<WS-PubSub> množina omezení týkající se charakteru a objemu dat, která jsou požadována

POZNÁMKA 1 k heslu Filtr je specifikován na základě požadavku nebo zprávy subskripce.

a set of constraints on the nature and volume of data to be returned in the Delivery. A Filter is specified on a Request or a Subscription message. Filters may include both a Topic Expression of content related terms, for example the STOP POINT, JOURNEY or Temporal span, and also a Subscription Policy, containing terms regulating the processing of the subscription, for example the Volume, indicating how many entries should be returned