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class=htdocs/facture.class.php}}
class=htdocs/facture.class.php}}
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* An invoice line has type product or service (you choose if both module [[Products]] and [[Services]] are activated).
* An invoice line represent a product into an invoice (with a unit price, a qty, a vat and a discount)
* An invoice line represent a product into an invoice (with a unit price, a qty, a vat and a discount)
* Each invoice has between 1 and n invoice lines
* Each invoice has between 1 and n invoice lines