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ISO 32000-2 does not include any proprietary technologies as normative references. In December 2020, the second edition of PDF 2.0, ISO 32000-2:2020, was published, including clarifications, corrections and critical updates to normative references. Many of them are also not supported by popular third-party implementations of PDF. These proprietary technologies are not standardized and their specification is published only on Adobe's website.
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PDF 1.7, the sixth edition of the PDF specification that became ISO 32000-1, includes some proprietary technologies defined only by Adobe, such as Adobe XML Forms Architecture (XFA) and JavaScript extension for Acrobat, which are referenced by ISO 32000-1 as normative and indispensable for the full implementation of the ISO 32000-1 specification.
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In 2008, Adobe published a Public Patent License to ISO 32000-1 granting royalty-free rights for all patents owned by Adobe that are necessary to make, use, sell, and distribute PDF-compliant implementations. PDF was a proprietary format controlled by Adobe until it was released as an open standard on July 1, 2008, and published by the International Organization for Standardization as ISO 32000-1:2008, at which time control of the specification passed to an ISO Committee of volunteer industry experts. In the early years PDF was popular mainly in desktop publishing workflows, and competed with a variety of formats such as DjVu, Envoy, Common Ground Digital Paper, Farallon Replica and even Adobe's own PostScript format.
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The PDF specification also provides for encryption and digital signatures, file attachments, and metadata to enable workflows requiring these features.Īdobe Systems made the PDF specification available free of charge in 1993. PDF files may contain a variety of content besides flat text and graphics including logical structuring elements, interactive elements such as annotations and form-fields, layers, rich media (including video content), three-dimensional objects using U3D or PRC, and various other data formats. The last edition as ISO 32000-2:2020 was published in December 2020. PDF was standardized as ISO 32000 in 2008.
PDF has its roots in "The Camelot Project" initiated by Adobe co-founder John Warnock in 1991.
Based on the PostScript language, each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, vector graphics, raster images and other information needed to display it.
Convert PDF document to Word, Excel, PNG, JPG, RTF, TXT, HTML or XML.Append - Insert another file (entire files or specific page ranges) into the existing file.Extract - Extract the desired pages to create a new PDF.Add text comments, text boxes, and hyperlinks to PDF files.Markup with highlight, underline, strikeout.Adding annotations, removing annotations, editing annotations.Bookmark specific pages or sections of PDFs.Search text, zoom in, zoom out & Presentation Mode.Horizontal or Vertical scroll, Single Page or Continuous scroll modes.Supported Formats: PDF, PS, Tiff, CHM, DjVu, Images, DVI, XPS, ODT, Fiction Book, Comic Book, Plucker, EPub, Fax It's a powerful app for viewing, printing, editing and annotating PDFs. PDF X is the free PDF reader & editor 2022 for windows, an alternative to adobe acrobat reader.