DTDs dictionary contains DTDs/XML schema for biology XML currently available in Internet. If you find any others which are not listed here, please let me known. Your contribution is highly appreciated.

The DTDs/XML schema that are built for BioPNML: 

BioPNML.xsd
biopnml.dtd (test work!)
biopnml_old.dtd (combination of SBML and RENEW)

Other collecting DTDs that are built for BioX:

PNML: PNMLstNet.dtd  (PNMLstNet.xsd)
RENEW: RENEWxrn1.dtd
CPN: CPN.dtd
SBML: SBML.dtd  (SBML.xsd)
CellML: cellml_1_0.dtd
SEQ: seq.dt