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Introduction Demo Grammar References. XLE Tutorial & Demo. Kakia Chatsiou Department of Language and Linguistics University of Essex achats@essex.ac.uk. LG517. Introduction to LFG. 1. Introduction Demo Grammar References. Outline. Introduction What’s XLE? The basic Grammar file

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slide1

Introduction

Demo Grammar

References

XLE Tutorial & Demo

Kakia Chatsiou

Department of Language and Linguistics

University of Essex

achats@essex.ac.uk

LG517. Introduction to LFG

1

slide2

Introduction

Demo Grammar

References

Outline

  • Introduction
    • What’s XLE?
    • The basic Grammar file
    • Examining a rule
    • Examining a lexical entry
  • Demo Grammar
    • Assumptions
    • Coverage
    • Demonstration
  • References

Aikaterini K. Chatsiou

2

slide3

Introduction

Demo Grammar

References

Outline

  • Introduction
    • What’s XLE?
    • The basic Grammar file
    • Examining a rule
    • Examining a lexical entry
  • Demo Grammar
    • Assumptions
    • Coverage
    • Demonstration
  • References

Aikaterini K. Chatsiou

3

slide4

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • What’s XLE?
    • Xerox Linguistics Environment
    • A computational environment developed to facilitate the writing and debugging of Lexical Functional Grammars
    • C-structure, f-structure, s-structure, and further projections can be defined
    • Includes other activities related to grammar development: analysing performance, test suites, generation, treebanks and other.

Aikaterini K. Chatsiou

4

slide5

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

Aikaterini K. Chatsiou

5

slide6

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

Grammar

Version ID

Aikaterini K. Chatsiou

6

slide7

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

Language

ID

Aikaterini K. Chatsiou

7

slide8

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

Component

ID

Aikaterini K. Chatsiou

8

slide9

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

XLE version

Number

Aikaterini K. Chatsiou

9

slide10

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

4 dashes

signal the

end of each

section / file

Aikaterini K. Chatsiou

10

slide11

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

here it is

S(entence)

The default

category

when parsing

Aikaterini K. Chatsiou

11

slide12

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

here no files

are included

the list of

files to be

included,

ending in

.lfg

Aikaterini K. Chatsiou

12

slide13

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

here

precedence

is given to

the grammar

with version

ID TOY and

language ID

Ellinika

specification

of which

lexical entries,

rules and

templates

are given

precedence

Aikaterini K. Chatsiou

13

slide14

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

list of the

grammatical

relations which

must be

subcategorised

for in order to

appear in the

argument list of

of the PRED

Aikaterini K. Chatsiou

14

slide15

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

list of

attributes whose

values

must contain a

PRED

Aikaterini K. Chatsiou

15

slide16

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

list of

attributes

which do not

distribute

when

coordinated

Aikaterini K. Chatsiou

16

slide17

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

the category

which is covert

in the

c-structure

(empty string)

Aikaterini K. Chatsiou

17

slide18

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • The basic grammar file.

The ranking

of optimality

constraints

Aikaterini K. Chatsiou

18

slide19

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • Examining a rule

Category

Aikaterini K. Chatsiou

19

slide20

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • Examining a rule

Category

Schema

Aikaterini K. Chatsiou

20

slide21

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • Examining a rule

Defining

equality

Aikaterini K. Chatsiou

21

slide22

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • Examining a rule

Defining

equality

Disjunction

Aikaterini K. Chatsiou

22

slide23

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • Examining a rule

Aikaterini K. Chatsiou

23

slide24

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • Examining a rule

Aikaterini K. Chatsiou

24

slide25

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • Examining a rule

Shuffle operator

Aikaterini K. Chatsiou

25

slide26

Introduction

Demo Grammar

References

What’s XLE?

The basic grammar file

Examining a rule

Examining a lexical entry

Introduction

  • Examining a rule

Shuffle operator

Comment

Aikaterini K. Chatsiou

26

slide27

Introduction

Demo Grammar

References

What is XLE?

The basic Grammar file

Examining a rule

Examining a lexical entry

Introduction

  • Examining a lexical entry

grammatical

category

Aikaterini K. Chatsiou

27

slide28

Introduction

Demo Grammar

References

What is XLE?

The basic Grammar file

Examining a rule

Examining a lexical entry

Introduction

  • Examining a lexical entry

Morphological

marker

Aikaterini K. Chatsiou

28

slide29

Introduction

Demo Grammar

References

What is XLE?

The basic Grammar file

Examining a rule

Examining a lexical entry

Introduction

  • Examining a lexical entry

Template

(shortcuts)

Aikaterini K. Chatsiou

29

slide30

Introduction

Demo Grammar

References

Assumptions

Coverage

Demonstration

Demo Grammar

  • toy-gre7.lfg
    • Assumptions
    • Coverage
    • Demonstration

Aikaterini K. Chatsiou

30

slide31

Introduction

Demo Grammar

References

Assumptions

Coverage

Demonstration

Demo Grammar

  • Assumptions
    • All four possible Modern Greek word orders (VSO, SVO, OSV and OVS) are equally acceptable and grammatical
    • Modern Greek Word order is represented non-configurationally (Tzanidaki, 1996; Alexopoulou, 1999 among others) :
    • No morphology. For each word there is a separate lexical entry for each case, gender and number.

Aikaterini K. Chatsiou

31

slide32

Introduction

Demo Grammar

References

Assumptions

Coverage

Demonstration

Demo Grammar

  • Coverage
    • All 4 word orders (ex.1-4)
    • Pro-drop character of the language (empty string node e as a disjunction in the subject NP c-structure node) (ex.5-6)
    • Subcategorization frames of intransitive, transitive and ditransitive verbs (including the realisation of the OBL object of ditransitive verbs either through an NP in GEN or a PP[se](ex 7-10), successfully ruling out sentences like (11)
    • successful assignment of the appropriate grammatical functions to constituents according to their case (NOMSUBJ, ACCOBJ, GENOBL) (ex.12) ruling out ex.13
    • number, case and gender assignment among the constituents of an NP or a PP (ex.14-17)

Aikaterini K. Chatsiou

32

slide33

Introduction

Demo Grammar

References

Assumptions

Coverage

Demonstration

Demo Grammar

Demonstration

Aikaterini K. Chatsiou

33

slide34

Introduction

Demo Grammar

References

References

  • XLE walkthrough.

http://www2.parc.com/istl/groups/nltt/xle/doc/walkthrough.html

  • Tzanidaki, Dimitra Irini. 1996. ”Configurationality and Greek Clause structure”. UCL Working Papers in Linguistics.
  • Alexopoulou, Theodora. 1999. The syntax of Discourse functions in Greek; a non configurational approach. PhD thesis, University of Edinburg.

Aikaterini K. Chatsiou

34