Hi,
The shape files should not constrain us with the column length anymore.
Meanwhile, QGIS-Dev (master) even handles the column shortening and
conflict detection (if shortened columns collide because of the
shortening) correctly. This wasn't the case in older versions. Thanks to
whoever fixed that!
Personally I would avoid characters outside of the [a-zA-Z_] range in
column names. Some formates may have troubles with these other
characters.
Andreas
On Fri, 26 Apr 2013 08:41:45 +0200, Albin Blaschka wrote:
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 <[email protected]
<mailto:[email protected]>> 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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