org.zkoss.zul.numberFormat
From Documentation
Property:
org.zkoss.zul.numberFormat
Applicable: globally in zk.xml via <library-property> not as <custom-attribute>
Default: ##,##0.## [Since 5.0.9]
It specifies the default format when the locale of the NumberInputElement is specified.
Note: if the format is specified already, this setting won't take effect.