v0.69.0: toRdf harness — compare RDF datasets as sets (dedupe quads) (+1 toRdf)

- The toRdf comparison now de-duplicates quads before comparing, matching the
  RDF data model (a dataset is a SET of quads, compared up to isomorphism). The
  same value reached through two @index keys yields the same triple once its
  @index is dropped in RDF; our toNQuads already serialises a proper
  de-duplicated set, but the harness's line-multiplicity comparison wrongly
  demanded the reference fixture's duplicate lines (#te036). No library code
  changed — the processor's toRdf output is unchanged and remains a valid
  (de-duplicated) RDF dataset.

W3C (toEqual gate): toRdf 459->460 (+1); expand 378, compact 246 (100%)
unchanged. Unit 285 green; phpstan max clean; pint clean; 0 regressions.

The remaining 7 toRdf failures are all genuine blockers (same set as the
expansion tail): tc031, tc032, tc033, te128, ter56, tin06, tjs10.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: skydudie

CHANGELOG.md

@@ -7,6 +7,35 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.69.0] - 2026-06-10
+
+toRdf harness: compare RDF datasets as sets (de-duplicate quads).
+
+W3C JSON-LD 1.1 test suite (corrected `toEqual` gate):
+
+```
+            expand   compact   toRdf
+v0.68.0:      378      246      459
+v0.69.0:      378      246      460   (+1 toRdf)
+```
+
+### Fixed (test harness)
+
+- The toRdf comparison now de-duplicates quads before comparing, matching the
+  RDF data model (a dataset is a *set* of quads, compared up to isomorphism).
+  The same value reached through two `@index` keys yields the same triple once
+  its `@index` is dropped in RDF; our `toNQuads` already serialises a proper
+  de-duplicated set, but the harness's line-multiplicity comparison wrongly
+  expected the reference fixture's duplicate lines (`#te036`). No library code
+  changed — the processor's toRdf output is unchanged and remains a valid
+  (de-duplicated) RDF dataset.
+
+The remaining 7 toRdf failures are all genuine environment/spec-accommodation
+blockers — the same set as expansion's tail: `#tc031` (offline relative URL),
+`#tc032`/`#tc033` (unused-context error), `#te128` (shared-context circular
+ref), `#ter56` (VC `@context`-term accommodation), `#tin06` (json.api),
+`#tjs10` (PHP `json_decode` `{}`-vs-`[]`).
+
 ## [0.68.0] - 2026-06-10
 
 toRdf: JSON Canonicalization Scheme for `@json` literals.

README.md

@@ -31,7 +31,7 @@ A PHP implementation of the [JSON-LD 1.1](https://www.w3.org/TR/json-ld11/) spec
 - [x] Custom `DocumentLoader` interface
 - [~] Expansion (§5.5) — implemented; ~378/385 of the W3C expand suite (the remaining 7 are environment/spec-accommodation blockers)
 - [x] Compaction (§5.6) — **246/246 of the W3C compact suite (100%)**: container-maps (incl. property-valued `@index`, `@type`-map node refs), keyword recursion, `@nest`, nested `@list`, `@graph` maps, `@reverse` (incl. per-value term selection and containers), full inverse-context term scoring (list/direction-aware, `@json` literals), property-/type-scoped contexts with scoped `@base`/`@vocab`, IRI relativisation, expand-first normalisation, the `compactArrays` option, §5.7 prefix rules and error conditions
-- [~] Serialize JSON-LD to RDF (§7 / `toRdf`) — implemented; ~459/467 of the W3C toRdf suite (N-Quads output incl. `rdfDirection`, `produceGeneralizedRdf`, and JCS `@json` canonicalization)
+- [~] Serialize JSON-LD to RDF (§7 / `toRdf`) — implemented; **460/467 of the W3C toRdf suite** (the remaining 7 are environment/spec-accommodation blockers); N-Quads output incl. `rdfDirection`, `produceGeneralizedRdf`, and JCS `@json` canonicalization
 
 > Suite numbers from v0.42.0 use the spec-accurate `toEqual` comparison
 > (object-key order insignificant, array order significant); earlier numbers

tests/W3c/Algorithms/ToRdfTest.php

@@ -120,6 +120,10 @@ function normaliseNQuads(string $nquads): string
         static fn (string $line): string => remapNQuadsLine($line, static fn (string $label): string => $map[$label] ?? $label),
         $lines,
     );
+    // An RDF dataset is a SET of quads, so duplicate quads (e.g. the same value
+    // reached through two @index keys, whose @index is dropped in RDF — #te036)
+    // are semantically irrelevant: compare datasets up to set membership.
+    $relabelled = array_values(array_unique($relabelled));
     sort($relabelled, SORT_STRING);
 
     return implode("\n", $relabelled);
@@ -241,10 +245,13 @@ function nQuadsIsomorphic(array $a, array $b): bool
  */
 function nQuadsLines(string $nquads): array
 {
-    return array_values(array_filter(
+    // Deduplicate: a dataset is a set, so exact-duplicate quads do not affect
+    // isomorphism (the count-based prune in nQuadsIsomorphic must see set
+    // cardinality, not line multiplicity).
+    return array_values(array_unique(array_filter(
         array_map('trim', explode("\n", $nquads)),
         static fn (string $l): bool => $l !== '',
-    ));
+    )));
 }
 
 it('serialises to RDF per W3C manifest', function (TestCase $test) {

tests/W3c/README.md

@@ -50,9 +50,9 @@ composer test:all
 ## Current score
 
 ```
-Expansion:    378 passed /   7 failed (v0.68.0)
-Compaction:   246 passed /   0 failed (v0.68.0)  ← 100%
-toRdf:        459 passed /   8 failed (v0.68.0)
+Expansion:    378 passed /   7 failed (v0.69.0)
+Compaction:   246 passed /   0 failed (v0.69.0)  ← 100%
+toRdf:        460 passed /   7 failed (v0.69.0)  ← remaining 7 are blockers
 ```
 
 > v0.42.0 corrected the expand/compact comparison from `toEqualCanonicalizing`
@@ -137,6 +137,7 @@ Each Phase 4 PR:
 | v0.66.0 |          378  |    +0  | toRdf: reject double-fragment (non-well-formed) IRIs (+2 toRdf)|
 | v0.67.0 |          378  |    +0  | toRdf: empty node → blank node; @id-vanished node dropped (+2 toRdf)|
 | v0.68.0 |          378  |    +0  | toRdf: JSON Canonicalization Scheme (ECMAScript numbers) for @json (+1 toRdf)|
+| v0.69.0 |          378  |    +0  | toRdf harness: compare RDF datasets as sets (dedupe quads) (+1 toRdf — remaining 7 are blockers)|
 
 ### Notes on v0.4.0