ActiveFedora::Crosswalks

Enables metadata crosswalking between ActiveFedora datastreams.

Installation

Add this line to your application's Gemfile:

gem 'active_fedora-crosswalks'

And then execute:

$ bundle

Or install it yourself as:

$ gem install active_fedora-crosswalks

Usage

In the datastreams you'd like to enable for crosswalking include ActiveFedora::Crosswalks::Crosswalkable Example:

class ExampleRdfDatastream < ActiveFedora::NtriplesRDFDatastream
  include ActiveFedora::Crosswalks::Crosswalkable
end

Example - Crosswalking between RDF Datastreams

class Asset < ActiveFedora::Base
  has_metadata :name => 'descMetadata', :type => ExampleRdfDatastream
  has_metadata :name => 'xwalkMetadata', :type => ExampleRdfDatastream do |ds|
    ds.crosswalk :field => :title, :to => :other_title, :in => :descMetadata
  end
end

Example - Crosswalking from Rels-EXT to RDF Datastreams

class Asset < ActiveFedora::Base
  has_metadata :name => 'xwalkMetadata', :type => ExampleRdfDatastream do |ds|
    ds.crosswalk :field => :set, :to => :is_member_of_collection, :in => "RELS-EXT"
  end
end

Example - Deep crosswalking from OM Datastreams to RDF

class Asset < ActiveFedora::Base
  has_metadata :name => 'descMetadata', :type => DummyOmDatastream
  has_metadata :name => 'xwalkMetadata', :type => ExampleRdfDatastream do |ds|
    ds.crosswalk :field => :name, :to => [:name, :family_name], :in => :descMetadata
  end
end

NOTE: Currently there is no support for defining datastreams other than RDF datastreams as crosswalk destinations. Pull Requests Accepted.

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request