[GRASS-dev] grass7 - renamed optiont

Helena Mitasova hmitaso at ncsu.edu
Tue Jun 14 00:12:38 EDT 2011

On Jun 12, 2011, at 3:03 AM, Glynn Clements wrote:

> Helena Mitasova wrote:
>> In grass7 the names of options for some commands were changed 
>> (but the manuals were not updated).
>> http://trac.osgeo.org/grass/wiki/Grass7/NewFeatures#Renamedoptions
>> I would like to update the manuals for r.flow, r.sim.water and r.sim.sediment, 
>> to reflect the change but first I would like to ask - is this change really necessary?
> Yes. And we there are probably some more which should be changed (and
> some of those listed on that page should be changed further).
> In general: consistency is good, abbreviations are bad. And 7.0
> provides an opportunity to fix past mistakes.
>> If yes, I would like to change the two last options to more meaningful terms as follows:
>> dsout -> density --> accumulation (or just accum?)
> There is no reason to abbreviate an option name. The parser recognises
> abbreviations provided that they are unambiguous, but it won't
> recognise an unabbreviated name if the option name itself is
> abbreviated.
> 7.0 takes this a step further: if an option name consists of multiple
> words separated by underscores, you can abbreviate or omit individual
> words and/or omit the underscores; e.g. an option named "levels_red"
> could be abbreviated to "lev_red", "lev_r", or even just "lr".
> So there shouldn't be any need to use abbreviations when choosing
> option names. In some cases, it may be worth adding underscores
> between the lexemes of compound words in order to facilitate
> abbreviation.

thanks for the explanation - I updated r.flow accordingly.
> The only caveat is that an abbreviation given on the command line must
> not match multiple options, or else an error occurs; there is no "best
> match" rule.
> For this reason, no option should be a prefix of another. So instead
> of e.g. "red" and "red_levels" (which would make "r=..." ambiguous),
> the latter becomes "levels_red".

there is one like this that I almost always get wrong 
d.vect mypoints siz=10 

does not work because there is

size and size_column

> -- 
> Glynn Clements <glynn at gclements.plus.com>

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