Bill Mann's Extented Relation Set

This page provides recognition criterion for the rhetorical relations used by Bill Mann. It was lifted from his RST web site (with permission). This page is from the 7th Jan 2000 version. Updated versions may be available from his site. See here.


 The RST relation definitions
Bill Mann

The set of tables below names the relations of so called CRST, "Classical RST" as Nick Nicholas calls it. It has been augmented with four relations defined more recently.

Click on a relation name to see the definition on this page. Each element of the definition is implicitly embedded in a constraint formula as follows: "It is plausible to the analyst that it was plausible to the author that ... ."

The tables which are reached by clicking a relation name give the relation definitions for each relation of CRST. The added relations are Means, Preparation, Unconditional and Unless.

On terminology in definitions: N stands for nucleus, S for satellite, W for writer (author, speaker) and R for reader (hearer.) For some brevity: in many places, N and S stand for the situations presented by N and S; N and S never stand for the text of N or S. Situation is a broad cover term that ranges over propositions or beliefs, actions whether realized or not, desires to act and approval for another to act. Similarly, positive regard is a broad attitudinal term that ranges over belief, approval of ideas, desire to act, and approval for another to act, all identifiably positive. Positive regard and belief (with its cognates), and plausible above are all degree terms, not binary.
 
 
 
Subject-Matter Relations
Relation Name
Circumstance
Condition
Elaboration
Evaluation
Interpretation
Means
Non-volitional Cause
Non-volitional Result
Otherwise
Purpose
Solutionhood
Unconditional
Unless
Volitional Cause
Volitional Result
Presentational Relations
Relation Name
Antithesis
Background
Concession
Enablement
Evidence
Justify
Motivation
Preparation
Restatement
Summary
 
Multinuclear Relations
Relation Name
Contrast
Joint
List
Restatement
Sequence

As with the names above, the definitions (conditions to be affirmed by the observer) are organized into tables for presentational relations, subject-matter relations and multinuclear relations.
 
Definitions of Presentational Relations 
Relation Name Constraints on either S or N individually Constraints on N + S  Intention of W
Antithesis on N: W has positive regard for N N and S are in contrast (see the Contrast relation); because of the incompatability that arises from the contrast, one cannot have positive regard for both of those situations; comprehending S and the incompatability between the situations increases R's positive regard for N R's positive regard for N is increased
Background on N: R won't comprehend N sufficiently before reading text of S S increases the ability of R to comprehend an element in N R's ability to comprehend N increases
Concession on N: W has positive regard for N on S: W is not claiming that S does not hold;  W acknowledges a potential or apparent incompatability between N and S; recognizing the compatability between N and S increases R's positive regard for N R's positive regard for N is increased
Enablement on N: presents an action by R (including accepting an offer), unrealized with respect to the context of N R comprehending S increases R's potential ability to perform the action in N R's potential ability to perform the action in N increases
Evidence on N: R might not believe N to a degree satisfactory to W on S: R believes S or will find it credible R's comprehending S increases R's belief of N R's belief of N is increased
Justify none R's comprehending S increases R's readiness to accept W's right to present N R's readiness to accept W's right to present N is increased
Motivation on N: N is an action in which R is the actor (including accepting an offer), unrealized with respect to the context of N  Comprehending S increases R's desire to perform action in N R's desire to perform action in N is increased
Preparation none S precedes N in the text; S tends to make R more ready, interested or oriented for reading N R is more ready, interested or oriented for reading N
Restatement none on N + S: S restates N, where S and N are of comparable bulk; N is more central to W's purposes than S is. R recognizes S as a restatement of N
Summary on N: N must be more than one unit  S presents a restatement of the content of N, that is shorter in bulk R recognizes S as a shorter restatement of N

 
Definitions of Subject-matter Relations
Relation Name Constraints on either S or N individually Constraints on N + S  Intention of W
Circumstance on S: S is not unrealized S sets a framework in the subject matter within which R is intended to interpret N  R recognizes that S provides the framework for interpreting N
Condition on S: S presents a hypothetical, future, or otherwise unrealized situation (relative to the situational context of S)  Realization of N depends on realization of S R recognizes how the realization of N depends on the realization of S
Elaboration none S presents additional detail about the situation or some element of subject matter which is presented in N or inferentially accessible in N in one or more of the ways listed below. In the list, if N presents the first member of any pair, then S includes the second: set :: member abstraction :: instance whole :: part process :: step object :: attribute generalization :: specific R recognizes S as providing additional detail for N. R identifies the element of subject matter for which detail is provided.
Evaluation none on N + S: S relates N to degree of W's positive regard toward N.  R recognizes that S assesses N and recognizes the value it assigns
Interpretation none on N + S: S relates N to a framework of ideas not involved in N itself and not concerned with W's positive regard  R recognizes that S relates N to a framework of ideas not involved in the knowledge presented in N itself
Means on N: an activity  S presents a method or instrument which tends to make realization of N more likely R recognizes that the method or instrument in S tends to make realization of N more likely
Non-volitional Cause on N: N is not a volitional action  S, by means other than motivating a volitional action, caused N; without the presentation of S, R might not know the particular cause of the situation; a presentation of N is more central than S to W's purposes in putting forth the N-S combination. R recognizes S as a cause of N
Non-volitional Result on S: S is not a volitional action  N caused S; presentation of N is more central to W's purposes in putting forth the N-S combination than is the presentation of S. R recognizes that N could have caused the situation in S
Otherwise on N: N is an unrealized situation on S: S is an unrealized situation  realization of N prevents realization of S R recognizes the dependency relation of prevention between the realization of N and the realization of S
Purpose on N: N is an activity; on S: S is a situation that is unrealized  S is to be realized through the activity in N R recognizes that the activity in N is initiated in order to realize S
Solutionhood on S: S presents a problem N is a solution to the problem presented in S; R recognizes N as a solution to the problem presented in S
Unconditional on S: S conceivably could affect the realization of N N does not depend on S R recognizes that N does not depend on S
Unless none S affects the realization of N; N is realized provided that S is not realized R recognizes that N is realized provided that S is not realized
Volitional Cause on N: N is a volitional action or else a situation that could have arisen from a volitional action  S could have caused the agent of the volitional action in N to perform that action; without the presentation of S, R might not regard the action as motivated or know the particular motivation; N is more central to W's purposes in putting forth the N-S combination than S is. R recognizes S as a cause for the volitional action in N
Volitional Result on S: S is a volitional action or a situation that could have arisen from a volitional action  N could have caused S; presentation of N is more central to W's purposes than is presentation of S; R recognizes that N could be a cause for the action or situation in S

 
Definitions of Multinuclear Relations
Relation Name Constraints on each pair of N Intention of W
Contrast no more than two nuclei; the situations in these two nuclei are (a) comprehended as the same in many respects (b) comprehended as differing in a few respects and (c) compared with respect to one or more of these differences R recognizes the comparability and the difference(s) yielded by the comparison is being made
Joint none none
List An item comparable to others linked to it by the List relation  R recognizes the comparability of linked items
Multinuclear Restatement An item is primarily a reexpression of one linked to it; the items are of comparable importance to the purposes of W R recognizes the reexpression by the linked items
Sequence There is a succession relationship between the situations in the nuclei R recognizes the succession relationships among the nuclei.