Humberto Ortiz Zuazaga wrote: > > Example, image we want to support 4 file formats: > > genbank - internal > pdb - internal > fasta - internal > bsml - internal > > vs converters between the same 4 formats: > > genbank - pdb > genbank - fasta > genbank - bsml > pdb - fasta > pdb - bsml > fasta - bsml Ah, but you really only need 3 (vs. 4 for an internal format)! genbank - pdb genbank - fasta genbank - bsml Because you can do this: pdb - genbank - fasta pdb - genbank - bsml fasta - genbank - bsml To get the other 3! Tee hee hee :-) Cheers. Jeff -- +----------------------------+ | J.W. Bizzaro | | jeff at bioinformatics.org | | | | THE OPEN LAB | | Open Source Bioinformatics | | | | http://bioinformatics.org/ | +----------------------------+