Please Help, how to Xinclude in schema.xml

[Turner, Robbin J]

I followed through some of the previous post, there seems to be a general 
problem with trying to us XInclude in the solr schema.xml.  I use several 
variation to include my  fieldType declarations.  I keep getting an error file 
not found.  I put the file first in the SOLRHOME, then in CATALINA_HOME/conf, 
then in just CATALINA_HOME.  All produced the same error.  If someone has an 
schema.xml example and placement (what path) that work I would greatly 
appreciate it.

Solrhome =  /opt/solr
Catalina_home = /opt/tomcat

A copy of the actual schema_type.xml was placed in /opt/solr/conf, 
/opt/tomcat/conf and /opt/tomcat
For each of the following xincludes, file not found was reported in the 
catalina.out:

Try #1
<?xml version="1.0" encoding="UTF-8"?>
<schema name="core1" version="1.2">
                <types>
                                <xi:include 
href="/opt/solr/conf/schema_type.xml" />
                </types>
                <fields>
                <field>....
                ...
                </fields>
</schema>

Try #2
<?xml version="1.0" encoding="UTF-8"?>
<schema name="core1" version="1.2">
                <types>
                                <xi:include href="${solr.core.instanceDir}/conf 
/schema_type.xml" />
                </types>
                <fields>
                <field>....
                ...
                </fields>
</schema>

Try #3
<?xml version="1.0" encoding="UTF-8"?>
<schema name="core1" version="1.2">
                <types>
                                <xi:include href="${catalina.home} 
/conf/schema_type.xml" />
                </types>
                <fields>
                <field>....
                ...
                </fields>
</schema>

Try #4
<?xml version="1.0" encoding="UTF-8"?>
<schema name="core1" version="1.2">
                <types>
                                <xi:include href="schema_type.xml" />
                </types>
                <fields>
                <field>....
                ...
                </fields>
</schema>

Try #4
<?xml version="1.0" encoding="UTF-8"?>
<schema name="core1" version="1.2">
                <types>
                                <xi:include href="schema_type.xml" />
                </types>
                <fields>
                <field>....
                ...
                </fields>
</schema>


Try #5
<?xml version="1.0" encoding="UTF-8"?>
<schema name="core1" version="1.2">
                <types>
                                <xi:include href="/opt/tomcat/schema_type.xml" 
/>
                </types>
                <fields>
                <field>....
                ...
                </fields>
</schema>

Try #6
<?xml version="1.0" encoding="UTF-8"?>
<schema name="core1" version="1.2">
                <types>
                                <xi:include 
href="/opt/tomcat/conf/schema_type.xml" />
                </types>
                <fields>
                <field>....
                ...
                </fields>
</schema>

Thanks in advance for any help.
robbin