# 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