Message in Spanish (Español)
El atributo base '<var>Attribute</var>' cuyo uso = 'required' no tiene un atributo derivado correspondiente al redefinir el grupo de atributos '<var>X</var>'.
Unlocalized message
The base attribute '<var>Attribute</var>' whose use = 'required' does not have a corresponding derived attribute while redefining attribute group '<var>X</var>'.
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