Amar K. Das, Samson W. Tu, Gretchen P. Purcell, Mark A. Musen  Home/Search
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Abstract: We are developing a database implementation to support temporal data management for the T-HELPER physician workstation, an advice system for protocol-based care of patients who have HIV disease. To understand the requirements for the temporal database, we have analyzed the types of temporal predicates found in clinical-trial protocols. We extend the standard relational data model in three ways to support these querying requirements. First, we incorporate timestamps into the two-dimensional... (Update)
Context of citations to this paper: More
.... models are presented in [5,8,9,12,13,14] There are several extensions of relational databases with time and uncertainty (e.g. [7,11,15 19]) and, analogously, of PRO LOG [3,4,6,10] however, to our knowledge there is no uniform data model available that integrates the...
...memory. Queries of this type, involving issues of temporal duration, ordinal ordering and temporal context are described in Das et al. [13]. To achieve a query on a past attribute state, eg what was the value of heart rate at t 3 , we need to query whether t 3 is within the...
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BibTeX entry: (Update)
Das, A.K., Tu, S.W., Purcell, G.P., and Musen, M.A., "An extended SQL for Temporal Data Management in Clinical Decision-Support Systems", Proc. 16th Annual Symposium on Computer Applications in Medical Care (1992) 128--132 http://citeseer.ist.psu.edu/das92extended.html More
@misc{ das92extended,
author = "A. Das and S. Tu and G. Purcell and M. Musen",
title = "An extended SQL for Temporal Data Management in Clinical Decision-Support
Systems",
text = "Das, A.K., Tu, S.W., Purcell, G.P., and Musen, M.A., An extended SQL for
Temporal Data Management in Clinical Decision-Support Systems, Proc. 16th
Annual Symposium on Computer Applications in Medical Care (1992) 128--132",
year = "1992",
url = "citeseer.ist.psu.edu/das92extended.html" }
Citations (may not include all citations):1044 Maintaining knowledge about temporal intervals (context) - Allen - 1983
106 A Guide to the SQL Standard (context) - Date - 1989
69 Evaluation of relational algebra incorporating the time dime.. (context) - McKenzie, Snodgrass - 1991
63 A temporal relational model and a query language (context) - Navathe, Ahmed - 1989
56 Extensions to SQL for historical databases (context) - Sarda - 1990
9 Structured organization of clinical data bases (context) - Wiederhold, Fries et al. - 1975
2 A problem-solving architecture for managing temporal data an.. - Shahar, Tu et al. - 1992
2 MD: Computer Science Press (context) - Ullman - 1984
1 A historical relational data model for managing temporal dat.. (context) - Das, Tu et al. - 1992
1 Evaluation of an SQL model of the HELP patient database (context) - Huff, Berthelson et al. - 1991
1 Semantic Database Design (context) - Wiederhold
1 Computer support for community-based clinical research (context) - Musen, Carlson et al. - 1992
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