DBpedia Release Evaluation: Difference between revisions

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The [http://dbpedia.hg.sourceforge.net/hgweb/dbpedia/dbpedia/raw-file/946fc9d51783/qualityAssessmentFramework/Kreis2011__Design_of_a_Quality_Assessment_Framework.pdf Quality Assessment Framework (QAF)] is developed to document the quality of the knowledge base and furthermore the progress of DBpedia's extraction framework. The main idea of this framework is a comparison between a manually created best-case dataset and the output from DBpedia's ontology based extraction. The QAF estimates the precision of the extraction framework and the completeness (recall) of DBpedia compared to its source Wikipedia.
The [http://dbpedia.hg.sourceforge.net/hgweb/dbpedia/dbpedia/raw-file/946fc9d51783/qualityAssessmentFramework/Kreis2011__Design_of_a_Quality_Assessment_Framework.pdf Quality Assessment Framework (QAF)] is developed to document the quality of the knowledge base and furthermore the progress of DBpedia's extraction framework. The main idea of this framework is a comparison between a manually created best-case dataset and the output from DBpedia's ontology based extraction. The QAF estimates the precision of the extraction framework and the completeness (recall) of DBpedia compared to its source Wikipedia.


== DBpedia Release Evaluation ==
== Evaluation Results ==
 
{| class="wikitable"
|+ Completeness (fixed mappings from 3.5.1)
|-
! Category
! DBpedia 3.5.1
! DBpedia 3.6
! DBpedia 3.7
|-
| Total
| 45,7%
| 60,2%
| 61,8%
|-
| Plain Property
| 80,5%
| 83,7%
| 86,0%
|-
| Number-Unit
| 68,6%
| 68,6%
| 66,7%
|-
| Coordinate
| 100,0%
| 100,0%
| 100,0%
|-
| Interval
| 72,7%
| 68,2%
| 72,7%
|-
| List
| 33,9%
| 75,7%
| 77,8%
|-
| One-Property-Table
| 5,4%
| 5,8%
| 5,8%
|-
| Multi-Poprty-Table
| 0,0%
| 0,0%
| 0,0%
|-
| Open Property
| 23,1%
| 23,1%
| 30,8%
|-
| Open Property Table
| na
| na
| na
|-
| Internal Template
| 8,6%
| 10,3%
| 10,3%
|-
| Merged Properties
| 57,1%
| 57,1%
| 71,4%
|}

Revision as of 14:05, 14 September 2011

DBpedia Release Evaluation

The Quality Assessment Framework (QAF) is developed to document the quality of the knowledge base and furthermore the progress of DBpedia's extraction framework. The main idea of this framework is a comparison between a manually created best-case dataset and the output from DBpedia's ontology based extraction. The QAF estimates the precision of the extraction framework and the completeness (recall) of DBpedia compared to its source Wikipedia.

Evaluation Results

Completeness (fixed mappings from 3.5.1)
Category DBpedia 3.5.1 DBpedia 3.6 DBpedia 3.7
Total 45,7% 60,2% 61,8%
Plain Property 80,5% 83,7% 86,0%
Number-Unit 68,6% 68,6% 66,7%
Coordinate 100,0% 100,0% 100,0%
Interval 72,7% 68,2% 72,7%
List 33,9% 75,7% 77,8%
One-Property-Table 5,4% 5,8% 5,8%
Multi-Poprty-Table 0,0% 0,0% 0,0%
Open Property 23,1% 23,1% 30,8%
Open Property Table na na na
Internal Template 8,6% 10,3% 10,3%
Merged Properties 57,1% 57,1% 71,4%
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