Create a list of prefixes to be used when defying the SPARQL query to retrieve the tables
prefixList(endpoint)A string of type character containing the endpoint where the table is stored.
The valid values are "CELLAR" and "FAO".
prefixList() returns a list of prefixes to be used when defying the SPARQL query.
{
endpoint = "CELLAR"
prefix_list = prefixList(endpoint)
}