Extending : Reference sample : How to extend a global function to manipulate collection data : Define global function in XML
  
Define global function in XML
1 Create a new plug-in project or use the already existing one [Find reference topic].
2 Create a new folder under the project; for example, name it as ‘CEGlobalFunctions.
3 Create an xml file under the folder; for example, name it as ‘BTTWildCardFunctions.xml’.
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4 Define the signature of global function. Notice that, the type of input parameter should be set as ‘Array’ to enable the property editor used for collection data manipulation.
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How to extend a global function to manipulate collection data