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5. Manipulating PDF Files > 64. Get and Set PDF Metadata

Get and Set PDF Metadata

Add document information to your PDF, even without using Acrobat.

Traditional metadata includes things such as your document’s title, authors, and ISBN. But you can add anything you want, such as the document’s revision number, category, internal ID, or expiration date. PDF can store this information in two different ways: using the PDF’s Info dictionary [Hack #80] or using an embedded Extensible Metadata Platform (XMP) stream. When you change the PDF’s title, authors, subject, or keywords using Acrobat, as shown in Figure 5-13, it updates both of these resources. Acrobat 6 also enables you to export or import PDF XMP datafiles. Visit http://www.adobe.com/products/xmp/ to learn about Adobe’s XMP.


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