[Imports] Birmingham City Council tree import

[Andy Mabbett]

On 15 May 2017 at 15:36, Martin Koppenhoefer <dieterdreist at gmail.com> wrote:

>> - form is not an established key, it seems there is no docu about it, not
>> even a proposal. Capitalized values are not common for formal values.
>> Is this a problem? Not aware that using a tag requires all this.  If it's
>> a problem then I can substitute tree_form which is more explicit

> the point is, while a mapper can use any tags he wants, an import shouldn't
> introduce any new tags but rather use established tags in a way they are
> already defined.

Where was this "rule" agreed and where is that documented? What is the
justification for it?

> "min_age" relates to the min_age of the people attending the feature.
> It is defined like this.

Since no people "attend" trees, this would appear to be a wholly
unnecessary distinction.

>> - what is usrn? Usually we don't use abbreviations in tags.  Already
>> explained in the original post: Unique Street Reference Number. Suggestions
>> have been to use ref:usrn
>
>
>
> IMHO there shouldn't be an abbreviation in the tag name, generally, there
> shouldn't even be a foreign key at all.

If "usrn" is the name used for the ID by the source, it seems
perfectly reasonable to use the same name in OSM.