Temporal Bi-Index

Currently, it is important to store the whole evolution of the object states by referencing the validity time frame. Temporal databases are inseparable parts of intelligent information systems. Temporal spheres are mostly referring validity expressed by the start and end timepoints. To ensure performance, database indexes are created by sorting the validity of the states for each object. However, to monitor the evolution in industry monthly, daily, weekly, or annually, the standard conventional index is not suitable. In this paper, temporal architectures are summarized, pointing to the temporal spheres. It mostly emphasizes indexing, focusing on the proposed bi-index combining bitmap and B+tree structure to the common index. Thanks to that, evolution monitoring for the specified time range can be significantly improved.