Some wiki engines offer markup for superscript and subscript text.
Creole: ^^This is superscripted text^^
or <<sup>>This is superscripted text<</sup>>
Proposed XHTML: <sup> </sup>
Creole: ~~This is subscripted text~~
or ,,This is subscripted text,,
or <<sub>>This is superscripted text<</sub>>
Note: the use of double-tilde may conflict with Escape Character Proposal
Proposed XHTML: <sub> </sub>
Comparison on wikimatrix: http://www.wikimatrix.org/syntax.php?i=29
- Basic maths
- Units of measurement (e.g. square meter - m²)
- Large numbers, metric scientific notation (e.g. 1,253x10²³)
- Ordinal numbers (e.g. 1^^st^^, 2^^nd^^, 18^^th^^ century, in French 1^^er^^, 2^^e^^, 18^^e^^ siècle)
- Possibly for footnotes (shouldn't it be handled by another mechanism than what is considered, in that particular case, as a presentation markup)
- Many indexed terms in science (like n^^+^^)
- Basic maths
- Basic chemistry
- Much of biology (gene names, etc.)
- Simple way to insert superscripted/subscripted text
- The users don't have to learn a new language.
- Super- and subscript are basic functions in most word processors
- Super- and subscript almost always have a semantic value, rather than being a formatting issue.
- Depending on the software/keyboard layout, it might be very difficult or impossible to insert Unicode superscript or subscript digits.
- Unicode digits:
- are limited to... digits! - thus covering only a small subset of use cases (⁽⁻ⁱ⁺ⁿ⁾⁼°ₔ₍ₐ₊ₑ₋ₓ₎₌ₒ)
- The presentation of successive Unicode digits is not always appropriate (see above of this source).
- MathML etc. is necessary for specialized applications, especially in Math. However:
- Complex formulas were historically expensive, and use in engineering and science therefore limited. Invention of symbols involving the no-cost super and subscript was much more frequent.
- In practive, MathML etc. is not currently supported, and does not correspond with the frequency of use of super- and subscript in engineering and science. LaTeX is, on the other hand, more common and known to many publishing in physics, engineering, or math (but few inther sciences).
- LaTeX is rendered very poorly in browsers which do not have built-in support for MathML, typically with coarse raster images, and font, size and aliasing mismatch.
- Inline with Cover the common things people need (is it?) - Yes!
- NotNew, a lot of wiki engines offer markup for superscript and subscript text. HTML offers it. But uses different markup.
- Better alternatives exist
- Please elaborate which alternatives are available in which Wiki software
- Wiki engines supporting LaTeX includes: MoinMoin, Oddmuse, MediaWiki, ... (add more)
- Wiki engines supporting image inclusion: practically all
- Wiki engines supporting simple ways to insert unicode characters/images (smileys): MoinMoin, Oddmuse, ... (add more)
- New markups to learn -- NotNew though.
- Users who already use the standard markups have to learn a yet another one.
- Markup characters can be hard to find on several keyboard layouts.
- The markup is hardly readable.