# Normal YAML highlighting:
_parts:
srid: &srid "3857"
# YAML comment
world: &world
- -180
extents: &extents
extent: *world
srs-name: *srid
scale: 1
interactivity: false

Layer:
- id: water-lines-low-zoom
geometry: linestring
geometry2: "string"
Datasource:
<<: *osm2pgsql
table: |-
-- Highlighting the table SQL by including PostgreSQL highlighting:
(SELECT
way,
-- SQL comment
waterway,
CASE WHEN tags->'intermittent' IN ('yes')
OR tags->'seasonal' IN ('yes', 'spring', 'summer', 'autumn', 'winter', 'wet_season', 'dry_season')
THEN 'yes' ELSE 'no' END AS int_intermittent
FROM planet_osm_line
WHERE waterway = 'river'
) AS water_lines_low_zoom
properties:
minzoom: 8 # number
maxzoom: 11 # number