You can enable process participants in IBM® Process Portal to search for particular business data across process instances.
Now when IBM Business Process Manager runs instances of the BPDs that contain the configured variables, you can search for process instances that include these variables in IBM Process Portal.
<portal>
[Other properties, if <portal> section already exists]
<use-business-aliases-for-process-instances>true</use-business-aliases-for-process-instances>
</portal>