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Planning Coherent Multisentential Text Disclosure Number: IPCOM000128686D
Original Publication Date: 1988-Dec-31
Included in the Prior Art Database: 2005-Sep-16
Document File: 9 page(s) / 31K

Publishing Venue

Software Patent Institute

Related People

Eduard H. Hovy: AUTHOR [+3]


The goal of this paper is to describe a method of planning paragraphs to be coherent while avoiding unintended spurious effects that result from the juxtaposition of unrelated pieces of text.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 14% of the total text.

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Planning Coherent Multisentential Text

Eduard H. Hovy

ISI Reprint Series ISIIRS-88-208 April 1988

University 0 fSouthern California

Reprinted from Proceedings of the 26th Meeting of the ACL Buffalo, New York, 1988.

INFORMATION SCIENCES INSTITUTEIj4: fl 2131822-1511 Admiralty WaylMarina del ReylCalifornia 90292-6695 This research is sponsored by the Defense Advanced Research Projects Agency under Contract No. MDA903-81-C-0335. Any opinions, findings, conclusions or recommendations expressed in this publication are those of the author and should not be interpreted as representing the official opinion of DARPA, the U.S. Government, or any person or agency connected with

ISI Reprint Series This report is one in a series of reprints of articles and papers written by ISI research staff and published in professional journals and conference proceedings. For a complete list of ISI reports, write to

Document Distribution USC/Information Sciences Institute

4676 Admiralty Way Marina del Rey, CA 90292-6695 USA

I The Problem of Coherence

The example texts in this paper are generated by Penman, a systemic grammar-based generator with larger coverage than probably any other existing text generator. Penman was developed at ISI (see [Mann & Matthiessen 83], [Mann 831, [Matthiessen 84]). The input to Penman is produced by PEA (Programming Enhancement Advisor; see [Moore 87]), a program that inspects a user's LISP program and suggests enhancements. PEA is being developed to interact with the user in order to answer his or her questions about the suggested enhancements. Its theoretical focus is the production of explanations over extended interactions in ways that are superior to the simple goal-tree traversal of systems such as TYRESIAS QDavis 76]) and MYCIN QShortliffe 761).

In answer to the question how does the system enhance a program?, the following text (not generated by Penman) is not satisfactory:

(a). The system performs the enhancement. Before that, the system resolves conflicts. First, the system asks the user to tell it the characteristic of the program to be enhanced. The system applies transformations to the program. It confirms the enhancement with the user. It scans the program in order to End opportunities to apply transformations to the program.

because you have to work too hard to make sense of it. In contrast, using the same propo- sitions (now rearranged and linked with appropriate connectives), paragraph (b) (generated by Penman) is far easier to understand:

University of Southern California Page 1 Dec 31, 1988

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Planning Coherent Multisentential Text

(b). The system asks the user to tell it the characteristic of the program to be enhanced. Then the system applies transformations to the program. In par-ticular, the system scans the program in order to End opportunities to apply transformations to the program. Then the system resolves conflicts. It confirms...