Reference scheme reduction on subtypes in ORM
Object-Role Modeling (ORM) allows composite reference schemes for object types to be portrayed using either objectification (in the sense of situational nominalization) or coreference (as defined in ORM rather than linguistics). In practical modeling, cases can arise where a subtype of a compositely...
| Main Authors: | , |
|---|---|
| Format: | Teaching Resource |
| Published: |
Springer Berlin Heidelberg
2013
|
| Subjects: | |
| Online Access: | http://eprints.intimal.edu.my/82/ |
| _version_ | 1848766393778962432 |
|---|---|
| author | Carver, Andy Halpin, Terry |
| author_facet | Carver, Andy Halpin, Terry |
| author_sort | Carver, Andy |
| building | INTI Institutional Repository |
| collection | Online Access |
| description | Object-Role Modeling (ORM) allows composite reference schemes for object types to be portrayed using either objectification (in the sense of situational nominalization) or coreference (as defined in ORM rather than linguistics). In practical modeling, cases can arise where a subtype of a compositely identified object type has a natural reference scheme that utilizes only some components of the supertype’s reference scheme. Using the supertype’s reference scheme to verbalize facts for the subtype then leads to redundancy or other irrelevance in the verbalization. Moreover, if such cases are input directly to the ORM’s standard relational mapping procedure (Rmap), this can lead to table schemes that are not fully normalized. The paper identifies ways in which such problems can arise, and proposes ways to avoid these problems, partly by extending earlier work on reference scheme reduction, role redirection, and disjunctive reference, illustrating the approach with some practical examples. |
| first_indexed | 2025-11-14T11:50:26Z |
| format | Teaching Resource |
| id | intimal-82 |
| institution | INTI International University |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:50:26Z |
| publishDate | 2013 |
| publisher | Springer Berlin Heidelberg |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | intimal-822016-10-07T06:34:57Z http://eprints.intimal.edu.my/82/ Reference scheme reduction on subtypes in ORM Carver, Andy Halpin, Terry Q Science (General) QA75 Electronic computers. Computer science Object-Role Modeling (ORM) allows composite reference schemes for object types to be portrayed using either objectification (in the sense of situational nominalization) or coreference (as defined in ORM rather than linguistics). In practical modeling, cases can arise where a subtype of a compositely identified object type has a natural reference scheme that utilizes only some components of the supertype’s reference scheme. Using the supertype’s reference scheme to verbalize facts for the subtype then leads to redundancy or other irrelevance in the verbalization. Moreover, if such cases are input directly to the ORM’s standard relational mapping procedure (Rmap), this can lead to table schemes that are not fully normalized. The paper identifies ways in which such problems can arise, and proposes ways to avoid these problems, partly by extending earlier work on reference scheme reduction, role redirection, and disjunctive reference, illustrating the approach with some practical examples. Springer Berlin Heidelberg 2013 Teaching Resource NonPeerReviewed Carver, Andy and Halpin, Terry (2013) Reference scheme reduction on subtypes in ORM. [Teaching Resource] http://link.springer.com/chapter/10.1007/978-3-642-41033-8_59 |
| spellingShingle | Q Science (General) QA75 Electronic computers. Computer science Carver, Andy Halpin, Terry Reference scheme reduction on subtypes in ORM |
| title | Reference scheme reduction on subtypes in ORM |
| title_full | Reference scheme reduction on subtypes in ORM |
| title_fullStr | Reference scheme reduction on subtypes in ORM |
| title_full_unstemmed | Reference scheme reduction on subtypes in ORM |
| title_short | Reference scheme reduction on subtypes in ORM |
| title_sort | reference scheme reduction on subtypes in orm |
| topic | Q Science (General) QA75 Electronic computers. Computer science |
| url | http://eprints.intimal.edu.my/82/ http://eprints.intimal.edu.my/82/ |