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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