This method creates a directory called 'createdDirName' inside the 'workingDir' directory,
and then creates a file called 'createdFileName' located inside the newly created directory.
String xml: target xml
LinkFixupList lfl: Initialized by caller previous to making this call
String basePath: Used for resolving relative paths of Source link targets.
Returns the creation date of the database in the form
"yyyy-MM-ddThh:mm:ss[TsOffset]"
For example:
2003-01-02T11:30:00-05:00 or 2003-01-02T11:30:00
The latter form is assumed GMT relative.