1
Would an Explicit Versioning of the DDC Bring Advantages for Retrieval?
Claudia Effenberger, Julia Hauser
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
2
The DDC is constantly changing
726 Buildings for religious and related purpose726.7 Monastic buildings
726.79 Parts and accessory structures Including cells, cloisters, refectories
726.796 CloistersClass here comprehensive works on cloisters [formerly 726.69]
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
PICA 3
3000 Legler, Rolf4000 Mittelalterliche Kreuzgänge in Europa5400 [DDC22ger]726.79
3000 Legler, Rolf4000 Mittelalterliche Kreuzgänge in Europa5400 [DDC22ger]726.796
New subordinated class
It is not possible to review the correctness of DDC notations
3 | 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
4
The modifications can lead to incomplete search results
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
5
In spite of the modification thesearch result should be correct
!
?? ?
ddc=726.79* ?
? ?
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
6
We create identifiers for each version of the DDC classes and a Semantic Network for searching
Title
TitleTitle
skos:closeMatch[2010-06-16]
skos:broaderskos:narrower
dct:isReplacedBy
dc:subject
dc:subject
dc:subjectskos:broadMatch[2007-01-01] {2010-06-16}
dc:subject
dct:replaces
Title
Title
dc:subject
dc:subject
DDC class identifier DDC class identifier
DDC class identifier Subject Heading
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
7
Each version of a DDC class getsa unique identifier
http://dewey/info/class/726.796/2009/03/30/
726.796Cloisters
Class here comprehensive works on cloisters [formerly 726.69]
[2009-03-30]
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
8
Through the identifier we can differentiate between the versions
http://dewey/info/class/726.79/2005/11/02/
http://dewey/info/class/726.79/2009/03/30/
http://dewey/info/class/726.796/2009/03/30/
726.796Cloisters
Class here comprehensive works on cloisters [formerly 726.69]
[2009-03-30]
726.79Parts and accessory structures
Including cells, refectories[2009-03-30]
726.79Parts and accessory structures
Including cells, cloisters, refectories [2005-11-02]
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
9
Because of the versioning we can identify the meaning of a DDC class
Die singenden Steine von Moissac [2010-03]
Mittelalterliche Kreuzgänge in Europa [2008-02]
Infirmarien – Kranken- und Sterbehäuser der Mönche [2010-02]
http://dewey/info/class/726.79/2005/11/02/
http://dewey/info/class/726.79/2009/03/30/
http://dewey/info/class/726.796/2009/03/30/
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
10
We have to save the version of a DDC class in the descriptive entry
3010 Straub, Rainer4000 Die singenden Steine von Moissac5400 [DDC22ger]726.7960944755401 726.796[2009-03-30]
PICA 3
3010 Legler, Rolf4000 Mittelalterliche Kreuzgänge in Europa5400 [DDC22ger]726.795401 726.79[2005-11-02]{2009-03-30}
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
11
We model the relations as a Semantic Network
Infirmarien – Kranken- und Sterbehäuser der Mönche [2010-02]
Mittelalterliche Kreuzgänge in Europa [2008-02]Die singenden Steine von Moissac [2010-03]
skos:closeMatch[2010-06-16]
skos:broaderskos:narrower
dct:isReplacedBy
dc:subject
dc:subject
dc:subjectskos:broadMatch[2007-01-01] {2010-06-16}
dc:subject
dct:replaces
Kloster Wedinghausen – Westflügel [2008-03]
Der Kreuzgang der Abtei Altenryf
[2008-01]
dc:subject
dc:subject
726.79Parts and accessory structures
Including cells, refectories[2009-03-30]
726.79Parts and accessory structures
Including cells, cloisters, refectories [2005-11-02] {2009-03-30}
726.796Cloisters
Class here comprehensive works on cloisters [formerly 726.69]
[2009-03-30]
Cloister
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
Search without versioning and Semantic Network
12
??
ddc=726.796
Infirmarien – Kranken- und Sterbehäuser der Mönche [2010-02]
Mittelalterliche Kreuzgänge in Europa [2008-02]Die singenden Steine von Moissac [2010-03]
Kloster Wedinghausen – Westflügel [2008-03]
Der Kreuzgang der Abtei Altenryf
[2008-01]
726.79Parts and accessory structures
Including cells, (cloisters), refectories
726.796Cloisters
Class here comprehensive works on cloisters
[formerly 726.69]
Cloister
?
?
?
?
?
Die singenden Steine von Moissac [2010-03]
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
Search with versioning and Semantic Network
13
ddc=726.796
Infirmarien – Kranken- und Sterbehäuser der Mönche [2010-02]
Mittelalterliche Kreuzgänge in Europa [2008-02]Die singenden Steine von Moissac [2010-03]
skos:closeMatch[2010-06-16]
skos:broaderskos:narrower
dct:isReplacedBy
dc:subject
dc:subject
dc:subjectskos:broadMatch[2007-01-01] {2010-06-16}
dc:subject
dct:replaces
Kloster Wedinghausen – Westflügel [2008-03]
Der Kreuzgang der Abtei Altenryf
[2008-01]
dc:subject
dc:subject
726.79Parts and accessory structures
Including cells, refectories[2009-03-30]
726.79Parts and accessory structures
Including cells, cloisters, refectories [2005-11-02] {2009-03-30}
726.796Cloisters
Class here comprehensive works on cloisters [formerly 726.69]
[2009-03-30]
Cloister
!!
!! !
!
!Die singenden Steine von Moissac [2010-03]Mittelalterliche Kreuzgänge
in Europa [2008-02]
Der Kreuzgang der Abtei Altenryf
[2008-01]
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
There can be irrelevant documentsin the search results
14
? ??
ddc=726.796
Infirmarien – Kranken- und Sterbehäuser der Mönche [2010-02]
Mittelalterliche Kreuzgänge in Europa [2008-02]Die singenden Steine von Moissac [2010-03]
skos:closeMatch[2010-06-16]
skos:broaderskos:narrower
dct:isReplacedBy
dc:subject
dc:subject
dc:subjectskos:broadMatch[2007-01-01] {2010-06-16}
dc:subject
dct:replaces
Kloster Wedinghausen – Westflügel [2008-03]
Der Kreuzgang der Abtei Altenryf
[2008-01]
dc:subject
dc:subject
726.79Parts and accessory structures
Including cells, refectories[2009-03-30]
726.79Parts and accessory structures
Including cells, cloisters, refectories [2005-11-02] {2009-03-30}
726.796Cloisters
Class here comprehensive works on cloisters [formerly 726.69]
[2009-03-30]
Cloister
? ?
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
15
The modifications in the DDC can lead to incomplete search results
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
16
In spite of the modification thesearch result should be correct
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
17
Identifier and a Semantic Network for better search results
ddc=726.796
Infirmarien – Kranken- und Sterbehäuser der Mönche [2010-02]
Mittelalterliche Kreuzgänge in Europa [2008-02]Die singenden Steine von Moissac [2010-03]
skos:closeMatch[2010-06-16]
skos:broaderskos:narrower
dct:isReplacedBy
dc:subject
dc:subject
dc:subjectskos:broadMatch[2007-01-01] {2010-06-16}
dc:subject
dct:replaces
Kloster Wedinghausen – Westflügel [2008-03]
Der Kreuzgang der Abtei Altenryf
[2008-01]
dc:subject
dc:subject
726.79Parts and accessory structures
Including cells, refectories[2009-03-30]
726.79Parts and accessory structures
Including cells, cloisters, refectories [2005-11-02] {2009-03-30}
726.796Cloisters
Class here comprehensive works on cloisters [formerly 726.69]
[2009-03-30]
Cloister
Die singenden Steine von Moissac [2010-03]Mittelalterliche Kreuzgänge
in Europa [2008-02]
Der Kreuzgang der Abtei Altenryf
[2008-01]
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
18
Thank you for your attention!
| 18 | Concepts in Context | Versioning of the DDC | July 19, 2010
