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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Bug: @type array causes TypeError in JSON-LD parsing","articleBody":"## Description\n\nWhen JSON-LD uses an array for `@type` (which is valid per the JSON-LD spec), solid-shim throws a TypeError because it assumes `@type` is always a string.\n\n## Error\n\n```\nTypeError: i.@type.replace is not a function\n```\n\n## Reproduction\n\nUse any JSON-LD with an array type:\n\n```json\n{\n  \"@context\": [\"https://www.w3.org/2018/credentials/v1\"],\n  \"@type\": [\"VerifiableCredential\", \"UniversityDegreeCredential\"],\n  ...\n}\n```\n\n## Root Cause\n\nIn `src/index.ts` line 45:\n\n```typescript\nif (node['@type']) {\n  const typeUri = node['@type'].replace('schema:', 'http://schema.org/')\n  targetStore.add(subject, $rdf.sym(RDF_TYPE), $rdf.sym(typeUri))\n}\n```\n\nThis assumes `@type` is a string, but JSON-LD allows arrays.\n\n## Suggested Fix\n\n```typescript\nif (node['@type']) {\n  const types = Array.isArray(node['@type']) ? node['@type'] : [node['@type']]\n  types.forEach(t =\u003e {\n    const typeUri = t.replace('schema:', 'http://schema.org/')\n    targetStore.add(subject, $rdf.sym(RDF_TYPE), $rdf.sym(typeUri))\n  })\n}\n```\n\nThis handles both string and array `@type` values correctly.\n\n## Context\n\nDiscovered while building a W3C Verifiable Credentials demo for jsonos. VCs commonly use type arrays like `[\"VerifiableCredential\", \"UniversityDegreeCredential\"]`.","author":{"url":"https://github.com/melvincarvalho","@type":"Person","name":"melvincarvalho"},"datePublished":"2026-01-06T21:33:43.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/1/solid-shim/issues/1"}