[Bioperl-l] Bio::Tools::GuessSeqFormat unknown return value?

[Heikki Lehvaslaiho]

Bio::Tools::GuessSeqFormat returns now string 'unknown'. My question is: how 
strongly should we enforce the convention that unknown values return undef?

In practice, the choises are (1) undef, (2) empty string, (3) zero, (4) 
predefined string value.  What are are the advantages and disadvantages of 
this. Discuss.

I seem to remember that Hilmar felt strongly about this. ;-)

	-Heikki

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     _/  _/  _/  Heikki Lehvaslaiho    heikki_at_ebi ac uk
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