Character entity references can also have the format &name; where name is a case-sensitive alphanumeric string. For example, Î» can also be encoded as &lambda; in an HTML document. The character entity references &lt; , &gt; , &quot; and &amp; are predefined in HTML and SGML, because, ,  and & are already used to delimit markup. This notably does not include XML's &apos; (') entity.
Lack of facial expression. Lack of facial expression: Introduction. An absence of expression on the face is medically called flat affect. In many cases, the face mirrors the underlying emotions, and the person has limited emotions or various emotional or psychological disorders.
Dr Thierry Michaud, dermatologist and member of the YSLâ¯Skin Science team, said: âMany women I treat accept their wrinkles and fine lines but what they cannot accept is their new facial expressions. âInappropriate expressions are due to a loss of facial volumes: sagging skin, less defined contours, creased neck.