1. A computer-implemented method of dynamically generating graphical user analysis interfaces, the method comprising: at an analytics engine configured to analyze a set of semantic items based on data models and processing models: receiving a first indication that first client data is available for use by the analytics engine, wherein the analytics engine is configured to analyze the first client data using the set of semantic items; subsequent to receiving the first indication: identifying a first subset of semantic items that are supported by the first client data; and identifying a second subset of semantic items that are unsupported by the first client data; sending first graphical user interface (GUI) data to a client instance, wherein the first GUI data identifies the first subset of semantic items and excludes the second subset of semantic items; receiving a second indication that second client data that supports the second subset of semantic items is available for use by the analytics engine; and subsequent to receiving the second indication, sending second GUI data to the client instance, wherein the second GUI data identifies the second subset of semantic items.