This page (revision-11) was last changed on 13-Jun-2014 17:49 by Albrecht Striffler

This page was created on 07-Mar-2013 06:26 by Volker Belli

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Doc Conditions
Doc Conditions

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At line 2 removed one line
At this page you can find the documentation for conditions. Conditions are an essential part of several markups, e.g. [rules | Doc Rules], [covering lists | Doc CoveringList], and checks in [test cases | Doc TestCaseTable]. Conditions are used to define a logical expression on some findings and/or outcomes of a d3web diagnostic session, to tell d3web how to action under specific circumstances.
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At this page you can find the documentation for conditions. Conditions are an essential part of several markups, e.g. [rules | Doc Rules], [covering lists | Doc SetCoveringKnowledge], [abstraction tables | Doc AbstractionTable] and [test cases | Doc TestCaseTable]. Conditions are used to define a logical expression on some findings and/or outcomes of a d3web diagnostic session, to tell d3web how to action under specific circumstances.
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// note: for multiple-choice questions the operator evaluates to "true"
// if the compared choice is selected, regardless is any other choice is
// additionally selected.
// note: for multiple-choice questions this evaluated to "true"
// if the choice is selected, regardless is any other choice is
// additionally selected
// thus the following example might become true for those questions
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// check if the question is answered with a value of its normal range,
// or if the value is "unknown" (which means that the "unknown" choice
// check if the value is "known" (a value of its normal range is
// answered) or if the value is "unknown" (the "unknown" choice
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// check a question value to match a regular expression.
// the operator evaluates to "true" if the regular expression matches
// the whole answer given to the question. This is usually used for
// text questions. Please note that the regular expression is quoted in "/"
// check a question to match a regular expression.
// the operator evaluates to "true" if the regular expression
// matches the whole answer given.
// for more details to regular expression, see e.g. [http://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html]
// note: the special "/" before and after the regular expression
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/%
%
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For more details to regular expression, see e.g. [java documentation of regular expressions | http://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html].
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Especially for numerical questions, there is a set of additional test operators.
%%prettify
{{{
// first we might use the original compare to equal,
// both operators are the same
num-question = 10
num-question == 10
// there are also checks against limits of various types
num-question <= 10
num-question >= 10
num-question < 10
num-question > 10
// finally there is a special operator to check for intervals
// note that open and closed intervals borders are allowed for this
num-question [10 20]
num-question ]10 20]
num-question [10 20[
num-question ]10 20[
}}}
/%
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The following operators can be used to build more complex expressions from simple rule conditions:
* __NOT__(condition): true, if the condition does not apply
* (condition1) __AND__ (condition2): true, only if both conditions apply at the same time
* (condition1) __OR__ (condition2): true, if at least one of the conditions do apply
!! Complex Formulas as Conditions
For more complex formulas on any values there is an additional plugin available. Be aware, that this extension is non-LGPL-licensed for commercial use: [Extended Expressions: Conditions and actions | Doc Expressions]
This page (revision-11) was last changed on 13-Jun-2014 17:49 by Albrecht Striffler Top