1. A method for displaying content items from a conditional playlist, comprising the steps of: receiving at a digital signage deployment a global conditional playlist having multiple content items and an abstract selection condition associated with each of multiple content items; resolving by the deployment, using local context data, the global conditional playlist to a local conditional playlist having the multiple content items and a measurable selection condition associated with each of the multiple content items; collecting by the deployment local observational data; selecting by the deployment a selected content item from the local conditional playlist based on conformance of the local observational data with the measurable selection condition associated with the selected content item; and displaying by the deployment the selected content item.