JSON-LD
JSON-LD is the recommended format for structured data: a standalone script block in the page, machine-readable without touching the visible HTML. It describes entities and their relationships using the schema.org vocabulary.
In practice
Its decisive advantage over microdata: separation. The markup lives in its own block, is generated by template, validated automatically — no interleaving of tags into visible content. Our pages assemble a complete graph: the article references the organization, which references its logo, address, and subsidiaries.