![]() In the early days of PDF people would use a Creator application like Microsoft Word to write a document, print it to a PostScript file and then the Producer would be Acrobat Distiller, the application that converted the PostScript file to a PDF. Producer – the product that created the PDF.Creator – the originating application or library.CreationDate – the date and time when the document was originally created.From PDF 1.1 onwards, these are the eight default keys that can optionally be filled in: It contains general information about a PDF file using a set of document info entries, simple pairs of data that consist of a key and a matching value. The Info Dictionary (or info dict) has been included in PDF since version 1.0.There are several mechanisms available within PDF files to add metadata: There are command-line tools to batch clean PDF files as well as companies that offer this type of service for a fee.The Callas pdfAutoOptimizer tool has a similar function. If you have the Enfocus Pitstop plug-in for Acrobat, it includes an action for removing metadata.When you are back at the Batch Sequences window run the sequence you just created, choose your files and let Acrobat do its thing. In the Output options window activate the PDF Optimizer option and click on Settings, edit the Optimizer settings as desired and name the settings. Click on New Sequence and name the new sequence (don’t worry about the Select sequence of commands box just click on the Output Options button at the bottom. ![]() If you need to clean dozens or hundreds of files, you can do so using the batch function of Acrobat Professional: select Advanced > Document Processing > Batch Processing. In the window that pops up select the Discard User Data option to the left and enable the Discard document information and metadata checkbox to the right. In Acrobat 9 Professional select Advanced > PDF Optimizer. To remove metadata in individual files, you can also use the PDF Optimizer option in Adobe Acrobat.This shows the most important metadata fields which you can delete by hand. If you have Adobe Reader select File > Properties which brings up the Document Properties window.This is sometimes a requirement for legal reasons or done because of security or privacy concerns. Metadata add value to a file but there may be circumstances where you want to remove them. I haven’t tested this one so cannot comment on its reliability or usefulness for print production beyond its file size limitation of 10 MB. There are also online tools, like PDF Candy, to edit metadata. Tools like Exiftool allow you to extract or embed the metadata. For very specific types of metadata, a plug-in might be available to facilitate data entry or provide users with clear guidelines and choices for entering data. PDF editing tools, such as Adobe Acrobat Professional, allow you to add metadata or edit them. Such information is embedded in PDF metadata fields when the layout is exported to PDF. ![]() In InDesign, for instance, you can use the ‘File Info’ menu option to define metadata such as the document title, description, author, keywords and copyright-related information. Many content creation applications, such as Microsoft Word, Adobe InDesign, or Adobe Photoshop, allow users to define metadata for its files. Professional content management systems can not just display metadata but also allow for extensive searches based on the keywords or description field. Theoretically operating systems should also be able to do this but while an operating system like Windows 7 is great at showing picture related metadata (such as the resolution, bit depths, keywords.) or music-related metadata (such as the artist, album, and genre), it fails to do so for PDF files. Adobe Bridge, for example, allows you to browse through folders containing PDF files and check basic metadata such as the author, description, and copyright of PDF files. Applications geared towards managing libraries of data can show metadata.
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