Structured Data Coverage

Coverage is necessary and not sufficient. A property with a valid graph on every page has removed ambiguity, not earned attention.

Measures

Share of published pages emitting a valid schema graph, whether the type matches the page, and whether nodes cross-reference each other rather than sitting as isolated blobs.

Data Source

The property's own rendered output.

Indicates

Legibility. How much a system is told versus how much it has to infer.

What Moves It

One schema engine generating the graph for every page type, rather than per-template markup that drifts.

Does Not Prove

Ranking benefit or citation. Valid markup on worthless content is valid markup on worthless content.

Status

Measured directly and repeatable at any time.