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Table 1 Change operations and change cost model

From: Region Evolution eXplorer – A tool for discovering evolution trends in ontology regions

 

Change operation

Description

Change costs

Attributes

addC

Addition of a new concept

1

 

delC

Deletion of a concept

2

Relationships

addR

Addition of a new relationship

0.5/0.5

 

delR

Deletion of a relationship

1.0/1.0

Concepts

addA

Addition of a new attribute

0.5

 

delA

Deletion of an attribute

0.5

 

chgAttValue

Modification/change of an attribute value

0.5

  1. The table shows which change operations and corresponding change costs we utilize in REX. For relationships we split the costs and assign them to the source and target concept, respectively.