1. LLOD Use Case: Syntactic Search Jan Odijk CLARIAH-CORE LD4LR Workshop Utrecht, 2017-02-06/07

2. Search in Token-annotated Corpora Search in Treebanks
Overview
Search in Token-annotated Corpora
Search in Treebanks

3. Search in Token-annotated Corpora Search in Treebanks
Overview
Search in Token-annotated Corpora
Search in Treebanks

4. Corpus Search Token-Annotated SONAR (535 m tokens, Dutch) Pos-tagged
Encoded in FoLiA
Search
OpenSONAR
4 search interfaces, of increasing complexity
Expert: CQP queries

5. Other Corpora Search- all use CQP. Token-Annotated Own Corpora BNC
Contemporary Dutch Corpus
Search- all use CQP.
AutoSearch
BNC Lancaster
Contemporary Dutch Corpus

6. LOD? Token-Annotated Will it bring advantages? If so, which ones?
Does it retain the power and simple notation of CQP?
SPARQL queries?
REs over token descriptions?

7. Search in Token-annotated Corpora Search in Treebanks
Overview
Search in Token-annotated Corpora
Search in Treebanks

8. Treebanks
Treebank = text corpus in which each sentence has been assigned a syntactic structure
I use
CGN, LASSY, CHILDES for Dutch
LINDAT/CLARIN for many different languages
Tündra for (mainly) German
INESS treebanks for multiple languages
Query languages:
CGN, LASSY, CHILDES: XPATH/XQUERY
LINDAT/CLARIN: PML-TQ
Tündra: Tiger
INESS: Tiger

9. Treebanks Dedicated search applications: GrETEL PaQU Performance:
Example-based search & XPATH
PaQU
Dedicated search for dependencies & XPATH
Performance:
OK for 65k sent /1 M token corpora
Too slow for 7 M sent corpora
(and getting slower every 18 months)

10. Treebanks
LOD:
Could it be used to overcome the many different query languages in use?
Query language? Same potential, transparent notation?
Query language syntax NO problem
Queries get very complex very quickly
Must know the structure of the syntactic structures in every fine detail

11. Treebanks
LOD:
Linking to other resources. Combined syntactic/morphological/semantic search
Wordnet for checking for semantic properties (mass/count, human/nonhuman)
CELEX for morphological/phonological properties
performance?

12. Thanks for your attention