Thanks Ben,
Putting the absolute path worked without the chmod:
<AttributeMapping>
        <targetAttribute>om:observedProperty</targetAttribute>
        <ClientProperty>
                <name>xlink:href</name>
                <value>Vocab(METHOD, 'C:\Program Files\Apache Software 
Foundation\Tomcat 
8.0\webapps\geoserver\data\workspaces\om\OM_Observation\mapping.properties')</value>
        </ClientProperty>                                       
</AttributeMapping>

Can you report this as a bug change request for me?

Cheers
Bruce Simons
Information Modeller
CSIRO Land and Water/ Environmental Information Infrastructures
E: bruce.sim...@csiro.au T: +61 3 9252 6514 M: +61 475 954 391
PO Box 56, Highett, Victoria, 3190

-----Original Message-----
From: Ben Caradoc-Davies [mailto:b...@transient.nz] 
Sent: Wednesday, 18 November 2015 5:41 AM
To: Simons, Bruce (L&W, Clayton) <bruce.sim...@csiro.au>
Cc: geoserver-users@lists.sourceforge.net; Jody Garnett <jody.garn...@gmail.com>
Subject: Re: [Geoserver-users] app-schema mapping.properties file location

Bruce,

in a nutshell: ugly and not as documented, but it should work if you use an 
absolute path.

The documentation claims that the properties file can be an absolute path or 
relative to the mapping file, but I had a look in the implementation and I see 
no evidence of handling of paths relative to the mapping file:
http://docs.geoserver.org/latest/en/user/data/app-schema/cql-functions.html

Even the test coverage is relative to the home directory of the GeoTools 
module. Whatever you pass as the properties file "URI" (and it is not a
URI) is used raw as a path; if relative it is relative to the current working 
directory of the process (not useful), and if absolute it is the absolute path 
on the filesystem (ugly but workable).

For example, if GeoServer is running in Tomcat 7 on Debian and you put the 
mapping file in the root of the data directory, you might have something like 
this:

<OCQL>Vocab(ABBREVIATION,
'/var/lib/tomcat7/webapps/geoserver/data/mapping.properties')</OCQL>

You may also need to change the permissions to make sure Tomcat can read the 
file:

chmod 644 /var/lib/tomcat7/webapps/geoserver/data/mapping.properties

Kind regards,
Ben.

On 17/11/15 16:50, bruce.sim...@csiro.au wrote:
> The Geoserver app-schema documentation 
> (http://docs.geoserver.org/latest/en/user/data/app-schema/cql-functions.html) 
> has the example:
> <OCQL>Vocab(ABBREVIATION, '/test-data/mapping.properties')</OCQL>
>
> Where does this mapping.properties file go in the geoserver/data directory 
> structure?
> Wherever I put it I get the error:
> "Error applying mapping with targetAttribute om:observedProperty Argument 
> "value" should not be null"
>
> Cheers
> Bruce Simons
> Information Modeller
> CSIRO Land and Water/ Environmental Information Infrastructures
> E: bruce.sim...@csiro.au<mailto:bruce.sim...@csiro.au> T: +61 3 9252 
> 6514 M: +61 475 954 391 PO Box 56, Highett, Victoria, 3190
>
>
>
>
> ----------------------------------------------------------------------
> --------
>
>
>
> _______________________________________________
> Geoserver-users mailing list
> Geoserver-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/geoserver-users
>

--
Ben Caradoc-Davies <b...@transient.nz>
Director
Transient Software Limited <http://transient.nz/> New Zealand
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