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QuoteRef: copeG3_1980
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ThesaHelp:
references c-d
Topic:
names as rigid designators
Topic:
unique numeric names as surrogates
Topic:
timestamps
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version control
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Thesa compiler and loader
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archives
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deletion of information
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implementation of Thesa data objects
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replicated data
Reference
Copeland, G., "What if mass storage where free? ", SIGIR , 15, 2, pp. 1-7 , March 1980 . Google
Other Reference
SIGMOD 10.4
2 ;;Quote: principle of individual preservation: object the same if modified; important for maintaining relationships
2 ;;Quote: use surrogate values to preserve individual identity; separates object id from descriptive data
2+ ;;Quote: current information by most recent timestamp; past information by previous timestamp
2 ;;Quote: represent modified object by original surrogate, new timestamp, modified data
3 ;;Quote: most existing databases for real-world systems require non-deletion; e.g., financial accounts
4 ;;Quote: can implement non-deletion by periodic checkpoint and an audit trail
4 ;;Quote: with timestamped data, queries can be concurrent with updates by using previous copy
ThesaHelp: references c-d (337 items)
Topic: names as rigid designators (43 items)
Topic: unique numeric names as surrogates (67 items)
Topic: timestamps (19 items)
Topic: version control (30 items)
Topic: Thesa compiler and loader (23 items)
Topic: archives (19 items)
Topic: deletion of information (11 items)
Topic: implementation of Thesa data objects (27 items)
Topic: replicated data (45 items)