A Web Registry for Publishing and Discovering Mathematical Services Rebhi Baraka Research Institute for Symbolic Computation.

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Presentation transcript:

A Web Registry for Publishing and Discovering Mathematical Services Rebhi Baraka Research Institute for Symbolic Computation (RISC-Linz) Johannes Kepler University, Austria Coauthors: Wolfgang Schreiner Olga Caprotti

Outline Key Idea. What is a Mathematical Web Service? A Mathematical Service Description Model. The MathBroker Registry Publishing and Querying Service Descriptions. Achievments and Goals.

Key Idea Use and extend existing Web technologies to offer mathematical problem solutions on the Web as Web services. Use a Web registry to broker these services (between developer and user) : Describe them using a mathematical description language (devised for this purpose). Advertise them in the Web by publishing their descriptions in a Web registry. User discovers them by browsing and searching the registry. User accesses them from their locations.

What is a Mathematical Web Service? A Web service is a problem solution that can be described, published, located, and invoked over the Web. A mathematical Web service is a Web service that offers the solution to a mathematical problem. MathBroker Sample Services:

Machine TypeService (WSDL) Realization Implementation Algorithm Problem optional is based on is located on is bound to service port is located on solves is special version of implements A Model for Mathematical Service Description

Implemented as a highly structured language (MSDL). MSDL allows the sharing of descriptions among entities. Provides for reusable library of descriptions. A Web registry is used to publish and discover descriptions in MSDL. MSDL:

The MathBroker Registry A web-based shared resource that enables publishing, and discovery of Web services. Examples: UDDI and ebXML registry standards. A (mathematical) registry provides a set of functionalities to facilitate the sharing and exchange of (mathematical) service descriptions. Based on OASIS ebXML registry standard. Extends ebXML Registry Reference Implementation (ebXMLrr). Registry service. Registry client. Particularly, we extended the information model.

ProblemAlgorithm ImplementationRealizationMachine MathbrokerObject ExtrinsicObject RegistryObject ebXML objects Mathbroker objects IsSpecVersOf SolvesImplementsIsBasedOnRunsOn Inheretance: Association: Extending the ebXML Registry

The MathBroker Registry Handles mathematical service descriptions in the form of MSDL. MSDL entities can be manipulated, registered, associated, classified, and discovered via the registry. Mathematical taxonomies, e.g., GAMS are imported into the registry. Mathematical entities can be classified. Easier search/browse capabilities. GAMS (Guide to Available Mathematical Software)

Publishing and Querying Service Descriptions Publishing Client side Establishes a connection with the registry, Gets authenticated, and Submits an MSDL description. Server side Registry life cycle manager invokes the proper components to: Extract individual entities and creates registry object for each. Makes the required classification(s), and associations. Saves each entity description as a repository item.

Publishing and Querying Service Descriptions Querying A client establishes a connection with the registry. Submits a query: by name, by ID. or by classification. The registry query manager invokes the proper component to perform the query and return the resulting entities. Registry:

MathBroker Objects in the Registry Browser

Mathematical Services Query Language (MSQL) Design and implement an expressive query language MSQL. Example: Find all algorithms in GAMS that solve problem myP and have deterministc polynomial time complexity. select every algorithm from /urn:uuid:56e d2f-43c8-925a-ec6341b29dcc where "myP")] and = "P"] return algorithm

Achievements Import mathematical taxonomies into the registry, e.g., GAMS Mathematical entities can be classified. Easier search/browse capabilities. MSDL entities can be manipulated, registered, and discovered via the registry. Dependencies among MSDL objects are modeled as Associations. A client to publish and query MSDL descriptions. An ebXML-based MSDL registry API. A Mathematical Services Query Language (MSQL). Goal: Extend MSQL to handle semantic content of registered MSDL descriptions.

Thank You. /research/parallel/projects/mathbroker2 MathBroker Project: