Well this discussion came up actually before during the development of the
wfs 1.1 spec and there were three options.
1. omit the element
2. create an empty element
3. use the xs:nil construct
In the end (1) was decided upon. (2) I believe creates invalid xml
documents and (3) I can't remember.
So long story short this would go against the specification so not
something we would want to do by default (perhaps by format_option?)
Then there is the question of other formats, like geojson which i believe
apply the same method for null properties that are null (although i could
be wrong).
On Wed, Aug 22, 2012 at 5:42 AM, Andrea Aime
<[email protected]>wrote:
> Hi all,
> as you probably know our current GML2 output (GetFeature and
> GetFeatureInfo)
> omits fully the elements whose value is null.
>
> This causes issues in some dumb clients, such as javascript ones, as they
> may
> show up a reduced set of attributes hiding the fact there are more.
> Now, one could run a DescribeFeatureType but WFS might be not enabled,
> and running an extra call might be undesirable anyways.
>
> What problems do you see if we start returning an empty element instead of
> no
> element at all for empty attributes? That is:
> <myAttribute/>
> Do you believe we could just do that by default, or should it have a
> configuration
> flag to enable/disable it?
>
> Coding wise for GML2 generation the change is trivial (and it would really
> be
> all I need, but I'm trying to think in more general terms).
> GML3 wise uh... not sure. Maybe it's just a matter of changing
> GML3EncodingUtils.encodeSimpleContent, but I may be wrong
>
> Opinions?
>
> Cheers
> Andrea
>
> --
> ==
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