Character translation tables exist to perform conversion specific
transformations. For example, in tt(html), the \tt('e) is written as
tt(&eacute;), but in LaTeX it's written as \tt('e). Rather than
using a potentially long if-else ladder to determine how to set a particular
character, a character translation table can be used. The character
translation table of a particular conversion is then activated only for that
type of conversion. 

Character table translations are used very late during the processing of
YODL's input file(s): it is the output generator that handles the character
translations. Consequently, macros or builtin function calls that might appear
in a character's redefinition element of a character table are not
expanded. In practice this never is a point of concern. In section
ref(CHARTABLES) the use of character translation tables is discussed in
detail.

