Cache control. Allows selectively disabling client-side caching (browser, proxy servers, network caching systems) and caching in the internal Platform Server cache.
&cache= * cacheControl *
&cache= * clientControl *, * serverControl *
If only one cacheControl value is specified, it is applied to both client and server caches.
Request attribute. Ignored when the request does not return a reply image. clientControl is ignored when client-side caching is disabled by the image catalog (if catalog::Expiration has a negative value).
Defaults to cache=on,on .