Hi Everyone,
I was scared to read this thread, but it turned out to be fun. Despite the excellent clarification that occurred, I still have some questions. In relation to the proposal below (to introduce the terms MaterialSample, and MaterialSampleID):
1. Given that the decision was made to put MaterialSample in the "dwctype" namespace, why is the definition still "The category of information pertaining to the physical results of a sampling event …"? Shouldn't the definition be "The physical results of a sampling event ..."?
(Ramona pointed this out in a message that didn't get posted to the list, but which Rich responded to [1].)
2. I believe Steve asked why there needs to be a MaterialSampleID, when none of the other dwctype terms (preservedSpecimen, etc.) have IDs. JohnD gave a sound defence of MaterialSampleID [2], but his reasoning seems to apply equally to preservedSpecimenID, DigitalStilImageID, etc. Did I miss the explanation of why MaterialSamples are so different from the other dwctype terms? Or is the idea that we will define, e.g.,
dwctype:preservedSpecimen rdfs:subClassOf dwctype:MaterialSample
so that preservedSpecimens will inherit MaterialSampleIDs ?
3. In RDF, all resources are identified by URI, and (should be) referenced by appropriate predicates (hasIndividual, hasOccurrence, etc.) So my understanding is that all the recent discussion about xxxIDs pertains only to non-RDF records. Is that correct?
Many thanks for the clarification already provided, and for any yet to come -
Joel.
1. http://lists.tdwg.org/pipermail/tdwg-content/2013-May/003008.html
2. http://lists.tdwg.org/pipermail/tdwg-content/2013-May/003006.html
On Sat, 25 May 2013, John Deck wrote:
Steve,
Thanks for your comments. Responding to both of your emails here.
We’ve removed the class and now have just the MaterialSample dwctype and a materialSampleID property.
dwctype:MaterialSample refines http://purl.obolibrary.org/obo/OBI_0000747. Also, we’ve updated
materialSampleID to be a new term in the dwc/terms namespace instead of referencing the MiXS namespace. In
our original proposal, we suggested using the MIxS RDF namespace for this property, however, the GSC did
not make MIxS-as-RDF a standard, as decided recently at GSC15, so we’ve chosen not to use that term (by
convention) and instead propose creating our own materialSampleID property in the dwc/terms namespace. (A
side note: the GSC is still very much interested in MIxS as RDF and we’ll continue to maintain and
implement https://code.google.com/p/mixs-as-rdf/ in conjunction with the MIxS developers).
Modification to proposed terms:
Term Name: MaterialSample
Identifier: http://rs.tdwg.org/dwc/dwctype/MaterialSample
Namespace: http:/rs.tdwg.org/dwctype/
Label: Material Sample
Definition: The category of information pertaining to the physical results of a sampling (or subsampling)
event. In biological collections, the material sample is typically collected, and either preserved or
destructively processed.
Comment: For discussion see http://code.google.com/p/darwincore/wiki/DwCTypeVocabulary (there will be no
further documentation here until the term is ratified)
Type of Term: http://www.w3.org/2000/01/rdf-schema#Class
Refines: http://purl.obolibrary.org/obo/OBI_0000747
Status: proposed
Date Issued: 2013-03-28
Date Modified: 2013-05-25
Has Domain:
Has Range:
Refines:
Version: MaterialSample-2013-05-25
Replaces:
IsReplaceBy:
Class:
ABCD 2.0.6: not in ABCD (someone please confirm or deny this)
Term Name: materialSampleID
Identifier: http://rs.tdwg.org/dwc/terms/MaterialSampleID
Namespace: http://rs.tdwg.org/dwc/terms/
Label: Material Sample ID
Definition: An identifier for the MaterialSample (as opposed to a particular digital record of the material
sample). In the absence of a persistent global unique identifier, construct one from a combination of
identifiers in the record that will most closely make the materialSampleID globally unique.
Comment: For discussion see http://code.google.com/p/darwincore/wiki/MaterialSample (this page will not
exist until the term is ratified).
Type of Term: http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
Refines: http://purl.org/dc/terms/identifier
Status: proposed
Date Issued: 2013-03-28
Date Modified: 2013-05-25
Has Domain:
Has Range:
Version: materialSampleID-2013-05-25
Replaces:
IsReplaceBy:
Class: http://rs.tdwg.org/dwc/terms/Occurrence
ABCD 2.0.6: not in ABCD (someone please confirm or deny this)
John D. and John W.
On Mon, May 20, 2013 at 7:39 PM, Steve Baskauf <steve.baskauf@vanderbilt.edu> wrote:
Here is the second question. The proposal proposes a new MaterialSample class
http://rs.tdwg.org/dwc/terms/MaterialSample
which is in the "main" (dwc:=http://rs.tdwg.org/dwc/terms/ ) namespace. I guess my question is
why we need this class. I can definitely see a rational for a new class defined as part of the
DwC type vocabulary (i.e. dwctype:MaterialSample). It would be used to type resources that are
material samples. But the class terms in the main (dwc:) namespace are used as a convenient
way to group DwC property terms that might reasonably be used with instances of that class.
However, there really aren't any such terms.
We already have a convention in which not every type vocabulary class term has a corresponding
class term in the main (dwc:) namespace. There are dwctype:PreservedSpecimen,
dwctype:LivingSpecimen, dwctype:FossilSpecimen, dwctype:HumanObservation,
dwctype:MachineObservation, and dwctype:NomenclaturalChecklist, none of which have dwc:
namespace analogues. So why does MaterialSample need a dwc: namespace analog?
Steve
John Wieczorek wrote:
Dear all,
TDWG could see a lot of activity in 2013 in anticipation of the meeting in Florence
in October. Much of the activity is related to enabling integration across multiple
parts of our domain. We have the Audubon Core under review for biodiversity-related
media and an impending RDF Guide to supplement the already extant Text and XML
Guides for Darwin Core.
This message is to bring your attention to another integrative initiative, to
introduce terms into Darwin Core that will form a nexus between Occurrences and the
interesting things that happen with physical materials that result from them, such
as, but not limited to, genetic sequencing. A series of meetings for a little over
the past year have inspired our colleagues in the Genomics Standards Consortium
(GSC) to propose to their constituency to align their terms with Darwin Core,
including adopting some of the Darwin Core terms in place of their own that have
the same meaning. Out of these discussions has come the realization that neither
community has terms to accommodate the concept of an identifiable (objectively, not
taxonomically), trackable material sample. This message constitutes such a
proposal.
This proposal would have no impact on those publishing purely taxonomic data. It
would also have no impact on those publishing occurrence data unless they want to
increase their capacity to distinguish material samples from organisms more
rigorously than is now possible using only the dwc:preparations term.
The initial request for new terms can be found in the Darwin Core Issue tracker as
http://code.google.com/p/darwincore/issues/detail?id=167. Below I have elaborated
nad formalized the request into the three distinct terms under consideration,
initiating the 30 day minimum public review process to seek consensus on their
inclusion in the Darwin Core standard. Your job, should you choose to accept it, is
to discuss the merits or any perceived problems in the inclusion of these three
terms in Darwin Core.
Below I will give the proposed properties of three terms as they would appear in
the Darwin Core Quick Reference Guide, though these properties would be included in
the RDF of the normative form of the documentation.
A new MaterialSample class: This is for the purpose of organizing properties, just
as the existing classes (Occurrence, Event, Location, GeologicalContext,
Identification, Taxon, etc.) do, without having any terms declare this class as
their domain.
Term Name: MaterialSample
Identifier: http://rs.tdwg.org/dwc/terms/MaterialSample
Namespace: http:/rs.tdwg.org/dwc/terms
Label: Material Sample
Definition: The category of information pertaining to the physical results of a
sampling (or subsampling) event. In biological collections, the material sample is
typically collected, and either preserved or destructively processed, with the
intention of being representative of a greater whole.
Comment: For discussion see http://code.google.com/p/darwincore/wiki/MaterialSample
(this page will not exist until the term is ratified).
Type of Term: http://www.w3.org/2000/01/rdf-schema#Class
Refines:
Status: proposed
Date Issued: 2013-03-28
Date Modified: 2013-04-08
Has Domain:
Has Range:
Version: MaterialSample-2013-03-28
Replaces:
IsReplaceBy:
Class:
ABCD 2.0.6: not in ABCD (someone please confirm or deny this)
A Darwin Core Type Vocabulary value for basisOfRecord is needed to represent this
new class of information. Luckily, a term already exists in the Ontology for
Biomedical Investigations
(http://www.ontobee.org/browser/rdf.php?o=OBI&iri=http://purl.obolibrary.org/obo/OBI_0000747).
We and the GSC both propose to reuse this class within Darwin Core as below, making
it the cross-ver point between the two domains.
Term Name: MaterialSample
Identifier: http://rs.tdwg.org/dwc/terms/MaterialSample
Namespace: http://purl.obolibrary.org/obo/OBI_0000747
Label: material sample
Definition: A material entity that has the material sample role
Comment: For discussion see
http://code.google.com/p/darwincore/wiki/DwCTypeVocabulary (there will be no
further documentation here until the term is ratified)
Type of Term: http://www.w3.org/2000/01/rdf-schema#Class
Refines:http://purl.obolibrary.org/obo/OBI_0100051
Status: recommended
Date Issued: 2013-03-28
Date Modified: 2013-03-28
Has Domain:
Has Range:
Version: MaterialSample-2013-03-28
Replaces:
IsReplaceBy:
Class:
ABCD 2.0.6: not in ABCD
In keeping with all other classes in Darwin Core, the Material Sample class would
have a corresponding identifier property. The Genomics Standards Consortium (GSC)
is in the process of proposing this term. If it is accepted, we propose to use it,
and its properties would be as below, otherwise, the properties would be the same,
but have the Darwin Core namespace and identifier URI.
Term Name: materialSampleID
Identifier: http://gensc.org/ns/mixs/materialSampleID
Namespace: http://gensc.org/ns/mixs
Label: Material Sample ID
Definition: An identifier for the MaterialSample (as opposed to a particular
digital record of the material sample). In the absence of a persistent global
unique identifier, construct one from a combination of identifiers in the record
that will most closely make the materialSampleID globally unique.
Comment: For discussion see http://code.google.com/p/darwincore/wiki/MaterialSample
(this page will not exist until the term is ratified).
Type of Term: http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
Refines: http://purl.org/dc/terms/identifier
Status: proposed
Date Issued: 2013-03-28
Date Modified: 2013-04-08
Has Domain:
Has Range:
Version: materialSampleID-2013-03-28
Replaces:
IsReplaceBy:
Class: http://purl.obolibrary.org/obo/OBI_0000747
ABCD 2.0.6: not in ABCD (someone please confirm or deny this)
--
Steven J. Baskauf, Ph.D., Senior Lecturer
Vanderbilt University Dept. of Biological Sciences
postal mail address:
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