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Custom Namespace registry
This new optional feature allows an administrator to provide a list of custom namespace prefixes , which overrides the standard namespace registry used by Modeshapethat will override the default prefix registry. The custom namespaces can be are loaded on start-up via a YAML file with the path given to the application and the . The namespaces can be modified while Fedora is operational with the modifications only taking several minutes to propagate.running. Changes may take a few minutes to take effect.
Below is a sample YAML namespace configuration file, Let us assume somewhere on the same file system Fedora is installed upon, the following YAML file named custom_namespaces.yml exists.
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premis: http://www.loc.gov/premis/rdf/v1# test: info:fedora/test/ memento: http://mementoweb.org/ns# rdfs: http://www.w3.org/2000/01/rdf-schema# webac: http://fedora.info/definitions/v4/webac# acl: http://www.w3.org/ns/auth/acl# vcard: http://www.w3.org/2006/vcard/ns# iana: http://www.iana.org/assignments/relation/ xsi: http://www.w3.org/2001/XMLSchema-instance xmlns: http://www.w3.org/2000/xmlns/ rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns# xml: http://www.w3.org/XML/1998/namespace ebucore: http://www.ebu.ch/metadata/ontologies/ebucore/ebucore# ldp: http://www.w3.org/ns/ldp# dcterms: http://purl.org/dc/terms/ xs: http://www.w3.org/2001/XMLSchema fedoraconfig: http://fedora.info/definitions/v4/config# foaf: http://xmlns.com/foaf/0.1/ dc: http://purl.org/dc/elements/1.1/ awesome: http://example.com/awesome/ |
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Fedora can activate the file by using the -Dfcrepo.namespace.registry switch system parameter, either on the command line or by adding it to the list of other switches params that provide paths to other configuration files:
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Once Fedora is running, checking the available namespaces should return the list of custom namespaces and not the standard Modeshape system generated namespaces:
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curl -ufedoraAdmin:fedoraAdmin http://localhost:8080/rest/ # Status 200 # @prefix premis: <http://www.loc.gov/premis/rdf/v1#> . # @prefix test: <info:fedora/test/> . # @prefix memento: <http://mementoweb.org/ns#> . # @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . # @prefix webac: <http://fedora.info/definitions/v4/webac#> . # @prefix acl: <http://www.w3.org/ns/auth/acl#> . # @prefix vcard: <http://www.w3.org/2006/vcard/ns#> . # @prefix xsi: <http://www.w3.org/2001/XMLSchema-instance> . # @prefix awesome: <http://example.com/awesome/> . # @prefix xmlns: <http://www.w3.org/2000/xmlns/> . # @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . # @prefix fedora: <http://fedora.info/definitions/v4/repository#> . # @prefix xml: <http://www.w3.org/XML/1998/namespace> . # @prefix ebucore: <http://www.ebu.ch/metadata/ontologies/ebucore/ebucore#> . # @prefix ldp: <http://www.w3.org/ns/ldp#> . # @prefix dcterms: <http://purl.org/dc/terms/> . # @prefix iana: <http://www.iana.org/assignments/relation/> . # @prefix xs: <http://www.w3.org/2001/XMLSchema> . # @prefix fedoraconfig: <http://fedora.info/definitions/v4/config#> . # @prefix foaf: <http://xmlns.com/foaf/0.1/> . # @prefix dc: <http://purl.org/dc/elements/1.1/> . ... |
Now, lets say for example that the awesome Suppose, you later decide that "awesome" namespace was not required. Edit the file /my/fedora/path/custom_namespaces.yml to remove the "awesome" namespace line, save the file and wait a moment or two, then check the namespace output again:
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