<div dir="ltr"><br><div> I agree with Donald here regarding the need for Abundance, but am, to be honest, not quite I understand (or agree) with the logic of the proposal. Abundance is listed as a property of an occurrence, and I wonder if that make sense given the class definition "The category of information pertaining to evidence of an occurrence in nature, in a collection, or in a dataset (specimen, observation, etc.)" Is abundance "evidence of an occurrence in nature". To me, abundance is a property of a survey and its associated methodology and is based on multiple occurrences that come from a sample and a definition of extent. </div>
<div><br></div><div> It seems to me to be a bad fit to scrunch abundance into the occurrence class. I recognize that it might not quite fit anywhere in DwC yet. Wouldn't it be better to wait to see if materialSample is ratified as a class within the Darwin Core?</div>
<div><br></div><div>Best, Rob</div><div><br></div><div><br></div><div> </div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Sep 26, 2013 at 8:01 AM, Donald Hobern [GBIF] <span dir="ltr"><<a href="mailto:dhobern@gbif.org" target="_blank">dhobern@gbif.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Thanks, John.<br>
<br>
You are correct. I think though that abundance is such a commonly needed<br>
property that it would be a mistake not to make it work easily even in<br>
Simple Darwin Core.<br>
<div class="im HOEnZb"><br>
Donald<br>
<br>
----------------------------------------------------------------------<br>
Donald Hobern - GBIF Director - <a href="mailto:dhobern@gbif.org">dhobern@gbif.org</a><br>
Global Biodiversity Information Facility <a href="http://www.gbif.org/" target="_blank">http://www.gbif.org/</a><br>
GBIF Secretariat, Universitetsparken 15, DK-2100 Copenhagen Ĝ, Denmark<br>
Tel: <a href="tel:%2B45%203532%201471" value="+4535321471">+45 3532 1471</a> Mob: <a href="tel:%2B45%202875%201471" value="+4528751471">+45 2875 1471</a> Fax: <a href="tel:%2B45%202875%201480" value="+4528751480">+45 2875 1480</a><br>
----------------------------------------------------------------------<br>
<br>
<br>
-----Original Message-----<br>
</div><div class="HOEnZb"><div class="h5">From: <a href="mailto:gtuco.btuco@gmail.com">gtuco.btuco@gmail.com</a> [mailto:<a href="mailto:gtuco.btuco@gmail.com">gtuco.btuco@gmail.com</a>] On Behalf Of John<br>
Wieczorek<br>
Sent: Thursday, September 26, 2013 3:48 PM<br>
To: Donald Hobern [GBIF]<br>
Cc: <a href="mailto:aaike.dewever@naturalsciences.be">aaike.dewever@naturalsciences.be</a>; TDWG Content Mailing List<br>
Subject: Re: [tdwg-content] Proposed new Darwin Core terms - abundance,<br>
abundanceAsPercent<br>
<br>
Could every concept of abundance be captured in a combination of abundance,<br>
abundanceUnit, abundanceMethod?<br>
<br>
If so, is there justification for creating new terms at all if the concepts<br>
can be captured in MeasurentsOrFacts<br>
(<a href="http://rs.tdwg.org/dwc/terms/index.htm#measureindex" target="_blank">http://rs.tdwg.org/dwc/terms/index.htm#measureindex</a>), which have the<br>
following properties?<br>
<br>
measurementType<br>
measurementValue<br>
measurementAccuracy<br>
measurementUnit<br>
measurementDeterminedDate<br>
measurementDeterminedBy<br>
measurementMethod<br>
measurementRemarks<br>
<br>
The only drawback I can see is that with MeasurementOrFacts you could not<br>
share the abunance information in Simple Darwin Core. To understand why, see<br>
<a href="http://rs.tdwg.org/dwc/terms/simple/index.htm#rules" target="_blank">http://rs.tdwg.org/dwc/terms/simple/index.htm#rules</a>.<br>
<br>
<br>
On Thu, Sep 26, 2013 at 10:50 AM, Donald Hobern [GBIF] <<a href="mailto:dhobern@gbif.org">dhobern@gbif.org</a>><br>
wrote:<br>
> Thanks - I think I too have missed something. If we want to make<br>
> these terms usable, there needs to be a simple way to get numbers out<br>
> of records that can be compared with one another where sampling<br>
> methods allow such comparisons. The suggested plain text examples for<br>
> Abundance don't make this possible. Forcing normalisation into<br>
> percentages seems an unnecessary hurdle and risks encouraging the<br>
> impression that number of ducks on a reservoir is somehow comparable<br>
> with percentage dry mass, proportional expression of CO1 for a<br>
> particular species in an ecogenomics sample, or whatever.<br>
><br>
> I would much rather we ensured we had a standard, preferred field<br>
> which the data publisher can populate directly with whatever number is<br>
> the most appropriate expression of the relative abundance in the<br>
> sample. That gives consumers a clear expectation of how to interpret and<br>
handle it.<br>
><br>
> Donald<br>
><br>
> ----------------------------------------------------------------------<br>
> Donald Hobern - GBIF Director - <a href="mailto:dhobern@gbif.org">dhobern@gbif.org</a> Global Biodiversity<br>
> Information Facility <a href="http://www.gbif.org/" target="_blank">http://www.gbif.org/</a> GBIF Secretariat,<br>
> Universitetsparken 15, DK-2100 Copenhagen Ĝ, Denmark<br>
> Tel: <a href="tel:%2B45%203532%201471" value="+4535321471">+45 3532 1471</a> Mob: <a href="tel:%2B45%202875%201471" value="+4528751471">+45 2875 1471</a> Fax: <a href="tel:%2B45%202875%201480" value="+4528751480">+45 2875 1480</a><br>
> ----------------------------------------------------------------------<br>
><br>
><br>
> -----Original Message-----<br>
> From: <a href="mailto:tdwg-content-bounces@lists.tdwg.org">tdwg-content-bounces@lists.tdwg.org</a><br>
> [mailto:<a href="mailto:tdwg-content-bounces@lists.tdwg.org">tdwg-content-bounces@lists.tdwg.org</a>] On Behalf Of Aaike De<br>
> Wever<br>
> Sent: Thursday, September 26, 2013 8:44 AM<br>
> To: <a href="mailto:tuco@berkeley.edu">tuco@berkeley.edu</a>; TDWG Content Mailing List<br>
> Subject: Re: [tdwg-content] Proposed new Darwin Core terms -<br>
> abundance, abundanceAsPercent<br>
><br>
> Dear all,<br>
><br>
> As somewhat of an outsider I have another question with regards to the<br>
> proposed terms abundance and abundanceAsPercent.<br>
><br>
> Is there a specific reason for not adopting:<br>
> * the abundance field as a field to store only the value and<br>
> * a field abundanceUnit/abundanceType to specify whether the value is<br>
> in % of species, % of biovolume, % of biomass, individuals/l,<br>
> ind./m^2, ind/m^3, ind./sampling effort,...(instead of having a field<br>
specific for %)?<br>
><br>
> Maybe this has been discussed during the hackathon and I missed it in<br>
> the report?<br>
><br>
> Thanks for considering this question.<br>
><br>
> With best regards,<br>
> Aaike<br>
><br>
> John Wieczorek wrote:<br>
>> Dear all,<br>
>><br>
>> GBIF has just published "Meeting Report: GBIF hackathon-workshop on<br>
>> Darwin Core and sample data (22-24 May 2013)" at<br>
>> <a href="http://www.gbif.org/orc/?doc_id=5424" target="_blank">http://www.gbif.org/orc/?doc_id=5424</a>. Now that this document is<br>
>> available for public reference, I would like to formally open the<br>
>> minimum 30-day comment period on two related new terms proposed<br>
>> during the workshop and defined in the referenced document.<br>
>><br>
>> The formal proposal would add the following new terms:<br>
>><br>
>> Term Name: abundance<br>
>> Identifier: <a href="http://rs.tdwg.org/dwc/terms/abundance" target="_blank">http://rs.tdwg.org/dwc/terms/abundance</a><br>
>> Namespace: http:/<a href="http://rs.tdwg.org/dwc/terms/" target="_blank">rs.tdwg.org/dwc/terms/</a><br>
>> Label: Abundance<br>
>> Definition: The number of individuals of a taxon found in a sample.<br>
>> This is typically expressed as number per unit of area or volume. In<br>
>> the case of vegetation and colonial/encrusting species, percent cover<br>
>> can be used.<br>
>> Comment: Examples: "4 per square meter", "0.32 per cubic meter",<br>
>> "24%". For discussion see<br>
>> <a href="http://code.google.com/p/darwincore/wiki/Occurrence" target="_blank">http://code.google.com/p/darwincore/wiki/Occurrence</a> (there will be no<br>
>> further documentation here until the term is ratified) Type of Term:<br>
>> <a href="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property" target="_blank">http://www.w3.org/1999/02/22-rdf-syntax-ns#Property</a><br>
>> Refines:<br>
>> Status: proposed<br>
>> Date Issued: 2012-03-01<br>
>> Date Modified: 2013-09-25<br>
>> Has Domain:<br>
>> Has Range:<br>
>> Refines:<br>
>> Version: abundance-2013-09-25<br>
>> Replaces:<br>
>> IsReplaceBy:<br>
>> Class: <a href="http://rs.tdwg.org/dwc/terms/Occurrence" target="_blank">http://rs.tdwg.org/dwc/terms/Occurrence</a><br>
>> ABCD 2.0.6: not in ABCD (someone please confirm or deny this)<br>
>><br>
>> Term Name: abundanceAsPercent<br>
>> Identifier: <a href="http://rs.tdwg.org/dwc/terms/abundanceAsPercent" target="_blank">http://rs.tdwg.org/dwc/terms/abundanceAsPercent</a><br>
>> Namespace: http:/<a href="http://rs.tdwg.org/dwc/terms/" target="_blank">rs.tdwg.org/dwc/terms/</a><br>
>> Label: Abundance as Percent<br>
>> Definition: 100 times the number of individuals of a taxon found in a<br>
>> sample divided by the total number of individuals of all taxa in the<br>
>> sample.<br>
>> Comment: Examples: "2.4%". For discussion see<br>
>> <a href="http://code.google.com/p/darwincore/wiki/Occurrence" target="_blank">http://code.google.com/p/darwincore/wiki/Occurrence</a> (there will be no<br>
>> further documentation here until the term is ratified) Type of Term:<br>
>> <a href="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property" target="_blank">http://www.w3.org/1999/02/22-rdf-syntax-ns#Property</a><br>
>> Refines:<br>
>> Status: proposed<br>
>> Date Issued: 2012-08-01<br>
>> Date Modified: 2013-09-25<br>
>> Has Domain:<br>
>> Has Range:<br>
>> Refines:<br>
>> Version: abundanceAsPercent-2013-09-25<br>
>> Replaces:<br>
>> IsReplaceBy:<br>
>> Class: <a href="http://rs.tdwg.org/dwc/terms/Occurrence" target="_blank">http://rs.tdwg.org/dwc/terms/Occurrence</a><br>
>> ABCD 2.0.6: not in ABCD (someone please confirm or deny this)<br>
>><br>
>> The related issues in the Darwin Core issue tracker are<br>
>> <a href="https://code.google.com/p/darwincore/issues/detail?id=142" target="_blank">https://code.google.com/p/darwincore/issues/detail?id=142</a><br>
>> and<br>
>> <a href="https://code.google.com/p/darwincore/issues/detail?id=187" target="_blank">https://code.google.com/p/darwincore/issues/detail?id=187</a><br>
>><br>
>> If there are any objections to the changes proposed for these new<br>
>> terms, or comments about their definitions, please respond to this<br>
>> message. If there are no objections or if consensus can be reached on<br>
>> any amendments put forward, the proposal will go before the Executive<br>
>> Committee for authorization to put these additions into effect after<br>
>> the public commentary period.<br>
>><br>
>> Cheers,<br>
>><br>
>> John<br>
>> _______________________________________________<br>
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>> <a href="http://lists.tdwg.org/mailman/listinfo/tdwg-content" target="_blank">http://lists.tdwg.org/mailman/listinfo/tdwg-content</a><br>
><br>
> --<br>
> Aaike De Wever<br>
> BioFresh Science Officer<br>
> Freshwater Laboratory, Royal Belgian Institute of Natural Sciences<br>
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</div></div></blockquote></div><br></div>