Looks in the list of valid names for perfect matching entry with a species full name. Either a valid name, a heteronym, a homonym or change of name. On matching the the valid name is written to a new database container called Valid_Name in the field NameString. A second field of this container called DescType tells about the species full name's status. I.e. whether it is the valid name, a heteronym, a homonym or misspelled. Three letters indicate species or genus, and three letter the status.