| CreateAccessUrlsAction | Class that creates access urls based on a given set of base urls. | 
| CreateSearchDocAction | Class that generates the Solr docs. | 
| FileObjectRegistrationAction | Class to register file objects. | 
| LidCheckerAction | Pre-ingest Crawler Action that checks to see if the logical identifier
 of a PDS4 data product contains URN reserved and/or excluded characters. | 
| LogMissingReqMetadataAction | Crawler action class that checks to see if the required metadata
 is missing. | 
| StorageIngestAction | Class that will ingest registered products to the PDS Storage
 Service. | 
| TitleLengthCheckerAction | Pre-ingest Crawler Action that checks to see that the title value is
 less than 255 characters. |