modules/rdf/graph.zzm

rdf-0.0.3 documentation

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Package

Name
rdf
Version
0.0.3
Uploaded
2026-06-12 23:55:02
Repository
https://github.com/tobyink/zuzu-rdf
Dependencies
Metadata
zuzu-distribution.json
Archive
Download .tar.gz

NAME

rdf/graph - RDF graph and dataset utility functions.

SYNOPSIS

  from rdf/graph import rdf_graph_isomorphic, rdf_quads_union;

  let combined := rdf_quads_union(left, right);
  ok(rdf_graph_isomorphic(actual, expected));

DESCRIPTION

This module provides helpers for sorting, deduplicating, comparing, and rewriting arrays of RDF quads. Dataset helpers consider graph terms; graph helpers compare only default-graph quads.

EXPORTS

Functions

  • rdf_quad_key(RDFQuad quad)

    Returns a stable key for a quad.

  • rdf_quads_sort(Array quads)

    Returns quads sorted by rdf_quad_key.

  • rdf_quads_unique(Array quads)

    Returns sorted quads with duplicates removed.

  • rdf_quads_union(Array left, Array right)

    Returns the set union of two quad arrays.

  • rdf_quads_minus(Array left, Array right)

    Returns quads from left that are not in right.

  • rdf_quads_intersection(Array left, Array right)

    Returns quads present in both arrays.

  • rdf_quads_patch(Array quads, Array remove, Array add)

    Applies a remove/add patch and returns the resulting unique quads.

  • rdf_dataset_canonical_lines(Array quads)

    Returns canonical string lines for a dataset, including blank node renaming.

  • rdf_dataset_canonical_string(Array quads)

    Returns the canonical dataset string.

  • rdf_datasets_isomorphic(Array left, Array right)

    Returns true when two datasets are isomorphic.

  • rdf_graph_isomorphic(Array left, Array right)

    Returns true when the default graphs in two quad arrays are isomorphic.

  • rdf_relabel_blank_nodes(Array quads, Dict labels)

    Returns quads with blank node labels replaced according to labels.

  • rdf_stable_relabel_blank_nodes(Array quads, String prefix := "b")

    Relabels blank nodes deterministically by their original labels.

  • rdf_skolemize_blank_nodes(Array quads, String base := "urn:zuzu:rdf:skolem:")

    Replaces blank nodes with IRI terms under base.

COPYRIGHT AND LICENCE

rdf/graph is copyright Toby Inkster.

It is free software; you may redistribute it and/or modify it under the terms of either the Artistic License 1.0 or the GNU General Public License version 2.