[Qgis-developer] Fields/attributes

Albin Blaschka albin.blaschka at standortsanalyse.net
Thu Apr 25 23:41:45 PDT 2013

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...


> 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
>     This message contains information, which is confidential and may be
>     subject to legal privilege. If you are not the intended recipient,
>     you must not peruse, use, disseminate, distribute or copy this
>     message. If you have received this message in error, please notify
>     us immediately (Phone 0800 665 463 or info at linz.govt.nz
>     <mailto:info at linz.govt.nz>) and destroy the original message. LINZ
>     accepts no responsibility for changes to this email, or for any
>     attachments, after its transmission from LINZ. Thank You.
>     _______________________________________________
>     Qgis-developer mailing list
>     Qgis-developer at lists.osgeo.org <mailto:Qgis-developer at lists.osgeo.org>
>     http://lists.osgeo.org/mailman/listinfo/qgis-developer
> _______________________________________________
> Qgis-developer mailing list
> Qgis-developer at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-developer

| Albin Blaschka, Mag.rer.nat.
| Etrichstrasse 26, A-5020 Salzburg
| * www.albinblaschka.info * www.thinkanimal.info *
| - It's hard to live in the mountains, hard but not hopeless!

More information about the Qgis-developer mailing list