Canonical vs og:url Duplication Note
Bounded HTML feature/convention note; no full document audit or live browser compatibility determination.
Description
Canonical vs og:url Duplication Note: look up a supported built-in reference entry.
A canonical URL hint and a social object's URL serve different consumers. Agreement between them can be intentional without making them interchangeable.
This tool returns a built-in reference entry for an exact supported selector. The supported entries and their scope are part of the tool; no website or current external table is queried.
When to use this tool
Use this tool when the supplied inputs match the specific operation described above and you need a repeatable result under its stated convention.
- Check the supported input and output contract against an existing calculation or observation.
- Use the complete example to confirm units, selector spelling and result interpretation.
How to use the tool and how it works
- Enter every field in the input table using the stated units and the exact supported selector spelling where applicable.
- Run the tool. Correct input errors before interpreting an output.
- Read the result fields below; use accompanying flags and the stated sign, boundary or model convention when interpreting a number.
Accept metadata and return the built-in canonical-versus-og:url note.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| topic | Topic. | Exact value: "metadata" |
| topic | Built-in entry |
|---|---|
| "metadata" | rel=canonical suggests preferred indexing URL, og:url identifies a social object; they are not interchangeable and can intentionally agree. |
| Output field | Interpretation |
|---|---|
| result | Object containing the following named result fields. |
| result.reference | The stored entry for the exact selected key; its type may be text, a number or a list. |
{
"input": {
"topic": "metadata"
},
"output": {
"result": {
"reference": "rel=canonical suggests preferred indexing URL, og:url identifies a social object; they are not interchangeable and can intentionally agree."
}
}
}Limitations and assumptions
- The tool does not crawl pages, choose canonical URLs or verify indexing and social-preview behavior.
- Every declared field is required and unexpected fields are rejected. Numeric inputs must be finite; input errors are distinct from a valid false result or an explicitly qualified output.
- Extremely large inputs and nonfinite or excessively large outputs are rejected. List positions reported by the tool use zero-based indices unless stated otherwise.
Alternative or Complementary methods
Check the underlying observations, units and conventions independently before using the result in a larger workflow. The tools listed below address nearby tasks; compare their inputs and scope before substituting one for this operation.
References
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