NAME

       Chemistry::File::SDF - MDL Structure Data File reader/writer

SYNOPSIS

           use Chemistry::File::SDF;

           # Simple interface (all at once)
           # read all the molecules in the file
           my @mols = Chemistry::Mol->read('myfile.sdf');

           # assuming that the file includes a <PKA> data item...
           print $mols[0]->attr("sdf/data")->{PKA};

           # write a bunch of molecules to an SDF file
           Chemistry::Mol->write('myfile.sdf', mols => \@mols);

           # or write just one molecule
           $mol->write('myfile.sdf');

           # Low level interface (one at a time)
           # create reader
           my $reader = Chemistry::Mol->file('myfile.sdf');
           $reader->open('<');
           while (my $mol = $reader->read_mol($reader->fh)) {
               # do something with $mol
           }

DESCRIPTION

       MDL SDF (V2000) reader.

       This module automatically registers the 'sdf' format with Chemistry::Mol.

       The parser returns a list of Chemistry::Mol objects.  SDF data can be accessed by the
       $mol->attr method. Attribute names are stored as a hash ref at the "sdf/data" attribute,
       as shown in the synopsis. When a data item has a single line in the SDF file, the
       attribute is stored as a string; when there's more than one line, they are stored as an
       array reference. The rest of the information on the line that holds the field name is
       ignored.

       This module is part of the PerlMol project, <https://github.com/perlmol>.

CAVEATS

       Note that by storing the SDF data as a hash, there can be only one field with a given
       name. The SDF format description is not entirely clear in this regard.  Also note that SDF
       data field names are considered to be case-sensitive.

SOURCE CODE REPOSITORY

       <https://github.com/perlmol/Chemistry-File-MDLMol>

SEE ALSO

       Chemistry::Mol

       The MDL file format specification.
       <http://www.mdl.com/downloads/public/ctfile/ctfile.pdf> or Arthur Dalby et al., J. Chem.
       Inf. Comput. Sci, 1992, 32, 244-255.

AUTHOR

       Ivan Tubert-Brohman <itub@cpan.org>

COPYRIGHT

       Copyright (c) 2009 Ivan Tubert-Brohman. All rights reserved. This program is free
       software; you can redistribute it and/or modify it under the same terms as Perl itself.