When setting a value, you also have to pass along a suggested namespace prefix, as this can’t be generated automatically. PSPDFKit exposes two constants for common namespaces:ĭocumentPdfMetadata#XMP_PDF_NAMESPACE/ DocumentPdfMetadata#XMP_PDF_NAMESPACE_PREFIX - the XMP PDF namespace created by Adobe §3.1ĭocumentXmpMetadata#XMP_DC_NAMESPACE/ DocumentXmpMetadata#XMP_DC_NAMESPACE_PREFIX - the Dublin Core namespace You can define your own namespace or use one of the already existing ones. Use DocumentXmpMetadata to work with the metadata stream containing XMP data.Įach key in the XMP metadata stream has to have a namespace set. set(metadataKey, PdfValue( 3))ĭocument.saveIfModified() DocumentPdfMetadata pdfMetadata = document.getPdfMetadata() the Author), you can use the following code snippet: To get an entry of the metadata dictionary (e.g. When dealing with these predefined keys, it’s recommended to use the DocumentPdfMetadata getters and setters so that you get out-of-the-box conversions from objects such as Date. You can, of course, add any supported key-value dictionary to the metadata. Use DocumentPdfMetadata to work with the dictionary-based metadata in a PDF.Īll values specified in the PdfValue are represented by the following types:īy default, the dictionary metadata may contain the following information keys: To give you full access to all the PDF metadata, PSPDFKit comes with DocumentPdfMetadata and DocumentXmpMetadata, which allow you to retrieve or modify a document’s metadata. Please contact us directly by e-mail and we will try to help you with this issue.Metadata may be stored in a PDF document in two ways: in a document information dictionary associated with the document, or in a metadata stream containing XMP data. All attributes edited using PDF Attributes was shown in the Reader DC. We conducted a test with the latest version of Adobe Acrobat Reader DC (2017.012.20093) for Windows, and everything works fine. Under Windows XP or earlier, the Shell uses the called Column Handler extension to show files metadata in the Windows Explorer details view columns. The additional attributes that can be extracted and displayed are: Meta Data Field Name, Field Code. Unlike normal PDF, PDF/A requires that everything necessary to precisely rendering the document is contained in the PDF/A file, including fonts, colour profiles, images and so on. I would like to apologize for any inconvenience that you encountered while using the PDF Attributes. Only PDF files will display this information. PDF/A is an ISO-standardized subset of PDF that eliminates certain risks to the future reproducibility of the content. The app doesn’t actually change anything. When the font is TTF and the width factor is 1.0 the text in the drawing (not just attributes, but any text) can be captured in the PDF as text, making it searchable and whatever else you may do with text. For those that gave his app a 5-star rating, run some tests of your own between platforms and see what results you get. 'Attribute' in AutoCAD parlance is a piece of text associated with a block. Whatever properties this tool alters are not the real metadata being examined by the operating system. The given code examples are categorized into multiple sections based on the functionality they achieve. iText library helps in dynamically generating the. When we re-examined the meta-data properties of the various documents, we found that nothing was actually changed and all the original tags were still there. In this iText tutorial, we are writing various code examples to read a PDF file and write a PDF file. We edited several PDF documents on the Mac using this app and then transferred the files over to Windows. Been looking for something like this for a while now, so thanks to the devs for venturing into this space.
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