One of the important points of designign an OODBMS is to have a good acces to stored data. Up to present, several indexing schemes have been developed for this purpose. However, they are seperately focused on aggregation hierarchy or inheritance hiera...
One of the important points of designign an OODBMS is to have a good acces to stored data. Up to present, several indexing schemes have been developed for this purpose. However, they are seperately focused on aggregation hierarchy or inheritance hierarchy of object-oriented data model. This paper preposes a multiring indexing technique accessing both aggregation and inheritance hierarchies, which effectively evaluates queries. This paper varioulsy compares the usefulness of the proposed scheme with some existing schemse. The results of simulagtions in this study indicate the improved performance in terms of storage and retrival costs.