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142 vFoglight
Web Component Guide
A Data Runtime Value cannot have parameters, but it can have On Null.
There are some significant differences between the usage of a Query Selection Runtime
Value and a Data Runtime Value. You do not have to specify the Data Source ID for
queries to enable them to select from the default Data Source. By contrast, Data
Runtime Values do have to have their Data Source ID specified. As a result, they are
generally only used for testing or in User Modules, never in System Modules because
the Data Source ID in System Modules is not known in advance. Queries are much more
flexible and powerful than Data Runtime Values.
Date
A Date object.
List
The List Runtime Value must always have parameters. It allows you to either make a list
containing the values of each of the parameters, or to make a list that merges all
elements in the values of the parameters into one list.
Data Object A tree of all of the data available for the given Data Source ID
is displayed. You select the desired data object by expanding the
tree as required, and then clicking on a data element. This could
represent a list of data objects, a single data object, or a simple
property of a data object, such as a string property. This is
somewhat similar to the Path parameter on a Query Selection,
or Context Selection, or the Root Path property of a Query.
Renderer A drop-down list allows you to choose a renderer the existing
group of System renderers, or ones that have been added to user
modules. See “Renderers” on page 148.
Property Description
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