August 2014
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560 pages
15h 32m
English
Content preview from Time and Relational Theory, 2nd Edition
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Chapter 18
Point and Interval Types Revisited
This chapter discusses a number of miscellaneous issues arising from the fundamental interval type notion and the related point type notion. First, it considers the possibility of supporting several distinct successor functions for “the same” point type; in particular, it shows how the concept of type inheritance can be used to support that possibility. It also considers the pragmatically important special case of intervals defined over points of type NUMERIC(p,q) for some precision p and scale factor q. This latter discussion leads to the need to extend the type inheritance concepts already discussed to deal with multiple inheritance. The chapter also revisits the notion of granularity from Chapter ...
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