Talk:Q12880211

Hi, @Arpyia! Brown coal = lignite, also "mining of coal and lignite" = "mining of (hard) coal and brown coal" = "mining of coal". "Les multiples ne doivent pas être utilisés sans nécessité" ©d'Ockham Leon II (talk) 07:11, 25 May 2022 (UTC)[reply]

Bonjour, La différence entre les deux éléments est que l'un concerne le processus de production, et l'autre concerne l'activité économique au sens des classifications économiques. Arpyia (talk) 16:16, 25 May 2022 (UTC)[reply]

Il y a aussi coal industry (Q1778629) (duplicate de mining of coal and lignite (Q112117881)?). --Infovarius (talk) 13:30, 26 May 2022 (UTC)[reply]

@Infovarius. It's not a duplicate. Roughly, "coal industry" = "coal mining" + "coal processing" + "coal usage". Actually, I'm arguing that the duplicates are element mining of coal (Q12880211) and element mining of coal and lignite (Q112117881).--Leon II (talk) 17:21, 30 May 2022 (UTC)[reply]

@Arpyia. 05 Mining of coal and lignite: "This division includes the extraction of solid mineral fuels through underground or open-cast mining and includes operations (e.g. grading, cleaning, compressing and other steps necessary for transportation etc.) leading to a marketable product." Introduction to Section B: "Mining and quarrying include the extraction of minerals occurring naturally as solids (coal and ores), liquids (petroleum) or gases (natural gas). Extraction can be achieved by different methods such as underground or surface mining, well operation, seabed mining etc. This section includes supplementary activities aimed at preparing the crude materials for marketing, for example, crushing, grinding, cleaning, drying, sorting, concentrating ores, liquefaction of natural gas and agglomeration of solid fuels. These operations are often accomplished by the units that extracted the resource and/or others located nearby. Mining activities are classified into divisions, groups and classes on the basis of the principal mineral produced. Divisions 05, 06 are concerned with mining and quarrying of fossil fuels (coal, lignite, petroleum, gas); divisions 07, 08 concern metal ores, various minerals and quarry products. Some of the technical operations of this section, particularly related to the extraction of hydrocarbons, may also be carried out for third parties by specialised units as an industrial service which is reflected in division 09." Je ne vois ici aucune différenciation entre le processus de production et l'activité économique.--Leon II (talk) 17:21, 30 May 2022 (UTC)[reply]

Bonjour, La différence entre le processus de production et l'activité économique est conceptuelle, ce sont deux objets de connaissance différents. Les deux définitions ne se recouvrent pas car la nomenclature statistique utilise d'autres critères que la nature de la production pour définir l'activité. Le texte que vous citez en donne justement des exemples. Par exemple, la division 05 de la NACE (Q112117881) désigne une activité économique dont les acteurs peuvent aussi pratiquer des supplementary activities, différentes du processus de production qui est décrit ici (Q12880211). En revanche certains acteurs contribuant à ce processus de production ne sont pas inclus dans la division 05 car ils sont classés dans la division 09, sur la base d'un autre critère économique. Arpyia (talk) 09:58, 2 June 2022 (UTC)[reply]