Field note 03
Structured Data as a Data Source
Machine-readable metadata can describe a page beyond its visible heading and body text.
Use clear identifiers
Distinct values for name, description and identifier help show which property a parser selected. The values should remain ordinary text and should not require active content.
Compare with visible content
Structured data may agree with the page title or intentionally differ for a controlled comparison. Documenting both sources makes the resulting interpretation easier to explain.
Validate the document
Small valid JSON-LD documents are a better baseline than large examples copied from production sites. Malformed variants should be bounded and quick to reject.