Description

ABSTRACT

                   To manage the data, currently based on ontology technique. To extern the existing

definition of modules. To used to checking safely both schema and data reference easily. To

describe the logic underlie modern ontology language like RDFS, OWL, OWL2.To efficiently

manage the large data base. In this paper, we extend the existing definitions of modules and we

introduce novel properties of robustness that provide means for checking easily that a robust

module-based DMS evolves safely both the schema and the data of the reference DMS. the piece

of schema relevant to our application needs, possibly to personalize it with extra constraints our

application under construction, and then to manage our own data set using the resulting schema.

different solutions to achieve such a reuse of a reference ontology-based DMS. Indeed, modern

ontological languages—like the W3C recommendations RDFS, OWL, andOWL2—are actually

XML-based syntactic variants of well known DLs.