Retrieve a List of Available NCBI Databases for DownloadSource:
This function allows you to retrieve a list of database names and versions that can be downloaded from correspondning servers.
Database retrieval is crucial for most biological studies and analyses.
There is a vast diversity of databases that can be accessed remotely or that
can be downloaded to your local machine. This function provides an interface
to databases that can be downloaded from NCBI servers and lists all available
databases and their database version to be able to select an appropriate
database for download with
a character string specifying the name of the database that shall be searched for.
a logical value specifying whether or not the local listDatabases.txt file shall be updated by remote access to NCBI.