Converting old style NEXUS files to new style NEXUS
===================================================

There exist two styles of the NEXUS file format. This program only
supports the new style. Your data is in new style NEXUS format,
if it contains a TAXA block.

To convert from an old style file to a new style file, the main step
is to add a taxon block to the top of the file. Your file should
start as follows:

#NEXUS
begin taxa;
dimensions ntax=99;
taxlabels
label1
label2
...
label99
;
end;

However, if the labels appear later in the DISTANCES or CHARACTERS block,
you can use the special taxon label _detect_. Then the program will
retrieve the labels from your data. (This is not a standard feature
of NEXUS and will not work with other programs).

E.g., type:
begin taxa;
dimensions ntax=99;
taxlabels _detect_;
end;

...


If you have a DATA block containing sequences, the rename the block
to CHARACTERS. Also, the DATATYPE statement must come first in the
OPTIONS command. Finally, if you have the statement OPTIONS gapmode=missing;
then delete this from the block.