the oil barrel example:
<span class="price"><span class="currencyamount"><abbr
class="unitcurrency" title="USD">$</abbr>25</span> a <abbr
class="unit" title="barrel>barrel</barrel></span>.
i.e.:
* price
o currencyamount
+ unitcurrency
o unit
Of course, this is just brainstorming, as I am just getting started
with microformats.
Guillaume
Scott Reynen wrote:
In the currency-brainstorming [1] page, I see a few straw man
proposals with dated currency. But I don't see anything in
currency-examples [2] with dated currency. I think I understand the
general idea, that currencies change value over time, but in what
currently published HTML would such date markup be used? I'm sure
there are examples of dated currency published on the web, but I
suspect they are far under 20% of the currency values published. I'm
interested in seeing this microformat completed and adopted and I'd
hate to see unnecessary complexity prevent that from happening.
[1] http://microformats.org/wiki/currency-brainstorming
[2] http://microformats.org/wiki/currency-examples
Peace,
Scott
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