1. April 26, 2007Workshop on Treebanking, NAACL-HTL 2007 Rochester1 Treebanks: Language-specific Issues Czech Jan Hajič Institute of Formal and Applied Linguistics School of Computer Science Faculty of Mathematics and Physics Charles University, Prague Czech Republic

2. April 26, 2007Workshop on Treebanking, NAACL-HTL 2007 Rochester2 Czech I Morphology (& tagging) 300.000 dictionary entries ~ 20 mil. forms Rich, 13 categories to deal with Tagset: ~4500 plausible tags, 3000 observed Lemmatization essential Syntax (surface) “Free” word order – non-projective constructions Frequent occurrence of… Agreement (several types) “Governance” (subcategoriaztion) and Control

3. April 26, 2007Workshop on Treebanking, NAACL-HTL 2007 Rochester3 Czech II Deep syntax and semantics Information structure Topic, focus – each word (node) vs. global “Deep” word order ~ communicative function Valency, word sense Function and form strongly corelated  Checking, constraints Style Colloquial / standard Hard to locate to layers…

4. April 26, 2007Workshop on Treebanking, NAACL-HTL 2007 Rochester4 Examples English (motivation) John expects Mary to leave.

5. April 26, 2007Workshop on Treebanking, NAACL-HTL 2007 Rochester5 Example (~ he wanted her to leave) Surface syntax: Nutil ji odejít / Začal ji číst

6. April 26, 2007Workshop on Treebanking, NAACL-HTL 2007 Rochester6 Example (~ he wanted her to leave) Deep syntax: Nutil ji odejít / Začal ji číst link to surface tree node