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External indexing relies upon the objects you wish to have indexed to have an indexing:indexable mixin property. This can be done using the REST interface or via the fedora-node-types.cnd

Definition using the REST interface

Go to http://localhost:8080/rest/fcr:namespaces and in the Register Namespace form add:

     Prefix: indexing

     Namespace: http://fedora.info/definitions/v4/indexing#

Go to http://localhost:8080/rest/fcr:nodetypes and in the Update CND form add:  

[indexing:indexable] mixin
- indexing:hasIndexingTransformation (STRING) multiple COPY nofulltext noqueryorder

Definition via fedora-node-types.cnd

  Make sure your node definitions contain the following:

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https://github.com/futures/fcrepo-jms-indexer-pluggable

TODO: flesh out 

Load an LDPATH program

The following is an example of loading a LDPATH program called "custom".

curl -X POST -H "Content-Type: application/rdf+ldpath" -d "@post.txt" "http://localhost:8080/rest/fedora:system/fedora:transform/fedora:ldpath/custom/fcr:content"

post.txt:
@prefix fcrepo : <http://fedora.info/definitions/v4/repository#>
id      = . :: xsd:string ;
title = dc:title :: xsd:string;
uuid = fcrepo:uuid :: xsd:string ;

 Note that for solr indexing the field name (such as id, title, and uuid) must be match fields that are defined in the solr schema.xml.

Create objects with indexing properties

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curl -X POST -H "Content-Type: application/n3" "http://localhost:8080/rest/node/to/createanIndexableObject" -d "@body.rdf"

body.rdf:
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix indexing:<http://fedora.info/definitions/v4/indexing#>.
<object<> uri> rdf:type  <http://fedora.info/definitions/v4/indexing#indexable>
<> indexing:hasIndexingTransformation \"default\".

TODO: test