[OSM-talk] THIS is the kind of enthusiasm some would reject

[Dave F.]

On 12/09/2015 12:37, Colin Smale wrote:
> Rendering precedence is a different subject to tagging. You know what 
> happens to suggestions of tagging in a certain way for the purposes of 
> influencing the appearance of a map...

You're misunderstanding the purpose of tagging which is to allow 
renderers to differentiate entities & display them accurately & 
differently from each other.

*All* tagging is for the renderer, it's incorrect tagging that's frowned 
upon (natural=sand for golf bunkers is the popular example).


>
> A search on the wiki for pages with the word primary only returns hits 
> in connection with highway and schools. Can you help me out and give a 
> link to the page you are referring to?

Many pages list tags 'to be used in conjunction with...'

A good test is if you remove a tag & it fails to render then it's 
probably a primary tag. Sub tags allow you to add extra adjective 
attributes.

Example (made up one):
barrier=gate (primary)

Sub tags:
access=yes
type=5 bar
material=wood
colour=blue

Delete the sub tags & they'll probably still render. delete the primary 
& it won't.

Cheers
Dave F.


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