For a recent client project, we were having an issue with using superscript to display the number next to a disclaimer information. In HTML this is accomplished by simply wrapping a <sup> tag around the text. For example: "<sup>1</sup> The client wants a disclaimer here." looks like:
1 The client wants a disclaimer here.
However, Flash does not support superscripts or subscripts in HTML text out of box, so a "hack" of some sort needed to be applied
Looking around I found two solutions. The first is fairly old (2007/2008) and uses a combination of some regular expression magic to convert <sup> and <sub> tags into HTML <font> tags. The solution next used an extra set of embedded fonts that were created for superscirpt and subscript. Here is the blog post for reference.
This solution is a reasonable but requires the process of embedding two extra fonts into the application to get the desired result.
The second approach was to use the Text Layout Framework (TLF) in Flex 4 and take advantage of the baselineShift property to create subscript and superscript text. See this Adobe blog for reference.