Can we add ruby characters?

The ruby characters are not the same as superscript and subscript in fonts.

Here is a link to the case for ruby for presenting Kanji: http://rishida.net/blog/?p=469

for compound Kanji ( Jukugo, 熟語 ) text presentation.

Here is an English article and here one in Nihon-go ( 日本語 ).

Can we add ruby characters as a text option in curl10 ?