Difference between revisions of "Twol rules in lttoolbox"
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Techievena (talk | contribs) (Add type of rules) |
Techievena (talk | contribs) (alternate archiphoneme or sets) |
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==Guidelines== |
==Guidelines== |
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| − | *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 kind of ambiguities. |
*The xml tags must be well defined for archiphonemes and rules and must be distinct from the other existing tags in lttoolbox. |
*The xml tags must be well defined for archiphonemes and rules and must be distinct from the other existing tags in lttoolbox. |
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*Every rule entry should have comments adequate enough to give a brief understanding of morphophonological transformations performed by the twol compiler. |
*Every rule entry should have comments adequate enough to give a brief understanding of morphophonological transformations performed by the twol compiler. |
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**Morphologically conditioned insertion |
**Morphologically conditioned insertion |
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| − | == |
+ | ==Alphabets== |
<pre> |
<pre> |
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| + | <alphabet>аӑеёӗиоуӳыэюябвгджзклмнпрсҫтфхцчшщйьъАӐЕЁӖИОУӲЫЭЮЯБВГДЖЗКЛМНПРСҪТФХЦЧШЩЙЬЪ<ar n="A">ae</ar></alphabet> |
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| − | <archiphoneme> |
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| − | <ar n="A" alpha="ae"/> |
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| − | <ar n="B" alpha="bcd"/> |
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| − | </archiphoneme> |
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</pre> |
</pre> |
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| '''ar''' || archiphoneme |
| '''ar''' || archiphoneme |
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| − | | ''' |
+ | | '''n''' || archiphoneme name |
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<pre> |
<pre> |
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<sets> |
<sets> |
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| − | <set n="Vowels" |
+ | <set n="Vowels">aeiou</set> |
| − | <set n="BackVow" |
+ | <set n="BackVow">bcdfg</set> |
</sets> |
</sets> |
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</pre> |
</pre> |
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| '''n''' || set name |
| '''n''' || set name |
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| − | | '''alpha''' || alphabet |
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| − | |- |
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Revision as of 17:25, 21 May 2018
Contents |
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 kind of 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 entry should have comments adequate enough to give a brief understanding of morphophonological transformations performed by the twol compiler.
Design
- The design is still in the development stage and may need significant modifications after it is implemented on the existing language pairs.
- The design must be robust enough to support all type of rules namely:
- Phonologically conditioned deletion
- Morphologically conditioned deletion
- Phonologically conditioned symbol change
- Morphologically conditioned symbol change
- Phonologically conditioned insertion
- Morphologically conditioned insertion
Alphabets
<alphabet>аӑеёӗиоуӳыэюябвгджзклмнпрсҫтфхцчшщйьъАӐЕЁӖИОУӲЫЭЮЯБВГДЖЗКЛМНПРСҪТФХЦЧШЩЙЬЪ<ar n="A">ae</ar></alphabet>
| Tag/Symbol | Meaning |
|---|---|
| ar | archiphoneme |
| n | archiphoneme name |
Sets
<sets> <set n="Vowels">aeiou</set> <set n="BackVow">bcdfg</set> </sets>
| Tag/Symbol | Meaning |
|---|---|
| set | set/group of alphabets |
| n | set name |
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="ne"><l_c><set n="BackVow"></l_c><r_c></r_c></context>
</rule>
</rules>
| Tag/Symbol | Meaning |
|---|---|
| rule | twol rule |
| c | comment |
| m | morphotactic side |
| s | surface side |
| context | context for transformation |
| constraint | direction constraint |
| f | a:b => _ ; If the symbol pair a:b appears it must be in context _ |
| b | a:b <= _ ; If lexical a appears in the context _ then it must correspond to surface b |
| e | a:b <=> _ ; Lexical a always corresponds to b in context _ |
| ne | a:b /<= _ ; Lexical a never corresponds to b in context _ |
| r_c | right context |
| l_c | left context |
