Hi Tommaso,
Here's what you should do:
- have a source file that contains your tags (typically an MS Word file)
- process your MS word file using the COM object model: analyze your file content and replace every tag by a hyperlink.
- generate a PDF file from your MS Word file, using a PDF converter that is able to properly handle hyperlinks in Office docs (Adobe PDFGenerator is one of these, but some PDF converters that use a printer driver or use a temporary postcript file do not convert hyperlinks)
-jerome