How do I specify URIs as metadata values in XHTML? I have the following well-formed and valid XHTML: <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:terms="http://purl.org/dc/terms/" xml:lang="en"> <head> <title>Hello, World!</title> <meta name='terms.creator' content='Eric Lease Morgan' /> <meta name='terms.title' content='Hello, World!' /> <meta name='terms.date' content='2024-03-28' /> <meta name='terms.abstract' content='Hello, World! It is nice to meet you.' /> <meta name='terms.subject' content='yellow' /> <meta name='terms.subject' content='red' /> <meta name='terms.subject' content='blue' /> </head> <body> <p>Hello, World!</p> </body> </html> To make the value of terms.creator more useful, I'd like specify a URI instead of a literal. For example, instead of denoting "Eric Lease Morgan", I'd like to specify "https://www.wikidata.org/wiki/Q102275801", but if I simply put the URI in the content attribute, then how will an RDF processor know the value is a URI? -- Eric Morgan <[log in to unmask]>