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Whitington - PDF Explained

Here you can read online Whitington - PDF Explained full text of the book (entire story) in english for free. Download pdf and epub, get meaning, cover and reviews about this ebook. City: Beijing;Sebastopol;Calif, year: 2012;2011, publisher: OReilly Media, genre: Home and family. Description of the work, (preface) as well as reviews are available. Best literature library LitArk.com created for fans of good reading and offers a wide selection of genres:

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PDF Explained: summary, description and annotation

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At last, heres an approachable introduction to the widely used Portable Document Format. PDFs are everywhere, both online and in printed form, but few people take advantage of the useful features or grasp the nuances of this format. This concise book provides a hands-on tour of the worlds leading page-description language for programmers, power users, and professionals in the search, electronic publishing, and printing industries. Illustrated with lots of examples, this book is the documentation you need to fully understand PDF. Build a simple PDF file from scratch in a te.;Table of Contents; Preface; Who Should Read This Book; Organization of Contents; Content Updates; May 22, 2012; Acknowledgments; Conventions Used in This Book; Obtaining Code Examples; Using Code Examples; Safari Books Online; How to Contact Us; Chapter 1. Introduction; A Little History; Page Description Languages; Other page description languages; Development of PDF; Some Advantages of PDF; Random access and linearization; Stream creation and incremental update; Embedded fonts; Searchable text; ISO Standardization; Specialized Kinds of PDF; PDF/A; PDF/X; Version Summary; Whats in a PDF?

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PDF Explained
John Whitington
Published by OReilly Media

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A Note Regarding Supplemental Files

Supplemental files and examples for this book can be found at http://examples.oreilly.com/0636920021483/. Please use a standard desktop web browser to access these files, as they may not be accessible from all ereader devices.

All code files or examples referenced in the book will be available online. For physical books that ship with an accompanying disc, whenever possible, weve posted all CD/DVD content. Note that while we provide as much of the media content as we are able via free download, we are sometimes limited by licensing restrictions. Please direct any questions or concerns to .

Preface

The Portable Document Format (PDF) is the worlds leading page description language, and the first format equally useful for print and online use.

PDF documents are now almost ubiquitous in the printing industry, in document interchange, and in the online distribution of paginated content. They are, however, widely viewed as opaque and delicate and are poorly understood, even by those of a technical disposition.

This is partly due to a perplexing lack of documentation; the file format reference is freely available, but is of a size and complexity which requires a time investment unlikely to be plausible for the majority of those working with PDF.

This book aims to be an approachable introduction. It is suitable both for the technically-minded, and for those who just want to understand a little of the PDF format to give context to their work with tools which produce or process PDF documents.

Who Should Read This Book

Weve tried to write a book which serves as a general introduction, with some optional technical interludes, giving you the chance to type in example PDF files and see how they display.

This book is suitable for:

  • Adobe Acrobat users who want to understand the reasons behind the facilities it provides, rather than just how to use them. For example: encryption options, trim and crop boxes, and page labels.

  • Power users who want to use command-line software to process PDF documents in batches by merging, splitting, and optimizing them.

  • Programmers writing code to read, edit, or create PDF files.

  • Industry professionals in search, electronic publishing, and printing who want to understand how to use PDFs metadata and workflow features to build coherent systems.

Organization of Contents

In this chapter, we give a history of the PDF format and put it into context. We look at the advantages PDF has over similar technologies, introduce specialized kinds of PDF files such as PDF/X and PDF/A, and take a brief tour of the elements which comprise a typical PDF document. We conclude by looking at how PDF is used in industry.

We begin in earnest, building a simple PDF file from scratch in a text editor. We show how to process this into a fully valid PDF and open it in a PDF viewer. We explain each component of the file, taking our first look at various parts of the PDF syntax.

In this chapter, we describe the layout and content of a PDF file, and the syntax of the objects from which it is built. We describe how a PDF document is read from a flat file into a structured format and, conversely, written from that structured format to a flat file.

In this chapter, we leave behind the bits and bytes of the PDF file, and consider the logical structure of its objects, describing how pages and their resources are arranged into a document.

We describe how to create vector graphics and raster images in PDF, and how to deal with transparency, color spaces, and patterns. We illustrate with examples, showing the code and the result in a PDF viewer.

In this chapter, we look at the PDF operators for building and showing text strings using different fonts and sizes, and how to build lines and paragraphs. We describe the different types of fonts and encodings in PDF documents, and how they are defined and used. We look at the process of text extraction from a PDF document.

Here, we discuss topics not directly related to the visual appearance of the document, but to ancillary data: bookmarks, metadata, hyperlinks, annotations, and file attachments. For each, we describe how they are defined in PDF and give examples.

We look at how encryption and document permissions work in PDF, and see how to inspect encryption information in Adobe Reader. We describe how programs which process PDF files read, write, and edit encrypted documents.

In this chapter, we show how to use the popular pdftk program for the command-line processing of PDF files, looking at common usage scenarios. We describe what a program such as pdftk has to do internally to achieve certain tasks (for example, merging or splitting documents).

Here, we describe both Adobe and open-source software for viewing, converting, editing, and programming with PDF files. We give sources of further documentation and other resources such as support and discussion forums.

Acknowledgments

I should like to thank my editor, Simon St.Laurent, who was enthusiastic about this project from the beginning.

Conventions Used in This Book

The following typographical conventions are used in this book:

Italic

Indicates new terms, URLs, email addresses, filenames, and file extensions.

Constant width

Used for program listings, as well as within paragraphs to refer to program elements such as variable or function names, databases, data types, environment variables, statements, and keywords.

Constant width bold

Shows commands or other text that should be typed literally by the user.

Constant width italic

Shows text that should be replaced with user-supplied values or by values determined by context.

Caution

This icon indicates a warning or caution.

Obtaining Code Examples

All the PDF code examples in this book are available for download in a zip archive from the OReilly website. The text of the book contains enough information to reconstruct these examples (with the exception of encrypted documents, which are not suitable for typing in manually).

The examples include the PDF source for the figures in this book.

Using Code Examples

This book is here to help you get your job done. In general, you may use the code in this book in your programs and documentation. You do not need to contact us for permission unless youre reproducing a significant portion of the code. For example, writing a program that uses several chunks of code from this book does not require permission. Selling or distributing a CD-ROM of examples from OReilly books does require permission. Answering a question by citing this book and quoting example code does not require permission. Incorporating a significant amount of example code from this book into your products documentation does require permission.

We appreciate, but do not require, attribution. An attribution usually includes the title, author, publisher, and ISBN. For example:

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