ext-rep file naming

Leonard Soicher l.h.soicher at qmul.ac.uk
Thu Oct 7 16:42:14 BST 2004


I agree with the proposal for a template file such as .invariants
in each database directory.

Leonard.

On Wed, Oct 06, 2004 at 05:47:43PM +0100, Peter Dobcsanyi wrote:
> On Wed, Oct 06, 2004 at 12:45:05PM +0100, Leonard Soicher wrote:
> > I propose to generalize the "parameter_section" to become the 
> > "list_invariant_section", and to be of the form 
> > 
> > xxxnnn-yyymmm-...
> > 
> > where xxx,yyy,...  are non-empty strings of letters (upper and lower
> > case allowed) and nnn,mmm,... are (possibly empty) strings of digits.
> ...
> 
> I agree. The suggested method is already implemented in the
> "mk-database-index" utility (Version: 0.2 / 257 and up).
> 
> > I also propose that we do not insist that all files in a given
> > directory have exactly the same list of names for list invariants, so
> > that it would be possible to have a blank entry in the table for a
> > given file for a given list invariant.
> 
> I am still thinking on the implementation of this variable list
> invariants feature. That could be a bit tricky. Start with these files:
> 
>     a2-b333333-c4 
>     a4-b1-c5-d11 
> 
> So far so good, but if the directory also contains files like:
> 
>     a99-n
>     a1-d2 
> 
> then it would not be easy to decide what should be the correct header of
> the corresponding table. Some file names can be mistyped, etc.
> 
> One way around this could be to use a template file, say ".invariants",
> which would list (and also fix the order of) the valid codes for list
> invariants in the given directory. For example, if ".invariants"
> contained the line:
> 
>     a b c d
> 
> then the firs two files and the last one above would be OK, but "a99-n"
> would be rejected.
> 
> --             ,
>     Peter Dobcsanyi
> 
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