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#Socat tutorial pdf pdf#
#Socat tutorial pdf full#

A font-embedding/replacement system to allow fonts to travel with the documents.

An equivalent subset of the PostScript page description programming language but in declarative form, for generating the layout and graphics.

#Socat tutorial pdf pdf#

In later PDF revisions, a PDF document can also support links (inside document or web page), forms, JavaScript (initially available as a plugin for Acrobat 3.0), or any other types of embedded contents that can be handled using plug-ins.

Raster graphics for photographs and other types of images.

Vector graphics for illustrations and designs that consist of shapes and lines.

Typeset text stored as content streams (i.e., not encoded in plain text).

ISO 32000-2 does not include any proprietary technologies as normative references.Ī PDF file is often a combination of vector graphics, text, and bitmap graphics. 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.

#Socat tutorial pdf full#

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. 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. Adobe Systems made the PDF specification available free of charge in 1993.