Difference between revisions of "Twol rules in lttoolbox"

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(Add rule syntax)
(Add tag meanings)
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==Guidelines==
 
==Guidelines==
 
*Every rule in the dictionary file must be properly compatible with the the HFST twolc engine and must not result in any ambiguities.
 
*Every rule in the dictionary file must be properly compatible with the the HFST twolc engine and must not result in any ambiguities.
*The xml tags must be well defined for archiphonemes and rules.
+
*The xml tags must be well defined for archiphonemes and rules and must be distinct from the other existing tags in lttoolbox.
 
*Every rule should have a comment giving the input from the morphotactics no exceptions
 
*Every rule should have a comment giving the input from the morphotactics no exceptions
   
 
==Design==
 
==Design==
  +
  +
{|class=wikitable
  +
! Tag/Symbol !! Meaning
  +
|-
  +
| '''ar''' || archiphoneme
  +
|-
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| '''alpha''' || alphabet
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|-
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| '''set''' || set
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|-
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| '''m''' || morphotactic side
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|-
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| '''s''' || surface side
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|-
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| '''l_c''' || left context
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|-
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| '''r_c''' || right context
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|-
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|}
   
 
==Archiphonemes==
 
==Archiphonemes==

Revision as of 06:09, 20 May 2018

Current Status: In Progress
Project: Extend lttoolbox to have the power of HFST

Guidelines

  • Every rule in the dictionary file must be properly compatible with the the HFST twolc engine and must not result in any ambiguities.
  • The xml tags must be well defined for archiphonemes and rules and must be distinct from the other existing tags in lttoolbox.
  • Every rule should have a comment giving the input from the morphotactics no exceptions

Design

Tag/Symbol Meaning
ar archiphoneme
alpha alphabet
set set
m morphotactic side
s surface side
l_c left context
r_c right context

Archiphonemes

<archiphoneme>
  <ar n="A" alpha="ae"/>
  <ar n="B" alpha="bcd"/>
</archiphoneme>

Sets

<sets>
  <set n="Vowels" alpha="aeiou"/>
  <set n="BackVow" alpha="bcdfg"/>
</sets>

Twol Rules

<rules>
  <rule c="Back vowel harmony for archiphoneme A">
    <m><ar n="A"></m><s>a</s>
    <context constraint="e"><l_c><set n="BackVow"></l_c><r_c></r_c></context>
  </rule>
  <rule c="Only hyphen in vowel boundaries and caps">
    <m><ar n="hyph?"></m><s>-</s>
    <context constraint="f"><l_c><set n="Vowels"></l_c><r_c></r_c></context>
  </rule>
  <rule c="Back vowel harmony for archiphoneme A">
    <m><ar n="A"></m><s>a</s>
    <context constraint="b"><l_c><set n="BackVow"></l_c><r_c></r_c></context>
  </rule>
  <rule c="Back vowel harmony for archiphoneme A">
    <m><ar n="A"></m><s>a</s>
    <context constraint="n"><l_c><set n="BackVow"></l_c><r_c></r_c></context>
  </rule>
</rules>