Opera Show Format

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title: "Opera Show Format" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["opera-software", "presentation-software", "semantic-html", "xml-based-standards"] topic_path: "technology/web" source: "https://en.wikipedia.org/wiki/Opera_Show_Format" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::data[format=table title="Infobox file format"]

Field	Value
name	Opera Show Format
extension	.xhtml, .html
mime	application/xhtml+xml
text/html
owner	Opera Software
genre	Presentation program
extended from	XHTML 1.0 Strict
extended to	S5 (file format)
url	Creating presentations/slideshows with HTML & CSS
::

| name = Opera Show Format | icon = | logo = | screenshot = | caption = | extension = .xhtml, .html | mime = application/xhtml+xml text/html | type code = | uniform type = | magic = | owner = Opera Software | released = | latest release version = | latest release date = | genre = Presentation program | container for = | contained by = | extended from = XHTML 1.0 Strict | extended to = S5 (file format) | standard = | free = | url = Creating presentations/slideshows with HTML & CSS The Opera Show Format (OSF) is a set of conventions used in a web page using XHTML 1.0 Strict and CSS 2.1. It is designed to allow presentations 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 [HTML element](html-element). The slides themselves are contained in a presentation section contained in a element. Each slide is contained in a `` element.

Tools

The Slide Show (S9) Ruby gem creates OSF-compatible presentations using a wiki-style markup language. Other tools include the Windows-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.

References

References

1. "Alternatives to PowerPoint". [[WebAIM]].
2. Farwell, Jennifer. (September 2006). "PowerPoint Alternatives". [[PC Today]].
3. Luoma, Timothy J.. "30 Days to Becoming an Opera Lover".
4. Luoma, Timothy J.. "From closed to open...".
5. Luoma, Timothy J.. "How (and why) It Was Done".
6. "Slide Show (S9)".
7. "QuickShow".
8. [http://widgets.opera.com/widget/6367/ Project Velt]
9. "OperaShow Generator".

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::