Do any standard character entity declarations include the characters
used for transliteration of Arabic characters into roman - alif, ayn and
the dot below modifier [which as its name suggests puts a dot below
certain roman characters]?  They are required for rendering Arabic names
in roman characters, and so should not necessarily be part of an Arabic
character set (only the first two occur as Arabic characters).
 
Thank you
Richard Higgins
Durham University Library.