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Donald,<br>
<br>
With regards to the uncertainty about the meaning of dwc:basisOfRecord,
the proposed Darwin Core RDF Guide attempts to inject clarity into the
situation. It does so in two ways:<br>
<br>
1. It allows dwc:basisOfRecord to be used with literal (text) values to
allow existing implementations to expose whatever values they currently
have for that term. However, it specifies that rdf:type should be used
exclusively as the property for specifying URI-reference values
intended to indicate the type of the subject resource. [1] There is
some ambiguity about what the subject is of a dwc:basisOrRecord
property (the resource, or the record about the resource?). However,
there is no similar ambiguity about rdf:type which always serves to
indicate the class of which the subject resource is an instance.<br>
<br>
2. It specifies that classes in the Darwin Core Type vocabulary
namespace (dwctype: = <a class="moz-txt-link-freetext" href="http://rs.tdwg.org/dwc/dwctype/">http://rs.tdwg.org/dwc/dwctype/</a> ) should be used
for typing resources in the biodiversity domain rather than any
corresponding classes in the main Darwin Core namespace (dwc: =
<a class="moz-txt-link-freetext" href="http://rs.tdwg.org/dwc/terms/">http://rs.tdwg.org/dwc/terms/</a> ). [2] In other words, if given the
choice between dwc:Occurrence and dwctype:Occurrence, use
dwctype:Occurrence. The guide proposes to add to the type vocabulary
any classes which exist in the dwc: namespace and not in the dwctype:
namespace (e.g. dwc:Identification). The intention is that the DwC
type vocabulary would be what it's name suggests: the vocabulary for
describing types. There are some issues involving the current
definitions in the type vocabulary, which I won't go into in this
email. As Rich said earlier, this is a topic for one of the
Documenting Darwin Core sessions at the meeting.<br>
<br>
Although these guidelines would hold force specifically for RDF
implementations, this is a convention that could be followed in other
implementations. <br>
<br>
Steve<br>
<br>
[1]
<a class="moz-txt-link-freetext" href="http://code.google.com/p/tdwg-rdf/wiki/DwcRdfGuideProposal#2.3.1.4_Other_predicates_used_to_indicate_type">http://code.google.com/p/tdwg-rdf/wiki/DwcRdfGuideProposal#2.3.1.4_Other_predicates_used_to_indicate_type</a><br>
[2]
<a class="moz-txt-link-freetext" href="http://code.google.com/p/tdwg-rdf/wiki/DwcRdfGuideProposal#2.3.1.5_Classes_to_be_used_for_type_declarations_of_resources_de">http://code.google.com/p/tdwg-rdf/wiki/DwcRdfGuideProposal#2.3.1.5_Classes_to_be_used_for_type_declarations_of_resources_de</a><br>
<br>
Donald Hobern [GBIF] wrote:
<blockquote cite="mid:009701cec839$135212c0$39f63840$@gbif.org"
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<p class="MsoPlainText">Thanks, Rich.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Very pleased to see this. With this
encouragement, I'll say just a little bit more about why I think this
is a critical need.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">I see the model I describe as the perfect
real-world realisation of most of the key components in the GBIO
Framework (<a moz-do-not-send="true"
href="http://www.biodiversityinformatics.org/">http://www.biodiversityinformatics.org/</a>),
as follows:<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"
style="margin-left: 0.5in; text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">1.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Everyone zips up whatever data they have
from each resource (databases, field instruments, sequencers, data
extracted from literature, checklists, whatever) into a DwC Archive
using whatever DwC elements they can for data elements and describing
other elements not currently recognised in DwC (the GBIO DATA layer)<o:p></o:p></p>
<p class="MsoPlainText"
style="margin-left: 0.5in; text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">2.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->These archives should be placed in
repositories that offer basic services (DOIs, annotation services,
etc.) (the GBIO CULTURE layer)<o:p></o:p></p>
<p class="MsoPlainText"
style="margin-left: 0.5in; text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">3.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Harvesters assess the contents of each
archive and determine what views can be supported from the supplied
elements (occurrence records for GBIF, name usage records, species
interactions, etc.) and catalogue these views in relevant discovery
indexes (GBIF, Catalogue of Life, TraitBank, etc.) (the GBIO EVIDENCE
layer)<o:p></o:p></p>
<p class="MsoPlainText"
style="margin-left: 0.5in; text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">4.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Users can at any time annotate elements
in the archives to provide mappings for (potentially more recently
defined) DwC or other properties, opening up new options for reuse<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Donald<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">----------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoPlainText">Donald Hobern - GBIF Director -
<a class="moz-txt-link-abbreviated" href="mailto:dhobern@gbif.org">dhobern@gbif.org</a> <o:p></o:p></p>
<p class="MsoPlainText">Global Biodiversity Information Facility
<a class="moz-txt-link-freetext" href="http://www.gbif.org/">http://www.gbif.org/</a> <o:p></o:p></p>
<p class="MsoPlainText"><span lang="DA">GBIF Secretariat,
Universitetsparken 15, DK-2100 Copenhagen Ø, Denmark<o:p></o:p></span></p>
<p class="MsoPlainText">Tel: +45 3532 1471 Mob: +45 2875 1471 Fax:
+45 2875 1480<o:p></o:p></p>
<p class="MsoPlainText">----------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><span style="" lang="EN-US">-----Original
Message-----<br>
From: Richard Pyle [<a class="moz-txt-link-freetext" href="mailto:deepreef@bishopmuseum.org">mailto:deepreef@bishopmuseum.org</a>] <br>
Sent: Sunday, October 13, 2013 6:49 PM<br>
To: 'Donald Hobern [GBIF]'; 'TDWG Content Mailing List'<br>
Cc: 'Chuck Miller'<br>
Subject: RE: [tdwg-content] A plea around basisOfRecord (Was: Proposed
new Darwin Core terms - abundance, abundanceAsPercent)</span></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Hi Donald,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">MANY thanks for this! And you are certainly
not alone in your concerns about these issues. In fact, we have
planned a Symposium for “Documenting DarwinCore”<o:p></o:p></p>
<p class="MsoPlainText">(<a moz-do-not-send="true"
href="https://mbgserv18.mobot.org/ocs/index.php/tdwg/2013/schedConf/trackPolicies"><span
style="color: windowtext; text-decoration: none;">https://mbgserv18.mobot.org/ocs/index.php/tdwg/2013/schedConf/trackPolicies</span></a><o:p></o:p></p>
<p class="MsoPlainText">#track11), and one of the four sessions
(Session 3, to be precise) of the symposium focuses exactly on this
issue of basisOfRecord/dcterms:type/etc.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Another session (Session 2) will focus on
proposed and perhaps-to-be-proposed new classes (Individual,
MaterialSample, Evidence), and will start out with a series graphs
illustrating the existing high-level ontology and possible alternative
high-level ontologies, as you indicate in your items 3 & 4.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Aloha,<o:p></o:p></p>
<p class="MsoPlainText">Rich<o:p></o:p></p>
</div>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Steven J. Baskauf, Ph.D., Senior Lecturer
Vanderbilt University Dept. of Biological Sciences
postal mail address:
PMB 351634
Nashville, TN 37235-1634, U.S.A.
delivery address:
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If you fax, please phone or email so that I will know to look for it.
<a class="moz-txt-link-freetext" href="http://bioimages.vanderbilt.edu">http://bioimages.vanderbilt.edu</a>
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