真有意思[ZU14.CN]

File Extension XFDL stands for "Extensible Forms Description Language", and is also a class of the Extensible Markup Language, also known as "XML". The File Extension XFDL format is nearly the same as the XML format, except that XFDL offers far more options in regards to security, making it ideal for those who wish to create legally binding documents and forms.

The XFDL format is also considered "human readable", making it easier to program secure forms, and it is also "open standard", meaning that the format is not proprietary and is publicly available, with various rights to use associated with it. The XFDL format supports multiple digital signatures, plus those signatures can be applied to specific sections of a form in order to prevent changes to signed content.

PureEdge provides a XFDL viewer that can function as a standalone viewer or be integrated into an existing web browser. Another XFDL viewer that can be used in lieu of the PureEdge viewer is IBM Lotus Forms, which comes in a full featured trial version that is valid for 60 days. Forms that are received in the XFD format can also be opened and viewed with this product. While it is highly unlikely that this format can be used to transmit and spread viruses and other malware, it is always advisable to take caution and only open these files if they are from trusted sources. Spam e-mail that prompts you to view an XFDL file may contain malicious content and should not be opened.

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