--16-- 
the general "development" of paragraphs will be described 
in a later section. 
4.1~3. Discourse Relator (RELATOR~ Input to this 
procedure are (i) a dependent type, (2) a probability 
value, and (3) a restriction pattern. This procedure 
determines whether the given dependent type conflicts 
with the restrictions specified in the pattern. If no 
conflict is found, this procedure determines whether a 
word should be selected from the given dependent type 
based on the input probability value. If the selection of 
the dependent type conflicts with the restriction pattern, 
or if the dependent type fails the probability test, no 
word will be selected from the dependent type. 
4.1.4. ~CRITERIA~. Whenever, during any stage of 
sentence generation, the selection of one word from a 
list of candidates is required, this procedure determines 
which criteria should be applied to control the selection. 
All criteria (implemented principles of cohesion to be 
described in a later section) are presented to the genera- 
tion program in the form of a table that reweights the 
probabilities. The generation program increases or de- 
creases the probability of selecting words on the basis of 
the values in this table. It has the following format 
I 
(Fig. 3): each entry is specified by a ser0~ntic class or 
a specific word followed by a positive or negative value.