To support the differing needs for sophisticated, rich searching, 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:
fcrepo-message-consumer currently supports the following triplestores:
See the External Triplestore page for more details on the triplestore setup. |
fcrepo-message-consumer currently supports the following indexer:
See the Solr Indexing Quick Guide to get quickly up and running with a Fedora 4 Solr integration. |
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
For a resource to be indexed it must:
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. |
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.
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 { } |