MSEADb-class            MSEADb objects
columns                 A function to return the columns of MSEA that
                        user can retrieve
dbInfo                  A function to return the database information
dbconn                  A function to return the connection to sqlite3
                        file
dbfile                  A function to return the directory that the
                        sqlite3 file stored
dbschema                A function to return the schema of
                        sqlite-database
keys                    A function defined by AnnotationDbi to return
                        the keys
keytypes                A function to return the columns that user can
                        specified in select function
makeMSEAPackage         Making MSEADb packages from corresponding table
                        as single data frame.
mseaListPathwaySubjects
                        A function to return the subject of pathways
                        used in the package
mseaNomenclature        A function to return the scientific name
mseaPackageName         A function to return the package name
mseaVersion             A function to return the MSEA data source
                        version of package
select                  select function defined by AnnotationDbi-class
species                 A function to return the name of organism
