TY - GEN
T1 - Semantics of time-varying attributes and their use for temporal database design
AU - Jensen, Christian S.
AU - Snodgrass, Richard T.
N1 - Publisher Copyright:
© Springer-Verlag Berlin Heidelberg 1995.
PY - 1995
Y1 - 1995
N2 - Based on a systematic study of the semantics of temporal attributes of entities, this paper provides new guidelines for the design of temporal relational databases. The notions of observation and update patterns of an attribute capture when the attribute changes value and when the changes are recorded in the database. A lifespan describes when an attribute has a value. And derivation functions describe how the values of an attribute for all times within its lifespan axe computed from stored values. The implications for temporal database design of the semantics that may be captured using these concepts are formulated as schema decomposition rules.
AB - Based on a systematic study of the semantics of temporal attributes of entities, this paper provides new guidelines for the design of temporal relational databases. The notions of observation and update patterns of an attribute capture when the attribute changes value and when the changes are recorded in the database. A lifespan describes when an attribute has a value. And derivation functions describe how the values of an attribute for all times within its lifespan axe computed from stored values. The implications for temporal database design of the semantics that may be captured using these concepts are formulated as schema decomposition rules.
UR - http://www.scopus.com/inward/record.url?scp=70349365656&partnerID=8YFLogxK
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U2 - 10.1007/bfb0020547
DO - 10.1007/bfb0020547
M3 - Conference contribution
AN - SCOPUS:70349365656
SN - 3540606726
SN - 9783540606727
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 366
EP - 377
BT - OOER 1995
A2 - Papazoglou, Michael P.
PB - Springer-Verlag
T2 - 14th International Conference on Object-Oriented Entity-Relationship, OOER 1995
Y2 - 13 December 1995 through 15 December 1995
ER -