Hi Kirian,
You can use `instance('data-instance')/data/po[value = 'CC']/des[1]` (and `des[2]`… and so on). This means “take the nth `des`”. In you could also want to say “take the `des` such as `index = 1`, which would be `des[@index = '1']”. I hope this works for you,
Alex
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