Limit the external references

The
Filter
 field can be used to limit the external references available to a parameter where the
Reference Type
 is set to
Reference
. The parameter references the value of the external reference when the project is in operation. Reference-type parameters are defined so that the external references that are accessible to them are limited to those that meet certain criteria (filters).
To limit the external references available to a parameter
  1. In the decorator pane, double-click the parameter to open the
    Edit Parameter
     window.
  2. Under the
    UserInterface
     section, click the
    Filter
     setting and then click the ellipsis (...) button to open the Parameter Filter Builder window.
  3. The
    Filters
     tab lists the objects that can be used as filters. To add an object to a filter expression, double-click its listing. The object is added in this format:
    Library.[Classification Level] = ‘[Object Name]’
  4. To add a logical operator to the expression, either:
    1. Click the operator listing once.
    2. Enter the text manually.
  5. Click
    Validate
     to validate the filter. The filter is validated for internal syntax and data type. The validation bar displays green for a passed validation and red, with an error message, for a failed validation.
  6. Click
    OK
     to accept the filter expression.
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