Abstract: System and method for enabling proximity-based, temporally-limited broadcasting (one-to-many) and direct (one-to-one) hyperlocal messaging of semantically-aware content for both fixed and mobile internet-enabled, location-aware computing devices in which internet-enabled devices are able to send broadcasts or individually directed messages containing semantically aware content and where the messages are able to be received only by users of the same system within a certain proximate temporal and spatial area to the sending device. By means of assigning each content object a valid reception area and an associated time validity the platform enforces that the combination of the temporal and spatial area variables results in a hyperlocal messaging thus any particular content has the property that it can only be seen within a certain hyperlocal area. Furthermore each transmitted content object has a semantic categorisation.