Second, our conversion algorithms are very advanced, but they cannot guarantee perfect quality, which very much depends on a document's content, its structure, internal semantics and so on.
#Redactor pdf online pdf
First of all, making a PDF document editable is a very complex computational task, it requires a lot of processing time, so such documents are opening much longer then of other formats.
This works whenever or not the PDF documents have textual layer, internal semantic structure (as described in PDF/A-1a, PDF/A-2a, and PDF/UA-1 formats), support search/find operations and so on. In order to make a PDF editable, the GroupDocs.Editor uses advanced and complex algorithms, optical recognition, machine learning, and so on, so on the result users are able to edit all content of the document like an ordinary WordProcessing or textual document. Moreover, it features some complex output functionality, such as document structure tags, encryption, digital signatures, and editable forms. It has a specific file structure, graphics model and font embedding. Also, the PDF format is rather complex by itself. Since these stages include complex computations, they are time-consuming.
Several stages of calculations are required in the process of converting a document to PDF, including the layout calculation.
This is similar to image formats, describing where the content is shown either in raster or vector form. Internally, the PDF format contains a description of every page, as well as drawing instructions, specifying the layout of the content on the page. Such a document format describes precisely where a document’s content is placed on every page. These applications typically produce so-called “fixed-page” format documents. Various document viewing or publishing applications allow users to open (Adobe Acrobat, XPS Viewer), and sometimes edit (Adobe InDesign) documents of specific formats. For that reason, editing PDF is an important feature of GroupDocs.Editor. PDF and XPS formats are very similar in their purposes and basic concepts, while internally they are quite different. The PDF format is a fixed-page format that is very popular among users and widely supported by various applications, because a PDF document looks the same on any device.
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