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To support the differing needs for sophisticated, rich searching, fedora Fedora 4 comes with a standard mechanism and integration point for indexing content in an external service. This could be a general search service such as Apache Solr or a standalone triplestore such as Sesame or Fuseki. |
To set up external index and searching you must:
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Install and configure standalone search applications
fcrepo-message-consumer currently supports the following triplestores:
- Jena Fuseki (Fuseki setup instructions)
- Sesame (Sesame setup instructions)
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See the External Triplestore page for more details on the triplestore setup. |
fcrepo-message-consumer currently supports the following indexer:
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See the Solr Indexing Quick Guide to get quickly up and running with a Fedora 4 Solr integration. |
Install and configure fcrepo-message-consumer
The fcrepo-message-consumer project includes software for a web service that sits between your Fedora 4 repository and an external search service. As its name implies, it is a generic framework that allows for easy extension for integrating unanticipated or proprietary services with the Fedora 4 repository. There are proof-of-concept implementations for Jena Fuseki, Sesame and Apache Solr.
The following github page has detailed instructions as to how to set up fcrepo-message-consumer. This standalone app listens to messages produced by fcrepo4 and invokes the search applications as configured:
https://github.com/fcrepo4/fcrepo-message-consumer
Mark a resource as indexable and assign an appropriate indexing transformation
For a resource to be indexed it must:
- have the rdf type http://fedora.info/definitions/v4/indexing#indexable
- (optionally) have the property http://fedora.info/definitions/v4/indexing#hasIndexingTransformation set to a registered index transformation
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A default indexing transformation exists that maps the appropriate properties to the field names "title", "uuid" and "id". To meet your needs, you can write and register custom indexing transformations. |
Create new objects with indexing properties
For an object to be indexed it must have a rdf:type of indexing:indexable, and optionally a indexing:hasIndexingTransformation corresponding to an LDPATH program.
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curl -X PATCH -H "Content-Type: application/sparql-update" --data-binary "@object.rdf" "http://localhost:8080/rest/indexableObject"
object.rdf:
PREFIX dc: <http://purl.org/dc/elements/1.1/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX indexing: <http://fedora.info/definitions/v4/indexing#>
DELETE { }
INSERT {
<> indexing:hasIndexingTransformation "default";
rdf:type indexing:indexable;
dc:title "This title will show up in the index." }
WHERE { } |