State of the art tools for rdf stream processing

Hi, all:


In the GeoSmartCity project <http://www.geosmartcity.eu/> we aim at
developing a framework in which Geo Open Data can be exploited towards
Smart City paradigm. One of the scenarios planned forour pilots is
underground network management involving water and sewage networkmanagement
<https://www.w3.org/community/rsp/wiki/Use_cases#Water_Supply_and_Sewage_Network_Management>.
This includes GIS access to sensor data from Water management SCADAs and
use of GIS and sensed data to improve modeling and planning of water
networks.



We would like to explore an rdf streaming implementation in order to:

- be able to define continous and advanced queries.

- integrate sources, dynamic (weather) or static (type of sensors,
geospatial features, etc.).

- integrate with OGC standards frictionless.



Unfortunately the number of different query languages and discontinued
tools discourage a bit to follow in this direction.



I would like to ask you which tools that could accomplish this goal have
ongoing development and have some traction.



Thanks.



P.D. (Will all of these previous efforts will go to bin when RSP-QL become
the unique standard?)