how to get xml joint value and output in groovy

Please see if this is what you need?

def xml = new XmlParser().parseText(str)
def result = xml.'**'.findAll{it.@Type == 'abg'}
result.each { cool ->
	cool.'**'.findAll {it.@Tag == 'A'}.each {
		log.info "Type = ${cool.@Type} and Tag = ${it.@Tag}"   	
	}
}