The document proposes an adaptive middleware approach for real-time RDF data analytics. It discusses how different RSP engines have different query languages, data models, execution strategies, and output models. It hypothesizes that an adaptive approach could improve efficiency and correctness by adapting to dynamic application requirements and data stream properties at runtime. It provides examples of events with different notification timing requirements to illustrate the need for the adaptive approach.

1. Matchmaker
Query
Handler
Input
Stream
Handler
Status
Monitor
RSP
Engine 1
Output
Result
Controller
Input
Stream
RSP
engine n
Application
Output ResultRequest
Output Rate
Status report
Input
sream
AdaptiveLayerRSPEngines
Negotiator
Context
Query
+Parameters
Register/ remove Query
Engine’s status
Output result
stream
Input rate
RSP
Engine 2
RSP
Engine 3
On the need for applications aware
adaptive middleware in real-time
RDF data analytics
Zia Ush Shamszaman, National University of Ireland Galway
This project has been funded by CISCO Galway and SFI
Motivation
• Different RSP Engines e.g. CQELS, C-
SPARQL, SPARQLstream, EPSPARQL,
ETALIS, SPARKWAVE differ on various
aspects,
• Query language
• Input data model
• Execution strategy
• Output data Model, and more.
• Performance of existing RSP engines are
affected by the different query sets and data
sets in different benchmarks.
Hypothesis
• An adaptive approach to RSP can
improve efficiency and correctness by
serving a broader category of application
requirements.
• The adaptive approach is capable to
a d a p t t o d y n a m i c a p p l i c a t i o n
requirements and properties of data
streams at run-time with improved
scalability.
Event 1: Unauthorized access in the house.
- This notification must be triggered immediately i.e. instantly when
the data arrives.
Event 2: Children activities
- their location and accompanied by whom at every 10 minutes
If there is an emergency then it shall be an instant notification.
Event 3: Emergency and disaster monitoring
- One notification per day if there is no emergency during the
emergency it has to be immediately after the incident it has to be
hourly for 2 next weeks.
Architecture of Adaptive RSPScenario