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Home > Documents > Lexicon and Lexical Rules in HPSG Evgenia Ivanova [email protected] February 7, 2007.

Lexicon and Lexical Rules in HPSG Evgenia Ivanova [email protected] February 7, 2007.

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Lexicon and Lexical Rules in HPSG Evgenia Ivanova [email protected] February 7, 2007
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Page 1: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Lexicon and Lexical Rules in HPSG

Evgenia [email protected]

February 7, 2007

Page 2: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Outline

2 types of lexical generalizations Basic Lexicon and its status Extending the Lexicon

with MLR

with DLR Open Questions References

Page 3: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Lexical Generalizations

Horizontal Generalizations

Vertical Generalizations

Page 4: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Horizontal Generalizations

Lexical rules

If there is a grammatical word described by D then the corresponding words E’ are also grammatical

Page 5: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Horizontal Generalizations

Page 6: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Lexical Generalizations

Horizontal Generalizations

Vertical Generalizations

Page 7: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Vertical Generalizations

Lexical principles

If a word is described by D, then it is also described by E

Page 8: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Vertical Generalizations

Complex vs type antecedents

Page 9: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Vertical Generalizations

Complex vs type antecedents

Page 10: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Vertical Generalizations

Complex vs type antecedents

Page 11: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Vertical Generalizations

Complex vs type antecedents

Page 12: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Outline

2 types of lexical generalizations Basic Lexicon and its status Extending the Lexicon

with MLR

with DLR Open Questions References

Page 13: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Basic Lexicon

Lexicon external to the theory

Lexicon internal to the theory

Page 14: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Basic Lexicon - Lexicon external to the theory

Extra set of descriptions of word objects

G = <Σ, Θ, L>

Page 15: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Basic Lexicon - Lexicon internal to the theory

Ordinary implicational constraint on word objects

Word Principle

word D1 V D2 V…V Dn

Page 16: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Outline

2 types of lexical generalizations Basic Lexicon and its status Extending the Lexicon

with MLR

with DLR Open Questions References

Page 17: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Extending the Lexicon

MLR – Meta-Level Lexical Rules (lexical entries)

DLR – Description-Level Level Rules (word objects)

Page 18: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Extending the Lexicon with MLR

R = {r1,…rn} (binary relations)

B = {β1… β n} (base lexical entries)

L: (full set of lexical entries)

B<L

for all λ in L and r in R such that r(λ,φ) in L

Page 19: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Extending the Lexicon with DLR

Binary relations between word objects

Integration of lexical rules at the same level as the other grammatical constraints

Page 20: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Extending the Lexicon with DLR

Change the Signature

Page 21: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Extending the Lexicon with DLR

Page 22: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Extending the Lexicon with DLR

Page 23: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Outline

2 types of lexical generalizations Basic Lexicon and its status Extending the Lexicon

with MLR

with DLR Open Questions References

Page 24: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

Open Questions

Distinguishing between lexical and structural information

Status of the input of the lexical rule

“Phantom” lexical entries

Page 25: Lexicon and Lexical Rules in HPSG Evgenia Ivanova eivanova@sfs.uni-tuebingen.de February 7, 2007.

References

[Meurers, 2000] Lexical Generalizations in the Syntax of German Non-Finite Constructions.Phil. Dissertation, Eberhard-Karls-Universität Tübingen [p.103-135]


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