> We want to do further development based on geoserver,and we will have to 
> implement the Web Feature Service Gazetteer service, however I can not find 
> the difference between them evenn I read the starands from OGC.
It is a "profile" of wfs that describes a specific set of featureTypes you need 
to publish. 
> Then I got no idea how to start my work.
I recently bid on some similar work, my research showed that the wfs-g profile 
was using an old version of the WFS specification (and thus would need to be 
updated to work). Talk to the wfs-g authors[1] to see what the progress is on 
that. If not you will need to do it yourself.

You then have a couple of implementation options:
a) use app-schema to map from your data model to the target schemas provided by 
wfs-g.
b) role your own data store in order to optimise performance / minimise risk 

In general the wfs-g profile was nice and small and would make a good 
"showcase" of app-schema support (since the domain of addresses is easily 
understood). 
> I think people in this list may be familar with the ogc web service.
You should check in with the OGC email lists as well. 

Jody
[1] http://www.opengeospatial.org/projects/groups/wfsgaz1.0swg
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