The Opera Show Format (OSF) is a set of conventions used in a web page using
XHTML
Extensible HyperText Markup Language (XHTML) is part of the family of XML markup languages. It mirrors or extends versions of the widely used HyperText Markup Language (HTML), the language in which Web pages are formulated.
While HTML, prior ...
1.0 Strict and
CSS
Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language such as HTML or XML (including XML dialects such as SVG, MathML or XHTML). CSS is a cornerstone techno ...
2.1. It is designed to allow
presentations
A presentation conveys information from a speaker to an audience. Presentations are typically demonstrations, introduction, lecture, or speech meant to inform, persuade, inspire, motivate, build goodwill, or present a new idea/product. Present ...
to be easily created with web authoring tools. OSF requires that a number of meta tags be present, including ''version'', ''generator'', ''author'', and ''presdate'' (the creation or presentation date). The entire presentation, including all slides and images (in
data: URIs) is contained in a single file. The look of all slides is controlled by the layout section, contained in a
<div class="layout"> HTML element
An HTML element is a type of HTML (HyperText Markup Language) document component, one of several types of HTML nodes (there are also text nodes, comment nodes and others). The first used version of HTML was written by Tim Berners-Lee in 1993 ...
. The slides themselves are contained in a presentation section contained in a
<div class="presentation"> element. Each slide is contained in a
<div class="slide"> element.
Tools
The Slide Show (S9) Ruby gem creates OSF-compatible presentations using a
wiki-style markup language. Other tools include the
Windows
Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for serv ...
-based QuickShow, and the Project Velt Opera widget. Opera Software once provided an online OSF generator, which has since gone offline. An older version is available at the personal site of Opera Software's
CTO,
Håkon Wium Lie
Håkon Wium Lie (born July 26, 1965) is a Norwegian web pioneer, a standards activist, and the Chief Technology Officer of Opera Software from 1998 until the browser was sold to new owners in 2016. He is best known for developing Cascading Styl ...
.
OperaShow Generator
/ref>
See also
* S5 (file format)
S5 (''Simple Standards-Based Slide Show System'') is an XHTML-based file format for defining slideshows. It was created by Eric A. Meyer as an alternative to the browser-centric Opera Show Format. S5 is not a presentation program, but fulfills th ...
— compatible with the Opera Show Format, designed to be used in additional browsers.
References
External links
Creating presentations/slideshows with HTML & CSS
{{OperaBrowser
Opera Software
Presentation software
Semantic HTML
XML-based standards
ru:Возможности браузера Opera#Opera Show Format