The Work Item Import and Export BIC can be used in many ways when creating a process flow or subflow. The BIC allows you to import information and append it to a work item hash table or export information from the hash table, in delimited, Extensible Markup Language (XML), and fixed width formats. The BIC can only act to import or export files in a single activity. You can create a process flow with multiple Work Item Import and Export BICs.
In general, the goal should be to minimize the creation of work item properties used by a workflow as the greater the number of properties, the slower the performance of the workflow. Therefore, this BIC should not be used.