cn=jsmith
  ph=6045551234
  ...

   myVar = user* // variable 
   cn=${myVar} // filter 
   cn=user\2a // filter after variable substitution with escaping enabled

LDAP Attribute Name:
Enter the name of the LDAP attribute to be stored as a context variable.
Context Variable Name:
Enter the name of a new context variable to hold the attribute value. Observe the naming rules for your new variables.
If multivalued:
If the attribute contains more than one value, indicate how the values should be handled:
Use first value:
Select this option to use only the first value, regardless of how many values are present.
Join with commas:
Select this option to concatenate all the values into one string, separated by commas. For example, if the context variable "medal" has three values
bronze, silver, gold
, choosing this option will define "medal" as "bronze, silver, gold".
Using this option, the individual elements in the value are not separately addressable as with the "Set multivalued context variable" option
Set multivalued context variable:
Select this option to place the values in an array where each element is addressable. Using the "medal" example from above, calling
${medal}
will return "bronze, silver, and gold". Calling
${medal[0]}
will return "bronze"; calling
${medal[2]}
will return "gold".
Fail:
Select this option to fail the assertion if the attribute contains more than one value.