Time-Domain Alerts from LSST & ZTF

The Large Synoptic Survey Telescope will deliver time-domain data through an alert stream.  I will describe the software pipelines that produce the alerts, the contents of the alert packets, and an envisioned architecture for alert distribution and simple filtering.  I will compare these systems to those being constructed for the Zwicky Transient Facility, which provides an opportunity to prototype brokers and other followup resources on an LSST-like stream beginning in 2018.