[Type] An unsigned integer [Description] Indicates that the document is willing to use content whose age is no greater than the specified time in seconds (cf. 'max-age' in HTTP 1.1 [RFC2616]). The document is not willing to use stale content, unless maxstale is also provided. [Required] No [Default Value] None [Name] 
maxage
m o d e
w e i g h t
f e t c h h i n t
f e t c h t i m e o u t
m a x a g e
m a x s t a l e