DynaPDF Manual - Page 186

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Function Reference

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Although PDF files in older formats of FacturX, ZUGFeRD, and XRechnung can still be created, new

applications should always create invoices in the latest version of the standard. Note also that

ZUGFeRD 2.1 or higher and FacturX are technically identically defined in PDF. The PDF container

cannot distinguish between these formats.

Remarks:

Associated files are supported since PDF 2.0 and in PDF/A 3 files. In PDF/A 3 files all embedded

files must be associated with a PDF object.

Return values:

If the function succeeds the return value is 1. If the function fails the return value is 0.

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