User talk:DmitTrix

Welcome to Wikidata, DmitTrix!

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Best regards! Taketa

Mount Bachelor

You reverted my edit on Mount Bachelor, but as far as I can see, this mounting is located in the US. So therefor I didn't really get your point, or I missed where I was wrong. Can you please advice (maybe there is something for me to learn, or maybe I was right after all, I'm just curious now!). Regards, Edoderoo (talk) 22:22, 20 December 2014 (UTC)

Hi! The "instance of" property's description states: "this item is a specific example and a member of that class". Obviously, "USA" is an entity by its own (a country/state), not a name for a class or group of similar objects. For an example of the relation that this property describes, think of Earth being an instance of inner planets, or Ford Model T being one of car models. As of Mount Bachelor, it is a mountain or, more precisely, a volcano. To add the country that the mountain is located in, you should have used the "country" property (I've added it now). DmitTrix (talk) 07:07, 21 December 2014 (UTC)

Ouch, good that I asked! P31 was the wrong property set. I need to check more of my work yesterday. It should have been country, P17 instead! Good for pointing this out, thanksss! Edoderoo (talk) 08:20, 21 December 2014 (UTC)

You're welcome! DmitTrix (talk) 09:38, 21 December 2014 (UTC)

Peroxy acid

You revert my edit without explanation. Please explain why Peroxy acid is not an instance of functional group? This is not obviously an instance of chemical classification. How can peroxy acid classify chemicals? The group of peroxy acid and the rest? Have a look at en:chemical classification to see what kind of thing can be a classification: functional classification, pharmacological/biological classification,... Peroxy group is an instance of functional group and functional group is used in chemical classification. Please consider the title of the item Peroxy acid and NOT Peroxy acids. This item is for the group of atoms having the structure -COOH and not for all chemical having that kind group in their structure. Snipre (talk) 16:56, 20 March 2015 (UTC)

Hi! First, I did provide an explanation (see my edit's description). Anyway, Peroxy acid is not a functional group. Second, you're right, it's also not an instance of chemical classification. I have edited it and marked it as an instance of 'acid'; IMHO, that's the most correct definition. Regards, DmitTrix (talk) 17:57, 20 March 2015 (UTC)

It can't be "instance of" only "subclass of": instance of is the last object in the definition line. Peroxy acid represents several chemicals like peroxymonosulfuric acid which is an instance of peroxy acid and ... acid. So how peroxy acid can be an instance too ? Then your comment is not an explanation: why peroxy acid is not considered as functional group ? "IMHO, that's the most correct definition", based on what ? Your opinion is not a reference. Please look at the WP articles and remark that all of them are defining the functional group of peroxy acid and most articles are categorized as functional group. I agree we have a problem of definition but this should be discussed. Snipre (talk) 09:05, 23 March 2015 (UTC)

Well, you're right on "subclass of"; my bad, thanks for correcting me. As of the functional group matter, a peroxy acid is not a functional group by itself, it is a complete chemical compound (just read what a functional group is). Peroxy acids do contain the –OOH functional group; a substance is classified as a peroxy acid if it contains that group. I guess that the Wikipedia articles are categorized under "Functional groups" category because there is no separate article on –OOH group (like, for example, there are ones on –OH and –CH₃ groups). I think you should remove that "instance of" statement; it's just like calling automobile an "instance of" internal combustion engine, for example. DmitTrix (talk) 10:08, 23 March 2015 (UTC)

Hi Snipre! So what do you think about removing the "instance of" statement? Regards, DmitTrix (talk) 11:32, 30 March 2015 (UTC)

Hi! Since you haven‘t responded, I went on and deleted that statement. DmitTrix (talk) 20:49, 1 April 2015 (UTC)

instance of

Hello, could you explain the correct usage of instance of (P31) and has part(s) (P527)? [1] I'm trying to relate the following astronomical events:

• astronomical transit (Q6888)
  • Transit of Mercury (Q247899)
    • transit of Mercury, 2016 (Q21522690)
  • transit of Venus (Q185203)
    • transit of Venus, 1639 (Q3537644)
    • Transit of Venus, 1769
      • 1769 Transit of Venus observed from Tahiti (Q4553059)
    • transit of Venus, 1874 (Q3537642)
      • 1874 Transit of Venus Expedition to Campbell Island (Q4555461)
      • 1874 Transit of Venus Expedition to Hawaii (Q4555462)
      • Passage de Venus (Q20992221)
    • transit of Venus, 1882 (Q3537646)
    • transit of Venus, 2004 (Q1148320)
    • transit of Venus, 2012 (Q1201935)
    • transit of Venus, 2117 (Q4382104)

I'm unclear what the proper way to do this is. The May 9, 2016 event is an example of Transit of Mercury is an example of Astronomical Transit. Is there a property to indicate examples or instances of a group of events? --Mu301 (talk) 22:08, 6 February 2016 (UTC)

• Hi! Here is my understanding (I'm not an experienced Wikidata editor; just doing small edits here and there).

An example for has part(s) (P527) could be human body (Q23852) having, or being composed of, head (Q23640), torso (Q160695), and other parts.

A transit might be said to "have parts" like the first/second/third/fourth contact (see e.g. w:en:Transit (astronomy)#Contacts), although I don't think there is any sense to going in such details; but it can't be said to be composed of specific transit types like transit of Venus over Sun (the general concept of "transit" does not "have them as parts / building blocks").

For specific transit types, you could say that they are "instances of" the general concept of "transit" (like it is defined e.g. in transit of Venus (Q185203)). For a specific occurrence, you could say it is an instance of the respective transit type (e.g. transit of Venus, 1639 (Q3537644) is an instance of transit of Venus (Q185203)).

Hope this helps. Best regards, DmitTrix (talk) 13:41, 7 February 2016 (UTC)

disambigs

If an item has instance of (P31)Wikimedia disambiguation page (Q4167410), it mustn't be merged with any regular item. Naphthylamine (Q1964890) describes a disambiguation page, naphthylamine (Q107307900) describes a group of compounds and is a part of chemical classification in WD. Also, I see no problems regarding sitelinks or Commons link in these two items, everything is in proper items. Wostr (talk) 00:11, 26 September 2021 (UTC)

• Yeah, you're right, my bad… DmitTrix (talk) 05:58, 26 September 2021 (UTC)