Preferred order of spans nucleus before satellite

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Preferred order of spans: nucleus before satellite Elaboration – usually first the nucleus (material being elaborated on) and then satellite (extra information) vs. satellite-nucleus Concession – usually the satellite (the although- type clause or span) before the nucleus
12 Relation names (in M&T 1988) Other classifications are possible, and longer and shorter lists have been proposed
13 Schemas They specify how spans of text can co-occur, determining possible RST text structures
14 Graphical representation A horizontal line covers a span of text (possibly made up of further spans A vertical line signals the nucleus or nuclei A curve represents a relation, and the direction of the arrow, the direction of satellite towards nucleus
15 How to do an RST analysis 1. Divide the text into units Unit size may vary, depending on the goals of the analysis Typically, units are clauses (but not complement clauses) 2. Examine each unit, and its neighbours. Is there a clear relation holding between them? 3. If yes, then mark that relation (e.g., Condition) 4. If not, the unit might be at the boundary of a higher-level relation. Look at relations holding between larger units (spans) 5. Continue until all the units in the text are accounted for 6. Remember, marking a relation involves satisfying all 4 fields (especially the Effect). The Effect is the plausible intention that the text creator had.
16 Some issues Problems in identifying relations Judgments are plausibility judgments. Two analysts might differ in their analyses Definitions of units Vary from researcher to researcher, depending on the level of granularity needed Relations inventory Many available Each researcher tends to create their own, but large ones tend to be unmanageable A theory purely of intentions In contrast with Grosz and Sidner’s (1986), it does not relate structure of discourse to attentional state. On the other hand, it provides a much richer set of relations.
17 Applications Writing research

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