Modeling F0 contours of arbitrarily long and complex sentences of the Greek language may prove to be a difficult task if one considers the various parameters involved, namely focus, position of the prominent vowel within words, syntactic structure and type of expression. None the less, this complexity may be significantly reduced if the expressive requirements of the application area in mind are taken into account. Study of the expressive requirements of the information broadcasting applications revealed that the affirmative type of expression is heavily used and regardless of size and complexity, each sentence-spanning contour may be co-mposed of only four word-spanning patterns. This result not only leads to significant savings in the resources required for a natural sounding speech output but also indicates a highly structured intonative component.