### The TaskJuggler User Manual

Project Management beyond Gantt Chart Drawing

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Keyword | warn List Attribute

Purpose | The warn attribute adds a logical expression to the property. The condition described by the logical expression is checked after the scheduling and a warning is generated if the condition evaluates to true. This attribute is primarily intended for testing purposes.
Syntax | `warn (<operand> [(| | & | > | < | = | >= | <= | !=) <operand>...] | @ (all | none))`

Arguments

operand

An operand can consist of a date, a text string, a function, a property attribute or a numerical value. It can also be the name of a declared flag. Use the `scenario_id.attribute` notation to use an attribute of the currently evaluated property. The scenario ID always has to be specified, also for non-scenario specific attributes. This is necessary to distinguish them from flags. See columnid for a list of available attributes. The use of list attributes is not recommended. User defined attributes are available as well.

An operand can be a negated operand by prefixing a ~ character or it can be another logical expression enclosed in braces.

| | The 'or' operator
& | The 'and' operator
> | The 'greater than' operator
< | The 'smaller than' operator
= | The 'equal' operator
>= | The 'greater-or-equal' operator
<= | The 'smaller-or-equal' operator
!= | The 'not-equal' operator
Context | resource, supplement (resource), task, supplement (task)

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Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 by Chris Schlaeger <cs@taskjuggler.org>.TaskJuggler is a trademark of Chris Schlaeger.