This is correct... largely it is used for
transfer of detailed single
specimen records.
That is not so
say you could not define some schema that reuses sections
of DwC or
the TDWG vocabularies - you probably would have to get into
custom
provider software in that case (although maybe the current
tools
would allow for it - Renato could give advice for TAPIRLink
on this).
Cheers
Tim
> Thanks a lot
for the information.
>
> I suppose when the record is
composed of multiple specimens (whose
>
number
> is recorded in ObservedIndividualCount) the individual
attributes of each
> specimen (age, sex, maturity, etc) cannot
be stored.
>
>
>
> Tomas
Bar
>
>
> On Fri, Nov 28, 2008 at 4:14 PM, Tim
Robertson <
trobertson@gbif.org>
>
wrote:
>
>> Hi T. Bar
>> You might consider
the OBIS extensions for Darwin Core since you are
>>
concerned with marine stuff.
>>
>>
http://iobis.org/obis/obis.xsd>>
>>
SampleSize: the size of the sample from which the
>>
collection/observation was drawn. It can be a volume (e.g. for
a
>> phytoplankton sample), a linear distance (e.g. for a
visual transect or
>> net haul), a surface area (e.g. for a
benthic core), etc. This field
>> must also include the
units, e.g. 200 mfor a transect, or 0.25 m^2 for a
>> benthic
grab (use ^ to denote a superscript). Note that when
multiple
>> collections/observations are reported from the
same physical sample, a
>> code identifying the sample can be
placed in the Field_Number field to
>> allow all
collections/observations from a single sample to be
connected.
>>
>>
>> IndividualCount is a
count of specimens (e.g. not a count of species).
>>
If
>> you want to indicate multiple species, then you would
have a record for
>> each
>> along with the
identification and the count of individuals of that
>>
species.
>>
>> So in the OBIS schema you
have:
>>
>> ObservedIndividualCount: The number of
individuals (abundance) found in
>> a collection/record
event.
>>
>>
>>
Cheers,
>>
>>
Tim
>>
>>
>>
>> On 28 Nov
2008, at 17:05, bar tomas wrote:
>>
>> Sorry
if this question is misplaced in this discussion list, but
I
>> haven't been able to find a mailing list on the
conceptual aspects of
>> Darwin
>>
Core.
>>
>>
>> I am interested to know if
there are any recommendations on how to
>> represent
abundance in Darwin Core. I have seen some datasets using
>>
IndividualCount and SampleSize. For instance, for a fishing
survey,
>> would
>> you use IndividualCount for the
number of species in a catch, and
>> SampleSize
>>
for the distance towed?
>>
>>
>> Thank you
very much
>>
_______________________________________________
>> tdwg-tapir
mailing list
>>
tdwg-tapir@lists.tdwg.org>>
http://lists.tdwg.org/mailman/listinfo/tdwg-tapir>>
>>
>>
>
____________________________________________________________
Tim
Robertson
Systems Architect
Global Biodiversity Information
Facility Secretariat (GBIF)
Universitetsparken 15, 2100
Copenhagen Ø, Denmark
http://www.gbif.orgtrobertson@gbif.orgPhone:
+45 35 32 14 87 (Office)
Fax: +45 35 32 14
80
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