presenting an <a>RDF node</a>:</b>
						return <code>R</code>
					</li>
					<li>
						<b>If <code>R</code> is a <code>Number</code> and the function declares a <code>sh:returnType</code> <code>T</code>
						and the Number can be converted to a well-formed <a>literal</a> with datatype <code>T</code>:</b>
						return a <a>literal</a> with datatype <code>T</code> and the given value as lexical form
					</li>
					<li>
						<b>If <code>R</code> is a <code>Number</code> that can be converted to a well-fo