Static Public Attributes | |
static final BooleanOperator | AND = new BooleanOperator() |
static final BooleanOperator | OR = new BooleanOperator() |
static final BooleanOperator | XOR = new BooleanOperator() |
static final BooleanOperator | SURROGATE = new BooleanOperator() |
Title: KDDML
Description: Knowledge Discovery in Database Environment
Copyright: Copyright (c) 2003-2005
Company: Universita' di Pisa - Dipartimento di Informatica
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And boolean operator. |
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Or boolean operator. |
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The operator 'xor' is only used with two arguments only, it indicates an evaluation to TRUE if the predicates evaluate to different values (one TRUE and one FALSE). |
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The surrogate operator. The operator surrogate provides a special means to handle logical expressions with missing values. It is applied to a sequence of predicates. The order of the predicates matters, the first predicate is the primary, the next predicates are the surrogates. Evaluation order is left-to-right. The cascaded predicates are applied when the primary predicate evaluates to 'Unknown'. Therefore, the surrogate predicates can provide a resolution to an undetermined predicate. |