Andy,
Yes, your understanding of the /chemicals_of_this_type is correct. It is used to classify "instance of this type" ... and not "part of" parent-child relationships. Here is the actual definition used in Freebase:
Chemical compounds that are included in this classification
However, there are a few assumption errors in the data (Object/Values), that I agree probably need to be corrected later.
Not sure how chemists classify a component of a Thing, i.e., the following statements need to be analyzed and understood by a chemist, but then there are layman concepts that should also probably be held in a new Wikidata property if the community finds it useful to explain chemicals:
" It is one of the two components of starch, the other being amylose. " " Starch branching enzyme https://en.wikipedia.org/wiki/Starch_branching_enzyme introduces 1,6-alpha glycosidic bonds between these chains, creating the branched amylopectin. "
Thad +ThadGuidry https://www.google.com/+ThadGuidry
On Thu, Jun 18, 2015 at 7:50 AM, Andy Mabbett andy@pigsonthewing.org.uk wrote:
On 17 June 2015 at 20:17, Thomas Pellissier-Tanon thomaspt@google.com wrote:
@Andy
It seems to me that, before the dats can be imported, we'll need to add several new Wikidata properties. Was that your intention?
feel free to start the property creation process. I'm still at Google for 8 weeks so we have
time
to go throw the property creation process.
I'm happy to do that; but I may need some help with knowing what is meant by each property. For example:
https://www.freebase.com/chemistry/chemical_classification/chemicals_of_this...
seems to be saying that Amylopectin is (in Wikidata terms) an "instance of" (P31) a starch, but that doesn't seem right.
Also, properties which require data-types that have not yet been set up, such as measurements, will have to wait for those data types to become available. That won't occur within eight weeks.
-- Andy Mabbett @pigsonthewing http://pigsonthewing.org.uk
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