[OpenLayers-Users] question about OpenLayers.Format.GML.v2

[Tim Schaub]

Hey-

bartvde at osgis.nl wrote:
> Hi list,
> 
> the constructor of the new GML2 parser gets a featureType parameter.
> 
> Does this mean that if a GML file contains multiple featureTypes, that I
> have to call read multiple times, and append the results myself? Will this
> be as efficient as doing the parsing in a single round?

Yeah, this is because up until this point, vector formats have been used 
to read/write collections of features, and I think of collections of 
features as layers.

I'd like to continue thinking that way (because I think it works).  But 
I know there are people who are interested in making WFS requests for 
multiple feature types (which I like to think of as layers).

I really want to get WFS working for the most common cases.  And I want 
it to be solid (with good support for transactions and filtered 
queries).  I've made a boatload of changes in the topp/wfs sandbox - 
including changes to the GML & Filter code.

My spare energy will be focussed on getting this code (the WFS protocol 
and related GML & Filter changes) in to the trunk.  Modifying the 
existing GML code is a bit at odds with that.

I also know that it will make sense to have the protocol be used in the 
absence of a layer.  And of course we want to support our OGC protocol 
power user(s).

Bart, can you describe (perhaps again) where you want to make a single 
request for multiple feature types.  I'm sure it is done all the time, I 
just usually see a way that I think it simpler, so I'm curious to hear 
more use cases.

Tim


> 
> Best regards,
> Bart
> 
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-- 
Tim Schaub
OpenGeo - http://opengeo.org
Expert service straight from the developers.