[Qgis-developer] Fields/attributes

[Albin Blaschka]

Hello,
sorry for intervening as an outsider...but maybe a tiny contribution...

Am 26.04.2013 02:39, schrieb Nathan Woodrow:
> Hey Chris,
>
> 1) I don't think there is any limit.  The name is just stored as a
> QString so anything it supports QGIS should too.

There are some limits in shapefiles concerning names in the attribute 
table, coming from the dbf - format. So, if at first the column names 
are e.g. longer than the eight characters allowed in dbf, and the user 
stores the data later as a shapefile, in this way, a problem could maybe 
  arise, especially if the long names are similar at the beginning...

regards,
Albin


>
> 2) I have noticed that too it is quite confusing at times.  To me fields
> should refer to the column information, and attributes should refer to
> the data it self, but that is not always the case in the API.
>
> - Nathan
>
>
> On Fri, Apr 26, 2013 at 10:33 AM, Chris Crook <ccrook at linz.govt.nz
> <mailto:ccrook at linz.govt.nz>> wrote:
>
>     Couple of questions with regard to QgsFeature fields and attributes:
>
>     1) Are there any guidelines/constraints regarding field names.  The
>     delimited text provider can take names from the first line of a text
>     file, and that can be very arbitrary.  I'm wondering if I should put
>     more constraints on the names (maximum number of characters, valid
>     character set, other...)
>
>     2) It seems that fields get referred to in various places as fields
>     and attributes in the API.  Is there any logic to this.  That is to
>     say, where should I use the word "field", and where should I use the
>     word "attribute"?
>
>     Thanks
>     Chris
>
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