Function extractCopyright

extractCopyright(input: DocumentInput): CopyrightMetadata
Extract copyright metadata from HTML.
Parameters
- input: DocumentInput
  Parsed HTML document or raw HTML string
Returns CopyrightMetadata
Copyright metadata
Remarks
Extracts copyright and licensing information from meta tags, link tags, and Schema.org structured data.
Example
```
// With parsed document (recommended for multiple extractions)
const doc = parseHTML(htmlString);
const copyright = extractCopyright(doc);

// Or directly with HTML string
const copyright = extractCopyright(htmlString);
```
- Defined in src/metadata/copyright/extract.ts:35