Discussion List Archives

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Tidying up DDL1 (last time?)

James Hester wrote:

> How about just
> putting in standard POSIX match expressions from the DDL2 dictionary?

 > The "right" solution is to
> first change _list_reference to mean the same as _item_dependent in
> DDL2, ... and then drop
> _list_mandatory (as there are only these two items in the category
> _list_mandatory serves no practical function).     

If the way to properly fix DDL1 is to make it very similar to DDL2, this 
begs the question why not leave DDL1 alone and simply move to DDL2? 
 From a programming perspective it may be simpler to enhance programs to 
support DDL2 separately from DDL1, rather than to have to simulaneously 
support both DDL1-old and DDL1-new.  Or as in practice often happens 
with enhancements to formats written by users, a mixture of the two.

Matthew Towler


_______________________________________________
cif-developers mailing list
cif-developers@iucr.org
http://scripts.iucr.org/mailman/listinfo/cif-developers

Reply to: [list | sender only]
International Union of Crystallography

Scientific Union Member of the International Council for Science (admitted 1947). Member of CODATA, the ICSU Committee on Data. Member of ICSTI, the International Council for Scientific and Technical Information. Partner with UNESCO, the United Nations Educational, Scientific and Cultural Organization in the International Year of Crystallography 2014.

ICSU Scientific Freedom Policy

The IUCr observes the basic policy of non-discrimination and affirms the right and freedom of scientists to associate in international scientific activity without regard to such factors as ethnic origin, religion, citizenship, language, political stance, gender, sex or age, in accordance with the Statutes of the International Council for Science.