In this section I will offer a relatively brief outline of the three appraisal sub-systems: ATTITUDE , ENGAGEMENT and GRADUATION . The purpose here is to give an overall sense of how the appraisal system is formulated and the types of semantic issues it equipped to deal with. A more detailed account of all the sub-systems will be provided in later sections, The practical objective of this section is to provide the basic text-analytical tools by which the three appraisal systems can be identified and distinguished.
