id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
19504	Better documentation of mapcss validator rules syntax	skyper	team	"Currently, there is no page for the validator rules mapcss syntax. Everything is documented at [wikitr:/Help/Styles/MapCSSImplementation MapCSSImplementation]. This leads to problems, as some specific validator parts like `throwError` is not explained at all and any complex example for validator rules is missing. Additionally, it is not clear which part is valid for rules at all and the context is spread across the big page.

Could we somehow update the situation, please, like explicitly mentioning validator one the relevant parts and adding examples for both, styles and rules, could enhance the situation.

E.g.
* I miss a concrete example with `regexp_match` and `throwWarning` using parts of it of the message.
* Why are expressions not handled within `throwWarning` and how to nicely get the values of tags which appear in a negative regexpression?

Thanks a lot."	enhancement	new	normal		Wiki content			mapcss validator rules