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| IST Project Number | FP6 – 507483 | Acronym | DIP |
| Full Title | Data, Information, and Process Integration with Semantic Web Services | ||
| Project URL | http://dip.semanticweb.org | ||
| Document URL | here: latest version | ||
| EU Project Officer | Kai Tullius | ||
| Deliverable Number | 2.5 | Title | Flexible Ontological Repository (FOR) |
| Work package Number | 2 | Title | Ontology Management |
| Date of Delivery | contractual | M30 | actual | 30-June-2006 |
| Status | version | 0.3 | final | |
| Nature | ||||
| Dissemination Level | ||||
| Abstract (for dissemination) |
This document contains a summary covering the ontology repository implementation provided by Unicorn, that can be used in conjunction with the Ontology Representation and Data Integration (ORDI) Framework. |
| Keywords | Ontology repository |
| Version Log | |||
| issue date (dd-mm-yy) | revision no. | author | change |
| 31-12-05 | 001 | Erel Sharf | first internal version (version 1.0) |
| 09-06-06 | 002 | Erel Sharf | final version for internal review |
| 30-06-06 | 003 | Erel Sharf | final submitted version (version 3.0) |
| Reviewer Information | |||||||||
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The ontology repository is backed by a flexible Relational Database (RDB) which implements ORDI API [1] (the DIP repository API).
FOR is a flexible and scalable repository. The flexibility of the repository is achieved by implementing a generic schema that stores any meta-modeled object. This means that the repository can store any entity with any structure, and this is done by internally defining a meta-model ontology. For example by meta modelling WSML ontology, the repository is able to store and retrieve WSML ontology In addition, the Hibernate ORM tool is used to streamline application development, and to create an abstraction layer between the application logic and the actual RDB vendor so that the actual backing RDB may be easily replaced.
The implementation of the ORDI repository API is an additional layer based on the core repository as illustrated in the diagram below. The basic functionalities defined by the API are:
FOR is configured to store WSMO [3] ontologies and
OMWG [4] mapping documents.
Nature: Java library
Interfaces (API, Web Services): a Java API
Platform: JDK 1.4
Supported standards: WSMO, ORDI
Required Libraries ( OMWG, SDK Cluster, WSMO-related):
Required Libraries (others):
Install an RDBMS, FOR will be backed by an RDBMS. A default free lightweight RDBMS is MSDE (Microsoft SQLServer Desktop Engine). MSDE may be downloaded from Unicorn FTP site: ftp://unicorn.com User: dipftp, Pass: 796diP.
MSDE DB server installation:
A message reading: “The instance name specified is invalid” may appear at the end of the MSDE installation, please ignore the message.
After downloading the “for.zip” file, extract the files. The following files structure is expected:
The DemoOrdiRepositoryTest.java file is a unit test that demonstrates how client code can interoperate with the repository via ORDI API.
The runTest batch file runs the DemoOrdiRepositoryTest.
The setUnicornRepositoryPath batch file sets the required libs in to the classpath for convenience.
FOR is design to be a multi DB vendor repository. currently it is tested with MS SQL Server, Oracle and IBM DB2.
FOR is pre-configured to work with a local MSDE or SQL Server listening on port 1433 for convenience.
This configuration can be easily adjusted in the "connect-micro-model.xml" file under "conf" directory.
In addition, a sample configuration file for Oracle - "connect-micro-model_for_Oracle.xml",
and for DB2 - "connect-micro-model_for_DB2.xml" can be also found under "conf" directory.
Can be found in DemoOrdiRepositoryTest.java.
Due to the flexibility and the generic nature of the repository engine, there are inherited performance challenges that need to be addressed.
[1] A. Kiryakov, D. Ognyanov, and V. Kirov: A Framework for Representing Ontologies Consisting of Several Thousand Concepts Definitions. DIP Project Deliverable D2.2, June 2004. http://www.ontotext.com/ordi/v0.4/FactSheet.html
[2] J. de Bruijn, H. Lausen , R. Krummenacher, A. Polleres, L. Predoiu, M. Kifer, D Fensel: The Web Service Modeling Language WSML. Deliverable d16.1v0.2, WSML, 2005. http://www.wsmo.org/TR/d16/d16.1/v0.2/
[3] D. Roman, H. Lausen, U. Keller (eds); J. de Bruijn, Ch. Bussler, J. Domingue, D. Fensel, M. Hepp, M. Kifer, B. Konig-Ries, J. Kopecky, R. Lara, E. Oren, A. Polleres, J. Scicluna, M. Stollberg: Web Service Modeling Ontology (WSMO). Deliverable d2v1.2, WSMO, 2005. http://www.wsmo.org/TR/d2/v1.2/
[4] Scharffe, François and de Bruijn, Jos. A Language to Specify Mappings between Ontologies. In IEEE SITIS'05, Yaoundé, Cameroon, November 27th - December 1st, 2005.