PDF forms that are viewed online within a Web browser maintain the same functionality as if they were viewed locally, including form submission functionality. For example, FDF can include incremental changes to the PDF file, digital signatures, and graphical data, but XFDF cannot. XFDF is an XML-encoded FDF that allows for hierarchical representation of field data, but it doesn't support as many types of data as FDF can. In addition to FDF, HTML, and text, all of which are options for submitting form data, Acrobat 5 and later also lets you submit an entire PDF file or its form field data in XFDF format.
See "Getting Help with Acrobat Forms and Scripts" below for more information. (The form fields in the PDF file into which the FDF data is being imported must directly correspond to the form fields in the FDF file.) You can use the FDF Toolkit to populate PDF form fields with data from a database. You can also use the FDF Toolkit to extract data from form fields to populate a database. If you send it to another location, that data can be imported into the form fields of a PDF file at that location. See "Using CGI Scripts to Collect FDF Information" below for more information.Īfter you create an FDF file, you can let another application parse it and populate a database with the information, or you can electronically send it to another location. You can also set up a form button to create an FDF file and send it to a Web address (URL). Choose Document > Fill-in Form if the creator of the PDF file enabled the Fill-In form feature. In Adobe Reader 6 and later, you can export form data from a PDF file.
You create FDF files in Acrobat by choosing Advanced > Forms > Export Forms Data (Acrobat 6 Professional) or File > Export > Form Data (Acrobat 5.x). FDF files are smaller than PDF files because they contain only form field data, not the entire form. FDF is a text file format specifically for data exported from PDF form fields. After the information has been added to form fields, you can gather information from the fields and save it in a Forms Data Format (FDF) file.
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