[Geoserver-users] R: About GML schema file and mapping attributes

GeoServer GeoServer User
1

I understand.

But what about other GML-compliant elements, like gml:extentOf or gml:centerOf?
One would like to use as much as one can from the standard GML schema, but the WFS response doesn't seem to be aware of them.

The future feature model with much control is something related to the Complex Feature branch in GeoTools? Is it scheduled in the next GeoServer release (1.4)?

Thank you for your answers.

Best regards,

Fabio

-----Messaggio originale-----
Da: Chris Holmes [mailto:cholmes@anonymised.com]
Inviato: martedì 8 agosto 2006 17.13
A: Fabio Da Soghe
Cc: 'geoserver-users@lists.sourceforge.net'
Oggetto: Re: [Geoserver-users] About GML schema file and
mapping attributes

There's a hack to handle this. If you put this line in your
catalog.xml
file:

<citeConformanceHacks>true</citeConformanceHacks>

in the WFS sub section (within <service type = "WFS" enabled
= "true" >,
like the same level as serviceLevel, for example). Then it should
prefix name, description and boundedBy with a gml prefix.

We haven't made it an option in the web admin tool since it's pretty
hacky. In the future we hope to have a much better feature
model which
will give you a lot more control over such things.

best regards,

Chris

Fabio Da Soghe wrote:
> Hello list.
>
> I'm trying to creating a GML data model and I want to put it into
> GeoServer, backed by a PostGIS database. My XML Schema file is as
> follow:
>
> <xs:complexType name = "gmlfeature2_Type" > <xs:complexContent>
> <xs:extension base = "gml:AbstractFeatureType" >
> <xs:sequence>
> <xs:element ref="gml:extentOf" minOccurs="1"
maxOccurs="1"></xs:element>
> </xs:sequence>
> </xs:extension>
> </xs:complexContent>
> </xs:complexType>
>
> As per GeoServer documentation, I put this text in a
schema.xml file
> into the proper directory in the GeoServer installation (installed
> with the war file into Tomcat 5.5, linux box - version 1.3.2). I'm
> confident the info.xml is correct (I modified a generated
one). I can
> get a correct WFSDescribeFeatureType response from GeoServer. I
> created the corresponding PostGIS table:
>
> CREATE TABLE "public"."gmlfeature2" (
> "fid" VARCHAR NOT NULL,
> "name" VARCHAR,
> "description" VARCHAR,
> "boundedBy" "public"."geometry",
> "extentOf" "public"."geometry",
> CONSTRAINT "gmlfeature2_pkey" PRIMARY KEY("fid")
> [...] (I omitted spatial PostGIS constraints)
> ) WITHOUT OIDS;
>
> I successfully loaded some features into the table with some SQL
> INSERT.
>
> But when I query GeoServer (with a simple WFSGetFeature request), I
> get what seems to me a bad GML document. A single feature from the
> response is this (ddm is my own namespace's prefix):
>
> <ddm:gmlfeature2 fid="gmlfeature2.0"> <ddm:name>MyName</ddm:name>
> <ddm:description>MyDesc</ddm:description>
> <ddm:extentOf>
> <gml:Polygon
srsName="http://www.opengis.net/gml/srs/epsg.xml#4326&quot;&gt;
> <gml:outerBoundaryIs>
> <gml:LinearRing>
> <gml:coordinates decimal="." cs="," ts=" ">-20,20
20,20 20,-20 -20,-20 -20,20</gml:coordinates>
> </gml:LinearRing>
> </gml:outerBoundaryIs>
> </gml:Polygon>
> </ddm:extentOf>
> </ddm:gmlfeature2>
>
> I think it's bad because it puts every feature's attribute
in my own
> namespace (ddm), but all those attributes (name,
description) are from
> the standard GML 2 Schema, inherited from the base type
> AbstractFeatureType. extentOf is a GML-defined element, and
as such it
> should be prefixed by "gml:", not by my own prefix "ddm:" (which
> doesn't define such element).
>
> Am I right? Is there something I'm missing? Or this is a GeoServer
> behaviour and a GML data modeler *has* to design his/her data model
> with only custom attributes (all from the application namespace)?
>
> Thanks in advance for any feedback.
>
> Best regards,
>
> Fabio Da Soghe
>
>
>
>
----------------------------------------------------------------------
> ---
> Using Tomcat but need to do more? Need to support web
services, security?
> Get stuff done quickly with pre-integrated technology to
make your job easier
> Download IBM WebSphere Application Server v.1.0.1 based on
Apache Geronimo
>
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&

dat=121642

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2

Fabio Da Soghe wrote:

I understand.

But what about other GML-compliant elements, like gml:extentOf or gml:centerOf?

Not handled currently. I could be convinced to extend the hack to include those as well, it should be easy to do.

One would like to use as much as one can from the standard GML schema, but the WFS response doesn't seem to be aware of them.

The future feature model with much control is something related to the Complex Feature branch in GeoTools?

Yes.

Is it scheduled in the next GeoServer release (1.4)?

No, unfortunately it's not currently scheduled, due to lack of funding to push the effort through. We hope that someone will come up with funding soon though.

best regards,

Chris

Thank you for your answers.

Best regards,

Fabio

-----Messaggio originale-----
Da: Chris Holmes [mailto:cholmes@anonymised.com] Inviato: martedì 8 agosto 2006 17.13
A: Fabio Da Soghe
Cc: 'geoserver-users@lists.sourceforge.net'
Oggetto: Re: [Geoserver-users] About GML schema file and mapping attributes

There's a hack to handle this. If you put this line in your catalog.xml file:

<citeConformanceHacks>true</citeConformanceHacks>

in the WFS sub section (within <service type = "WFS" enabled = "true" >, like the same level as serviceLevel, for example). Then it should prefix name, description and boundedBy with a gml prefix.

We haven't made it an option in the web admin tool since it's pretty hacky. In the future we hope to have a much better feature model which will give you a lot more control over such things.

best regards,

Chris

Fabio Da Soghe wrote:

Hello list.

I'm trying to creating a GML data model and I want to put it into GeoServer, backed by a PostGIS database. My XML Schema file is as follow:

<xs:complexType name = "gmlfeature2_Type" > <xs:complexContent>
  <xs:extension base = "gml:AbstractFeatureType" >
   <xs:sequence>
    <xs:element ref="gml:extentOf" minOccurs="1"

maxOccurs="1"></xs:element>

   </xs:sequence>
  </xs:extension>
</xs:complexContent>
</xs:complexType>

As per GeoServer documentation, I put this text in a

schema.xml file

into the proper directory in the GeoServer installation (installed with the war file into Tomcat 5.5, linux box - version 1.3.2). I'm confident the info.xml is correct (I modified a generated

one). I can

get a correct WFSDescribeFeatureType response from GeoServer. I created the corresponding PostGIS table:

CREATE TABLE "public"."gmlfeature2" (
  "fid" VARCHAR NOT NULL, "name" VARCHAR, "description" VARCHAR, "boundedBy" "public"."geometry", "extentOf" "public"."geometry", CONSTRAINT "gmlfeature2_pkey" PRIMARY KEY("fid")
  [...] (I omitted spatial PostGIS constraints)
) WITHOUT OIDS;

I successfully loaded some features into the table with some SQL INSERT.

But when I query GeoServer (with a simple WFSGetFeature request), I get what seems to me a bad GML document. A single feature from the response is this (ddm is my own namespace's prefix):

<ddm:gmlfeature2 fid="gmlfeature2.0"> <ddm:name>MyName</ddm:name>
<ddm:description>MyDesc</ddm:description>
<ddm:extentOf>
  <gml:Polygon

srsName="http://www.opengis.net/gml/srs/epsg.xml#4326&quot;&gt;

   <gml:outerBoundaryIs>
    <gml:LinearRing>
     <gml:coordinates decimal="." cs="," ts=" ">-20,20

20,20 20,-20 -20,-20 -20,20</gml:coordinates>

    </gml:LinearRing>
   </gml:outerBoundaryIs>
  </gml:Polygon>
</ddm:extentOf>
</ddm:gmlfeature2>

I think it's bad because it puts every feature's attribute

in my own

namespace (ddm), but all those attributes (name,

description) are from

the standard GML 2 Schema, inherited from the base type AbstractFeatureType. extentOf is a GML-defined element, and

as such it

should be prefixed by "gml:", not by my own prefix "ddm:" (which doesn't define such element).

Am I right? Is there something I'm missing? Or this is a GeoServer behaviour and a GML data modeler *has* to design his/her data model with only custom attributes (all from the application namespace)?

Thanks in advance for any feedback.

Best regards,

Fabio Da Soghe

----------------------------------------------------------------------

---
Using Tomcat but need to do more? Need to support web

services, security?

Get stuff done quickly with pre-integrated technology to

make your job easier

Download IBM WebSphere Application Server v.1.0.1 based on

Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&

dat=121642

_______________________________________________
Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users

--
Chris Holmes
The Open Planning Project
http://topp.openplans.org