Appendix : Legacy Presto components : Mashables and Mashups : Mashups in EMML : Writing Mashups in EMML : Constructing the Mashup Result, Inputs or Intermediate Variables : <select>
<select>
 
<columns>
<column>
<select> Example
This statement selects specific nodes within all the repeating items in an input variable and places the result in a variable. This acts as a 'column filter,' selecting specific nodes (the ’columns’) within all repeating items (the ’rows’).
For more information and an example, see <select> Example. See also Working Samples for information on sample mashups that use this statement.
Can Contain
( columns )
Allowed In
mashup | catch | else | elseif | for | foreach | if | macro | operation | sequence | try | while
Attributes
Name
Required
Description
inputvariable
yes
The name of the input variable to select from.
selectexpr
An XPath expression that defines the set of repeating nodes in the input variable to use as the source to select from.
outputvariable
yes
The required variable to accept the output of this statement.
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