| http://www.w3.org/ns/prov#value | - ??? Speech can be created from existing sources, such as RS-232 and network feeds to scrolling LED digital signage??? Informational alerts can be pre-programmed to start with the push of a button or launched remotely by automated systems.??? Moving vehicles can offer dynamic announcement information transmitted by radio, from stored data, or updated locally by the drivers.??? Multi-lingual announc
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