Chemical Markup Language

Filename Extensions	cml
Chemical MIME Type	chemical/x-cml
Specification URL	http://wwmm.ch.cam.ac.uk/moin/ChemicalMarkupLanguage
Import	Yes
Export	Yes
Open Babel Version	1.100 and later

Options

 XML format. This implementation uses libxml2.
 Write options for CML: -x[flags] (e.g. -x1ac)
 1  output CML1 (rather than CML2)
 a  output array format for atoms and bonds
 h  use hydrogenCount for all hydrogens
 m  output metadata
 x  omit XML and namespace declarations
 N<prefix> add namespace prefix to elements

Additional Comments

The XML formats require the XML text to be well formed but generally interpret it fairly tolerantly. Unrecognised elements and attributes are ignored and there are rather few error messages when any required structures are not found.