The files that are saved by the harvester include characters like %3A in their names. Why is that?
When the harvester saves records, it places each record in a single file, which is named using the OAI identifier associated with the record that was harvested. Reserved characters such as the colon ‘:’ are encoded using hexadecimal values in order to ensure the file name is valid on the file system. For example, if the OAI identifier for a given harvested record is oai:dlese.org:123-ABC, the file will be named oai%3Adlese.org%3A123-ABC.xml. The hexadecimal characters can be converted back to the original form as needed.
