tree/tree.go
func GetAttributeVal(n Elem, local, space string) (string, bool) {
	attr, ok := GetAttribute(n, local, space)
	return attr.Value, ok
}
func GetAttributeVal(n Elem, local, space string) (string, bool) {
	attr, ok := GetAttribute(n, local, space)
	return attr.Value, ok
}
//GetAttributeVal is like GetAttribute, except it returns the attribute's value.