id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
18382	usage=irrigation. Complains that railway tag missing.	malcolm@…	team	"==== What steps will reproduce the problem?
1. Apply usage=irrigation to a waterway
2. 
3. 

==== What is the expected result?
It is accepted as valid.

==== What happens instead?
It complains that ""railway"" is missing.

==== Please provide any additional information below. Attach a screenshot if possible.
Way: Levada Faja (132250115) is an example. (Not my tagging and I haven't checked the tagging for correctness)

{{{
URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2017-12-31 03:09:43 +0100 (Sun, 31 Dec 2017)
Build-Date:2017-12-31 02:33:46
Revision:13265
Relative:URL: ^/trunk

Identification: JOSM/1.5 (13265 en_GB) Windows 10 32-Bit
OS Build number: Windows 10 Home 1903 (18362)
Memory Usage: 376 MB / 989 MB (154 MB allocated, but free)
Java version: 1.8.0_191-b12, Oracle Corporation, Java HotSpot(TM) Client VM
Screen: \Display0 1280x800
Maximum Screen Size: 1280x800
Dataset consistency test: No problems found

Plugins:
+ imagery_offset_db (34109)
+ turnrestrictions (34109)

Last errors/warnings:
"	defect	closed	normal		Core validator		worksforme	template_report usage irrigation