I haven't added `pipeline=substation` . `substance=` is used with it.

Please use `abandoned:highway=path` to avoid others re-adding it again. It's still shown on other maps.

Originally it is worded as "It is better to use the name of the substance transported with the key substance=*" osm.wiki/w/index.php?title=Tag:man_made=pumping_station&oldid=1881857

`substance=` is general standard used for all features, and "approved" formally. There are only 3.5k `pumping_station=` .

The wiki is not a bible. It's obviously self-conflicting to say those are "The activity in which the station is involved". What is the `=water` or `=gas` used for? Drinking and cooking, electricity generation, or heating? "The actual substance processed" is a better definition, and that's using `substance=` already.

Please don't change `substance=` to `pumping_station=` . This is a meaningless duplicate. man_made=pumping_station#Tags_used_in_combination

`landuse=` is about the use. Not zoning or laws.

`=headrace` is used for hydropower only. It's not applicable.

Please don't delete `landuse=residential` . They are valid data.

As I have said before, please don't change the `name=` to compose housing estate + building name. This is an application issue.

We touched upon this issue now changeset/142112318

Please don't remove the `addr:street=` . They are done for a specific purpose for HK. Street naming usually applies until the gore, so the section is actually Lion Rock Tunnel Rd. But logically and routing-wise, it should be considered Shatin Rd. However, using `official_name=` is unclear.

Eg Ma Chai Hang Rd rounabout's street naming is Ma Chai Hang Rd.

Street naming is inconsistent. See Fung Mo Street.
It can also be incomplete. Many road sections don't have a street name gazetted or signposted.
The incompleteness and inconsistency can play together when addressing doesn't follow the absence of street naming.
Another clear example is how `=roundabout` is described to not have names internationally unless it is the junction name itself. But HK applies the road name to all roundabouts.

No, don't say you are copying from Google. This is not allowed. It's a copyright infringement.
I don't agree. Street names don't decide anything. In fact, `*_link=` is described to not have names internationally, which is not applicable. In Hong Kong, the street naming have a very specific organization that defies routing expectation. For example, on slip roads, the name of the main line applies until the gore. Then routing will be confused unless it evaluates the name afterwards.

It's not about the physical design, or whether it is an "exit" or "entrance" . Contrary to Google Maps, which has many other arguably bad designs.

It is not without controversy. You can read the aftermath of some strong words. osm.wiki/Talk:Highway_link#Y_Junctions_should_NOT_be_classified_as_links
Fung Mo St has a u-turn. Then `_link`=* shows it diverges into 2. But Ching Tak St doesn't.
Would you do the same if it connects to Lung Cheung Rd at 90 degrees? What is the reason for the difference? Determining purely based on whether it curves is not consistent and useful.
Another comparison can be made at roundabouts. You won't change the eastern end of Fung Tak Rd to `=secondary_link` simply because it splits at the end, would you?
This can be compared with divided roads. Hypothetically if Shatin Pass Rd is only channelized by an island near the Fung Tak Rd junction, suddenly it has to be considered as a `=secondary_link` , despite having no other significant difference with reality.

2. `=drain` is for useless water. Piped and reservoir transfer water are clearly not that.

Please check that `=canal` includes water conveyance. It is not the usual meaning of canals for ships only.

Please don't change a `=mini_roundabout` point to ` =roundabout` line.