Open essvee opened 3 years ago
objectType used to be issue https://github.com/tdwg/cd/issues/64 - see thread under there for relevant discussion.
In the usage field I think you mean preparationType rather than preservationType. Constraints field doesn't seem correct either as it mixes the two terms.
Good spot, thanks @hardistyar - those are now updated.
There is a lot of overlap with the proposed materialSampleType https://github.com/tdwg/dwc/issues/345.
The proposed definition and vocabulary correspond nicely to the SpecimenType we're working on in iSamples. See the Decision tree for the vocabulary on GitHub. We're taking a broader cross domain view of the kinds of physical samples that are in scope, and not including information objects (which are linked to samples as related resources).
Is there a preparationType vocabulary somewhere? 'preparation' doesn't seem to be defined in DWC-- closest I can find is
preparations: A list (concatenated and separated) of preparations and preservation methods for a specimen.
This is circular and doesn't actually define 'preparation'....
@smrgeoinfo
You can see some ideas for some "possible vocabulary" in the Darwin Core Hour Presentation about the need for a preparations extension to DwC.
GGBN developed a preparation extension for DwC (and ABCD) years ago: https://terms.tdwg.org/wiki/GGBN_Preparation_Vocabulary
The usage and examples ob objectType are based on ggbn:materialSampleType (https://terms.tdwg.org/wiki/ggbn:materialSampleType). This term has been only created for using GGBN with DwC (ABCD already has a similar term) and will presumably changed to objectType in the next version of GGBN as the term name is much more generic.
Where is the definitions of a "preparation" that allows me to unambiguously distinguish a 'preparation' from any random 'object'? Can a preparation be something other than a 'materialSample'. Can a 'materialSample' ever be something other than a physical object (composed of matter, with defined boundaries)?
workflow: Physical thing in the world (living, dead, inorganic, whatever!...) --> collection event (continuant, ?tdwg occurrence???) --> preparation process (continuant, not endurant, could be no action, e.g. for a rock sample) --> preserved physical object --> assign identifier (now its a materialSample--the thing that's actually 'curated', i.e. saved somewhere) --> other preparation processes --> analyzed material sample (should have a new identifier) --> analysis process --> data. Analyzed material sample might be changed to a new material sample (or annihilated) by the analysis process. If there is something 'saved', it should have a new identifier.
How is preparation different from materialSample?
I'm looking at what's here from an outside user with a data modeling/ontology perspective, and experience managing geologic physical samples.
Seems that there are four fundamental facets of interest: what is the object, what is it composed of (material type), what is it a sample of (sampled feature), how was its collected/preserved?
have a look at http://www.cidoc-crm.org/Entity/E19-Physical-Object/version-7.1.1 for a good definition of physical object. A definition of objectType should be linked to a well defined concept of object (the domain of objectType).
tissue
,specimen
,culture
,rna
,mineral
,dna
,environmental sample
,HTS Library