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Towards a Morphological Analyzer for Old Norse. Morpholog. Analyzer - CHLT 20032 Introduction Goal: a computer program that analyzes morphological structure.

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Presentation on theme: "Towards a Morphological Analyzer for Old Norse. Morpholog. Analyzer - CHLT 20032 Introduction Goal: a computer program that analyzes morphological structure."— Presentation transcript:

1 Towards a Morphological Analyzer for Old Norse

2 Morpholog. Analyzer - CHLT Introduction Goal: a computer program that analyzes morphological structure of Old Norse words and generates declension tables Two analyzers A1, A2; both output all possible declension paradigms for inputted word A1: input headwords from a dictionary database or manual input A2: input inflected words from saga texts [Show sample query A1 without details]

3 Morpholog. Analyzer - CHLT Broader Context (1) Input (mss) Marked-up transcript Normalized text Analyzer Output (declension tables)

4 Morpholog. Analyzer - CHLT Broader Context (2) CLHT Project Scandinavian Section, UCLA (Prof. Timothy Tangherlini) –Developing Old Norse morphological analyzer Det Arnamagnæanske Institut, Københavns Universitet (Matthew Driscoll) –XML markup of Old Norse texts

5 Morpholog. Analyzer - CHLT Computational Environment Written in Perl Database: MySQL Server: Apache Running on Linux machine –http://ecampusdev.humnet.ucla.edu/curban

6 Morpholog. Analyzer - CHLT Linguistic Environment Zoega’s Dictionary of Old Norse - Icelandic augmented with additional headwords from the Old Norse dictionary project, Ordbog over det norrøne prosasprog(ONP) at Københavns Universitet Fornrit normalization Verification of performance: comparison with forms in Bower (1994), Gordon (1956) Focus on non-poetic lexicon

7 Morpholog. Analyzer - CHLT Analyzer Structure (General) MySQL database In: (head)word Analyzer Find root Find endings Apply sound changes Out: declension(s)

8 Morpholog. Analyzer - CHLT Analyzer Structure (Database) Tables exist for: –adjectives (regular endings, exceptions) –articles (free, suffixed) –dictionary –nouns (regular endings, exceptions) –possessive pronouns –verbs (regular endings, exceptions, anomalous, strong_ablaut)

9 Morpholog. Analyzer - CHLT A1 Structure (Specific 1) Input: Head word Declension information Part of speech Translation

10 Morpholog. Analyzer - CHLT A1 Structure (Specific 2-1) A1 pseudocode (nouns): Translate declension info into MySQL format Extract most likely endings from words in declension info Determine root of head word Create MySQL statement

11 Morpholog. Analyzer - CHLT A1 Structure (Specific 2-2) Receive all declension paradigms that fit declension information Apply regular sound changes Replace exceptional forms Output results [Show sample queries with details]

12 Morpholog. Analyzer - CHLT Outlook (1): Accomplishments Zoega in electronic, parsable format Show sample of complex Zoega entry] A1 outputs paradigms for all parts of speech in Zoega

13 Morpholog. Analyzer - CHLT Outlook (2): A1 Performance n (112)v (110)a (25) Correct92.8 % Exceptions Incorrect Form dispute

14 Morpholog. Analyzer - CHLT Outlook (3): Next Steps Improve A1 performance: general, compound words, etc. Expand databases of exceptions Improve verification method Implement A2 beyond experimental stage Connect analyzers to XML-tagged text


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