R. Korpal
ABSTRACT
This paper presents a comparative study of signature based indexing techniques applied to a database of temporal patterns. Temporal patterns include a set of states and relationships among the states. Signature-based indexing was used to accommodate multiple state values as well as the relationship among the states. The signature files can be implemented in different organizations and a specific implementation has its advantages and disadvantages. This study was undertaken to compare these implementations based on various criteria as listed in this paper. Specifically sequential signature files, bit-slice signature files, extendible signature hashing and signature trees were compared. The signature tree performed significantly better than Sequential and Bit-slice Signature files for content-based retrieval of temporal patterns, extendible signature hashing performed best of all the other implementations. However, the space overhead for Signature trees was significantly higher than all the other implementations.
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Index Terms
- A comparative study of signature based indexes for efficient retrieval of temporal patterns
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