Announcement—the temporal query language TSQL2 final language definition

1994 ◽  
Vol 23 (3) ◽  
pp. 34 ◽  
Author(s):  
Richard Thomas Snodgrass ◽  
Ilsoo Ahn ◽  
Gad Ariav ◽  
Don Batory ◽  
James Clifford ◽  
...  
1990 ◽  
Vol 15 (3) ◽  
pp. 349-357 ◽  
Author(s):  
Jinho Kim ◽  
Hodong Yoo ◽  
Yoonjoon Lee

1987 ◽  
Vol 12 (2) ◽  
pp. 247-298 ◽  
Author(s):  
Richard Snodgrass

1998 ◽  
Vol 07 (02n03) ◽  
pp. 167-186 ◽  
Author(s):  
SHI-KUO CHANG ◽  
ERLAND JUNGERT

To support the retrieval, fusion and discovery of multimedia information, a spatial/temporal query language for multiple data sources is needed. In this paper we describe a spatial/temporal query language, the ∑QL, which is based upon the σ-operator sequence and in practice expressible in an SQL-like syntax. The general σ-operator and temporal σ-operator are explained, and applications of the σ-query language to vertical/horizontal reasoning and hypermapped virtual world are discussed.


1991 ◽  
Vol 24 (5) ◽  
pp. 401-419 ◽  
Author(s):  
Michael G. Kahn ◽  
Samson Tu ◽  
Lawrence M. Fagan

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