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John Maxwell

John Maxwell is a Principal Engineer currently working on technologies for conversational agents.

He was the technical lead for PARC's XLE parser, which was one of the key enabling technologies used by Powerset for semantic search. Powerset, Inc. was acquired by Microsoft and became part of Bing. He also made significant contributions to the natural language technology that was licensed to Microlytics and to Inxight.

John joined PARC as an intern in 1978 as part of the Smalltalk group. He has a bachelor's and master's degree in computer science from MIT. His Master's thesis led to the first WYSIWYG music notation editor ("Mockingbird"), which appeared on the cover of Byte magazine in January 1984. John also helped develop the Cedar experimental programming environment before switching to computational linguistics.


PARC publications

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Prosodic phonology in LFG: a new proposal

LFG 09 Conference

13 July 2009


Speeding up LFG parsing using C-structure pruning

Coling 2008: Workshop on Grammar Engineering Across Frameworks

24 August 2008


Pruning the search space of a hand-crafted parsing system with a probabilistic parser

ACL2007 Workshop on Deep Linguistic Processing

28 June 2007


Efficient generation from packed input

Intelligent Linguistic Architectures, edited by M. Butt, M. Dalrymple and T. H. King.

15 December 2006

Grammatical machine translation

Human Language Technology Conference - North American Chapter of the Association for Computational Linguistics Annual Meeting (H

5 June 2006


On some pitfalls in automatic evaluation and significance testing for MT

ACL05 Workshop on Intrinsic and Extrinsic Evaluation Measures for MT and/or Summarization

28 June 2005


Exploiting F-structure input for sentence condensation

Proceedings of the LFG04 Conference

1 December 2004

Integrating finite-state technology with deep LFG grammars

Combining Shallow and Deep Processing for NLP/ESSLLI

9 August 2004

Speed and accuracy in shallow and deep stochastic parsing

Human Language Technology Conference/North American Chapter of the Association for Computational Linguistics Meeting

2 May 2004


Implementing restriction for Urdu complex predicates

Lexical-Functional Grammar Conference 2003

13 July 2003

Productive encoding of Urdu complex predicates in the ParGram project

Workshop on Computational Linguistics for South Asian Languages (EACL03)

14 April 2003


Adapting existing grammars: the XLE experience

19th International Conference on Computational Linguistics (COLING 2002)

31 August 2002

Parsing the Wall Street Journal using a Lexical-Functional Grammar and discriminative estimation techniques

Proceedings of the 40th Annual Meeting of the Association for Computational Linguistics

7 July 2002


Ambiguity management in grammar writing

Proceedings of the Workshop on Linguistic Theory and Grammar Implementation (ESSLLI-2000)

1 January 2000





The interface between phrasal and functional constraints

Computational Linguistics

1 December 1993

The LFG grammar writer's workbench

PARC technical report

1 November 1993


Training stochastic grammars from unlabelled text corpora

Practical Approaches to Scheduling and Planning: Papers from the AAAI Workshop; Technical Report WS-92-01

1 January 1992


A method for disjunctive constraint satisfaction

Current issues in parsing technology

31 December 1991

The hybrid nature of Lexical-Functional Grammar

AAAI Symposium on Principles of Hybrid Reasoning

1 November 1991


Modeling syntactic constraints on anaphoric binding

Proceedings of COLING 90

31 December 1990


An overview of disjunctive constraint satisfaction

Proceedings of the International Workshop on Parsing Technologies, Carnegie Mellon University

31 December 1989


An algorithm for functional uncertainty

Proceedings of the 12th International Conference on Computational Linguistics (COLING 88)

31 December 1988


Mockingbird: a composer's amanuensis

BYTE Magazine

1 January 1984


Mockingbird: a composer's amanuensis

PARC tech report

January 1983


Mockingbird, a musician's amanuensis [video]

watch video online

November 1981


Mockingbird: PARC Forum talk

PARC Forum talk

30 October 1980