It is not possible to nest if-then-else statements in the Word export templates:
<% if ConditionA %> <% if ConditionB %> <% else %> <% endif %> <% else %> <% if ConditionC %> <% else %> <% endif %> <% endif %>
According to CS89313 the statements can be rewritten (with AND condition), but that would create a huge number of statements, when using several conditions:
<% if (ConditionA) AND (ConditionB) %> <% elseif ConditionA %> <% elseif ConditionC %> <% else %> <% endif %>
My intentation was to check for empty fields and the apply different formatting in Word. But that would mean to check lots of combinations of fields with AND conditions resulting in a hugh template. The nesting of the statements would solve that problem. Actually I was very surprised, that such basic progamming techniques are not possible.