An aggregate RDF::Dataset supporting a subset of named graphs and zero or more named graphs mapped to the default graph.

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Maps named graphs from one or more RDF::Queryable instances into a single dataset, allowing a specific set of named graphs to be seen, as well as a default graph made up from one or more named graphs. This is used to implement RDF Datasets.


require 'rdf'
require 'rdf/aggregate_repo
require 'rdf/nquads'
repo = RDF::Repository.load("https://ruby-rdf.github.io/rdf/etc/doap.nq")

# Instantiate a new aggregate repo based on an existing repo
aggregate = RDF::AggregateRepo.new(repo)

# Use the default graph from the repo as the default graph of the aggregate

# Use a single named graph

# Retrieve all contexts
aggreggate.aggregate.graph_names #=> [RDF::URI("https://greggkellogg.net/foaf#me")]


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This repository uses Git Flow to mange development and release activity. All submissions must be on a feature branch based on the develop branch to ease staging and integration.

  • Do your best to adhere to the existing coding conventions and idioms.
  • Don't use hard tabs, and don't leave trailing whitespace on any line. Before committing, run git diff --check to make sure of this.
  • Do document every method you add using YARD annotations. Read the tutorial or just look at the existing code for examples.
  • Don't touch the .gemspec or VERSION files. If you need to change them, do so on your private branch only.
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  • Don't touch the AUTHORS file. If your contributions are significant enough, be assured we will eventually add you in there.
  • Do note that in order for us to merge any non-trivial changes (as a rule of thumb, additions larger than about 15 lines of code), we need an explicit public domain dedication on record from you, which you will be asked to agree to on the first commit to a repo within the organization. Note that the agreement applies to all repos in the Ruby RDF organization.


This is free and unencumbered public domain software. For more information, see https://unlicense.org/ or the accompanying UNLICENSE file.