The systems and methods described herein use a tag for collecting data associated with a content object of a content page. The tag may be a universal tag which can provide a single point of data collection and thereby reduce the number of network requests due to piggyback tags. The data collected from the content page may be communicated to a stream management system which can process the data and split the data into multiple data streams to be fed to a downstream system. The downstream system can further process the data and communicate to another downstream system. In some embodiments, the stream management system can access the repositories of its downstream system and veto the data flows created by the downstream system.