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18 wrz 2008 · A PDF document is a data structure composed from a small set of basic types of data objects. Sub-clause 7.2, "Lexical Conventions," describes the character set used to write objects and other syntactic elements. Sub-clause 7.3, "Objects," describes the syntax and essential properties of the objects.
6 lis 2022 · Fundamentally, A PDF file is an indexed collection of objects. A PDF object is a chunk of structured data — I’ll talk more about objects later. A PDF file consists of a header, a bunch of...
In this chapter, we leave behind the bits and bytes of the PDF file, and consider the logical structure. We consider the trailer dictionary, document catalog, and page tree. We enumerate the required entries in each object. We then look at two common structures in PDF files: text strings and dates.
14 gru 2018 · The two notions define the text on different levels: one is centered on the Latin, the other on the binary alphabet, and both definitions include hypertext, interactivity, and multimodality as...
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.
organize the data in an appropriate manner. The term data structure is used to denote a particular way of organizing data for particular types of operation. These notes will look at numerous data structures ranging from familiar arrays and lists to more complex structures
e-text (from "electronic text"; sometimes written as etext) is a general term for any document that is read in digital form, and especially a document that is mainly text. For example, a computer-based book of art with minimal text, or a set of photographs or scans of pages, would not usually be called an "e-text
