why subview id prefixed in the h:message output?

Form valid开发者_Go百科ation error message contains subviewid:errormsg. I'm able to disactivate form id with prependId="false". how to suppress subviewid in h:message output?

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Specify the labels yourself by label attribute of <h:inputWhatever> component.

<h:inputText value="#{bean.username}" label="Username" />

It will then be used instead of client id in validation message.