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clarify what merging means

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Sarah Hoffmann
2025-07-29 23:04:14 +02:00
parent f300b00c2d
commit 69e882096c
1 changed files with 7 additions and 5 deletions
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docs/customize/Import-Styles.md
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@@ -125,8 +125,10 @@ value without key, then this is used as default for values that are not listed.
`set_main_tags()` will completely replace the current main tag configuration
with the new configuration. `modify_main_tags()` will merge the new
configuration with the existing one. Otherwise, the two functions do exactly
the same.
configuration with the existing one. Merging is done at value level.
For example, when the current setting is `highway = {'always', primary = 'named'}`,
then `set_main_tags{highway = 'delete'}` will result in a rule
`highway = {'delete', primary = 'named'}`.
!!! example
``` lua
@@ -143,9 +145,9 @@ the same.
when it has a value of `administrative`. Objects with `highway` tags are
always included with two exceptions: the troll tag `highway=no` is
deleted on the spot. And when the value is `street_lamp` then the object
must have a name, too. Finally, if a `landuse` tag is present then
it will be used independently of the concrete value when neither boundary
nor highway tags were found and the object is named.
must also have a name, to be included. Finally, if a `landuse` tag is
present then it will be used independently of the concrete value when
neither boundary nor highway tags were found and the object is named.
##### Presets