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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace LambdaTwelve\OneRecord\Rdf; |
| 6 | |
| 7 | /** |
| 8 | * A node in an RDF graph: an IRI, a blank node or a literal. |
| 9 | * |
| 10 | * ONE Record is RDF underneath its JSON-LD, and two documents are "the same" |
| 11 | * when their graphs are isomorphic, not when their JSON is equal. Everything |
| 12 | * that compares, diffs or patches logistics objects works on these terms. |
| 13 | */ |
| 14 | interface Term |
| 15 | { |
| 16 | /** |
| 17 | * A stable textual form used for sorting and hashing: N-Triples syntax. |
| 18 | */ |
| 19 | public function toNTriples(): string; |
| 20 | |
| 21 | public function equals(Term $other): bool; |
| 22 | } |