mapnik/tests/data/csv/nulls_and_booleans_as_strings.csv

x,y,null,boolean
0,0,null,true
0,0,,false
csv: back off of null and boolean detection since using strings is more predictable across rows 2011-11-02 11:07:59 -04:00			`x,y,null,boolean`
			`0,0,null,true`
			`0,0,,false`