[basex-talk] dynamic number of attributes

I would like to create an xml element that will have dynamic number of attributes, something like this where n will change and $value_1 to $value_2 will be provided by outside element book { attribute isbn_1 {$value_1} attribute isbn_2 {$value_2} attribute isbn_3 {$value_3} . . . attribute isbn_n {$value_n} } Can we do it? Thanks