IVOA

CEA Implementation: The Astrogrid Implentation of the Common Execution Architecture
Version 1.0

IVOA Working Draft 11 December, 2006

This version:
http://www.ivoa.net/Documents/WD/GWS/CEAInterface-XXXX.html
Latest version:
http://www.ivoa.net/Documents/latest/CEAInterface.html
Previous versions
Authors:
Paul Harrison, Editor
and the IVOA Grid and Web Services Working Group.

Abstract

This document describes the astrogrid implemenation of the Common Execution Architecture (CEA). In particular a implementation of a Commandline Common Execution Controller is described which allows legacy commandline applications to be presented as IVOA Standard web services with a minimum of effort.

Status of this document

This is an IVOA Working Draft for review by IVOA members and other interested parties. It is a draft document and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use IVOA Working Drafts as reference materials or to cite them as other than "work in progress."

Parts that the editor considers should be removed from the document are marked in red with a strike through line, and parts to be expanded are in green

A list of current IVOA Recommendations and other technical documents can be found at http://www.ivoa.net/Documents/.

Acknowledgements

This document has been developed with support from the UK Particle Physics and Astronomy Research Council (PPARC), and from the Eurpean Commission's Sixth Framework Program via the Optical Infrared Coordination Network (OPTICON).

Conformance-related definitions

 The words "MUST", "SHALL", "SHOULD", "MAY", "RECOMMENDED", and "OPTIONAL" (in upper or lower case) used in this document are to be interpreted as described in IETF standard, RFC 2119 [RFC 2119].

The Virtual Observatory (VO) is general term for a collection of federated resources that can be used to conduct astronomical research, education, and outreach. The International Virtual Observatory Alliance (IVOA) is a global collaboration of separately funded projects to develop standards and infrastructure that enable VO applications.

Syntax Notation Using XML Schema

The eXtensible Markup Language, or XML, is document syntax for marking textual information with named tags and is defined by the World Wide Web Consortium (W3C) Recommendation, XML 1.0 [XML]. The set of XML tag names and the syntax rules for their use is referred to as the document schema. One way to formally define a schema for XML documents is using the W3C standard known as XML Schema [Schema].

This document defines the VOApplication schema using XML Schema. The full Schema document is listed in Appendix A. Parts of the schema appear within the main sections of this document; however, documentation nodes have been left out for the sake of brevity.

Reference to specific elements and types defined in the VOApplication schema include the namespaces prefix, va, as in va:Application (a type defined in the VOApplication schema). Use of the specific va prefix in compliant instance documents is not required (the namespace could be assigned to any prefix); its use in this document is simply to indicate that it is an entity defined in the VOApplication schema.

Contents

Introduction

 

The CEA Application Data Model

Changes since last version

Appendix A: The complete CEAImplementation Schema

Note that this schema can be found on-line at http://www.astrogrid.org/schema/CEAImplementation/v1.0rc1 (i.e. the target namespace can also be used as a URL for the schema.) This location should represent the definitive source, the schema is only copied below for completeness of this document.

The Complete CEAImplementation Schema

Appendix B: The complete CEAExecutionRecord Schema

Note that this schema can be found on-line at http://www.astrogrid.org/schema/CEAExecutionRecord/v1.0rc1 (i.e. the target namespace can also be used as a URL for the schema.) This location should represent the definitive source, the schema is only copied below for completeness of this document.

The Complete CEAImplementation Schema

Appendix B: An example CEC Configuration file.

The Complete CEAImplementation instance

Appendix d: Change History

This is the first version that has been made public - it is derived from wiki content.

References

[RFC 2119]
Bradner, S. 1997. Key words for use in RFCs to Indicate Requirement Levels, IETF RFC 2119, http://www.ietf.org/rfc/rfc2119.txt
[RM]
Hanisch, Robert (ed.) 2004. Resource Metadata for the Virtual Observatory, Version 1.01, IVOA Recommendation, http://www.ivoa.net/Documents/REC/ResMetadata/RM-20040426.htm
[VR]
Plante, Ray (ed.) 2006. VOResource: an XML Encoding Schema for Resource Metadata, IVOA Working Draft, http://www.ivoa.net/Documents/latest/VOResource.html
[VSTD]
Harrison, Paul. (ed.) 2006. VOStandard: an XML Encoding Schema for IVOA Standards, IVOA Working Draft, http://www.ivoa.net/Documents/latest/VOResource.html
[CEA]
Harrison, Paul. 2006. A Proposal for a Common Execution Architecture , IVOA Working Draft, http://www.ivoa.net/Documents/latest/CEA.html
 
[CEAAPP]
Harrison, Paul. 2006. CEA Application Model: A model and XML Encoding Schema for Applications in the Common Execution Architecture, IVOA Working Draft, http://www.ivoa.net/Documents/latest/CEAApplicationDM.html
[CEAINT]
Harrison, Paul. 2006. CEA Interface: How to Invoke Applications in the Common Execution Architecture, IVOA Working Draft, http://www.ivoa.net/Documents/latest/CEAInterface.html
 
[xml]
Bray, Tim, Paoli, Jean, Sperberg-McQueen, C. M., Maler, Eve, Yergeau, Francois (editors) 2004, Extensible Markup Language (XML) 1.0 (Third Edition), W3C 11-Dec-2006 10:14/TR/REC-xml
[schema]
Fallside, David C., Walmsley, Priscilla (editors) 2004, XML Schema Part 0: Primer Second Edition, W3C Recommendation 28 October 2004, http://www.w3.org/TR/xmlschema-0/
[ISO8601]
Wolf, Misha and Wicksteed, Charles 1997, Date and Time Format, http://www.w3.org/TR/NOTE-datetime.
[OAI]
Lagoze, Carl, Van de Sompel, Herbert, Nelson, Michael, and Warner, Simeon 2004, The Open Archives Initiative Protocol for Metadata Harvesting, http://www.openarchives.org/OAI/openarchivesprotocol.html.
[ID]
Plante, R., Linde, T., Williams, R., Noddle, K. 2005, IVOA Identifiers v1.1, http://www.ivoa.net/Documents/REC/Identifiers/Identifiers-200505XX.html.
[WSDL]
Christensen, E., Curbera, F., Meredith, G., Weerawarana, S. Web Services Description Language (WSDL) 1.1, W3C Note 15 March 2001, http://www.w3.org/TR/wsdl.
[SOAP]
Box, D., Ehnebuske, D., Kakivaya, G., Layman, A., Mendolsohn, N., Neilsen, H.F., Thatte, S., Winer, D. Simple Object Access Protocol (SOAP) 1.1, W3C Note 08 May 2000, http://www.w3.org/TR/2000/NOTE-SOAP-20000508/.
Last modified: 11-Dec-2006 10:14