Semantic Services

Semantic Web - update from Tim bernes Lee

2008-02-27T13:34:00.000-08:00

Sir Tim Berners-Lee: Semantic Web is open for business by ZDNet's Paul Miller -- Web inventor Sir Tim Berners-Lee says that Semantic Web building blocks are in place. He also questions the attitude to data ownership of social networking companies in an interview recorded earlier this month.

My life in Map

2007-12-11T15:25:00.001-08:00

My life in map - google way ..

Link

AI based movie

2007-10-12T14:10:00.001-07:00

Movie generation portal from your not so fancy pictures..amazing.. can they use more semantics of the pictures to be more fanciful ?

Semantic wiki - wiki with difference

2007-01-27T23:31:00.000-08:00

While surfing through net [ with the help google] to understand the usage of semantics in collaboration world - buzzword for Web 2.0, I found a relatively new concept called semantic wiki. Semantic wiki is more than wiki where user not just add wiki content also add more additional information to wiki content. Check out yourself from http://3ba.se/screencast/. Even if the UI is not so appealing to me but it clearly indicates how semantics can play a significant role with Web 2.0 in oline collaboration and knowledge sharing.

Semantic acquisition

2006-11-30T00:15:00.000-08:00

Major SOA/BPM vendor WebMethods acquired Cerebra -- semantic metadata management company.

See the press release :

http://webmethods.com/About/News/PressReleases/Details?pressReleaseDetails_param0=6937

Is this recognition of semantic technologies in mainstream SOA/BPM world ? It will be interesting to watch how they fit semantics in their product offereings.

Semantic Technology - new way or better way ?

2006-11-13T20:27:00.000-08:00

Watch out this interview - http://seminars.ijs.si/iswc2006/video.asp?video_id=1826

Good to know that Einstein's best working tool was - "Circular File" [ Wastebasket].

I acknowledge his idea that semantic technologies are not first which solving the problem of data definition, integration etc. but just another clearer or better way of doing it.

International Semantic Web Conference

2006-11-05T15:57:00.000-08:00

I am keeping a very close eye on 5th international semantic web conference at Athens , GA [http://iswc2006.semanticweb.org/].

I am specially interested to know how industry is encouraging and embracing the semantic technologies, which is till now confined in the research laboratories and lecture halls, to provide more real business solutions.

SAWSDL Reaches Last Call for Comments

2006-10-31T13:42:00.000-08:00

The Semantic Annotations for WSDL WG has promoted the SAWSDL specification to "Last Call for Comments".

Specification :- http://www.w3.org/TR/2006/WD-sawsdl-20060928/
Usage Guide :- http://www.w3.org/TR/2006/WD-sawsdl-guide-20060928/

Semantic Discovery and BPEL

2006-10-31T12:03:00.000-08:00

BPEL is leading standard, co-authored by Oracle, IBM, Microsoft, BEA, SAP et all , for business process language to orchestrate Web services.It enables manual composition of services to create complex business process flow. But it lacks semantic expressiveness, which limits the automatic discovery, composition and customization of partner services required to address the growing need for highly dynamic IT environment. Also it is still far from fulfilling the SOA promise of “really” loosely coupled systems.

Semantic discovery can provide the missing functionalities with the help of semantic web and inference technologies. Semantic Web technologies will enable description of services in computer interpretable format and that will make it possible to perform automatic selection, composition and customization of services.

For a real implementation of a semantic discovery service, please refer to ksl.Stanford.edu/sds

Semantic Integration - integration of data semantics

2006-10-29T11:05:00.000-08:00

Visionaries [really farsighted] envision semantic integration as next step of SOA and application integration. EAI/SOA provides integration of technologies, but semantic integration provides integration of data and service behaviors or functionalities.

(Stretched) goal of Semantic Integration is to enable:

- automated service discovery
- automated service composition
- resilient or adaptive system
- automated service customization …etc.

Before we dive into the ways to achive these goals through usage of semantics in enterprise integration, let's look into the meaning of semantics [ sply. semantics of service ].

- Data Semantics: Formal definition of data in input and output messages of a web service which can be used for discovery and interoperability
- Functional Semantics: Formally representing capabilities of a web service which help to automatic discovery and composition
- Execution Semantics: Formally representing the execution or flow of services in a process or operations in a service to enable verification, simulation and exception handling
- QoS based Semantics: Formally describing operational metrics of a web service/process: cost, time, reliability etc. which is used for service optimization or to finding most suitable webservice for given SLA]

Three step process for moving from normal service to semantically enabled service - Semantic registration of services, which allows semantic discovery and composition to higher-level semantic service.

For semantic registration of services, there should be a way to capture semantic information of the service input/output, operations, functionality and QoS. Mainly two separate approaches are considered; by WSDL annotation or keeping separate metadata like WS-Policy etc.

Semantic discovery means selecting services from any specialized registry based on the functional requirements using semantic information of the operation and similarity based on input/output semantics of candidate services using information about the message parts.

And last but not least, semantic composition helps to achieve the most important goal of SOA based systems: reducing the complexity of creating composite services by choosing the optimal combination among possible options.