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In
Data, select a data query, and create an $ Input
parameter.
For example, MyParam.
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Use this input parameter in your data query.
For example, in the FILTER operator, with an expression like
b.country==$MyParam
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Add a Search visualization in your screen.
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In the Properties panel, from Select a Project
variable, select or create a context variable to link to the input
parameter.
The variable must be of type string.

Note:
You can also map a context variable to an input parameter in
Variables > Binding > Parameters.
Each time, you enter a query in the search field and click
, Data Perspective Studio updates the input parameter value.
