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OASIS TC Charter Proposal: SCA-C

OASIS Open CSA Member Section: SCA-C TC Charter Proposal

Subject:  Proposed Charter for OASIS Service Component Architecture for C and C++ (SCA-C)
          Technical Committee - 6 of 6
From:     "Mary McRae" <>
To:       <>,
Date:     Mon, 2 Jul 2007 09:35:45 -0400

To OASIS Members:

A draft TC charter has been submitted to establish the OASIS Service Component Architecture for C and C++ (SCA-C) Technical Committee. In accordance with the OASIS TC Process Policy section 2.2: ( the proposed charter is hereby submitted for comment. The comment period shall remain open until 11:45 pm ET on 16 July 2007.

OASIS maintains a mailing list for the purpose of submitting comments on proposed charters. Any OASIS member may post to this list by sending email to: All messages will be publicly archived at: Members who wish to receive emails must join the group by selecting "join group" on the group home page: Employees of organizational members do not require primary representative approval to subscribe to the oasis-charter-discuss e-mail.

A telephone conference will be held among the Convenor, the OASIS TC Administrator, and those proposers who wish to attend within four days of the close of the comment period. The announcement and call-in information will be noted on the OASIS Charter Discuss Group Calendar.

We encourage member comment and ask that you note the name of the proposed TC(SCA-C) in the subject line of your email message.



Mary P McRae
Manager of TC Administration, OASIS
phone: 603.232.9090

Normative Information

Name and Abbreviation

OASIS Service Component Architecture for C and C++ (SCA-C) Technical Committee (TC)

Member Section Affiliation

Open CSA Member Section


The purpose of the OASIS SCA-C Technical Committee (TC) is to develop specifications that standardize the use of C and C++ technologies within an SCA domain. This TC is part of the Open-CSA member section and its work must be coordinated with the work of the other TCs in the member section.

The TC will define:

  • A C++-based programming model for creating SCA component implementations
  • A C-based programming model for creating SCA component implementations
  • XSD schema that define extensions to the SCA Assembly Model [1] for C and C++ interfaces and implementations
  • APIs and annotations that facilitate the declaration and use of SCA construct from C and C++.

The work of this committee will be based the following specifications, submitted to the TC as a reference:

  • SCA Client and Implementation Model Specification for C++ [2]
  • SCA Client and Implementation Model Specification for C Draft [3]


The scope of this TC includes work to define any of the following:

  • C and C++ APIs and annotations for declaring, using or configuring any construct defined by a specification within the Open-CSA member section
  • C and C++ APIs for accessing and manipulating data that is associated the runtime context of an SCA component or client
  • C and C++ APIs for initiating and shutting down a runtime that can host SCA components or clients
  • C and C++ APIs associated with the deployment of SCA components (including composites)
  • Packaging formats for SCA constructs that may be deployed to C and C++ based runtimes

Upwards Compatibility

There are no formal requirements for upwards compatibility from the input documents to this TC. This is to ensure that the TC has maximum freedom of action in defining the OASIS standard. However it is recognized that there will be early implementations in the marketplace based upon these input documents and careful consideration must be applied to any change of feature/function that would cause incompatibilities in the OASIS standard at:

  • Source Code level
  • Compiled Object Code
  • XML data definitions

At minimum, known enhancements to the input documents that will cause compatibility issues with early implementations in the marketplace will be specified in a chapter in the specification offering migration guidance.


In line with the OASIS TC process, the TC will produce normative conformance information describing the normative characteristics of the specification and specific statements about what an implementation must do to conform to the specification, and what aspects are optional (if any).

Test Suite

The TC will produce a test suite for each specification which can be used to test conformance to the specification which will include:

1. A series of valid and invalid test cases which cover as much as is practical of the conformance statements of the specifications produced by this TC, with a description of each of the artifacts involved, constraints on the environment, the test case characteristics and their expected behavior. The artifacts should include example C and C++ implementations used to drive the test cases.

2. With the exception of necessary C and C++ implementation test artifacts, the provided artifacts should be independent of implementation language and binding type, and show clear mappings which allow the provision of suitable concrete implementations and concrete binding type, with any required policies. The artifacts may include SCA composites expressed in XML, WSDL interface files, and XSD files, along with other similar files that express the required characteristics of the environment for each test.

3. Example bindings may form part of the test suite, and are only provided as working samples which can be replaced by other specific bindings.

The Test Suites shall be packaged separately from the specifications produced by the TC and will contain a set of materials including but not limited to SCA composite and related SCA files, C and C++ files, WSDL files, XSD files.

The TC shall develop the test suites in collaboration with other TCs within the Open-CSA Member Section.

The following material should be considered as best practice for the preparation of conformance and test suite materials:

From OASIS: material on specification conformance statements:

From the W3C, material on specification variability, test metadata and specification clarity:


The TC has the following set of deliverables:

  • A revised SCA Client and Implementation Model Specification for C++ , together with a complete set of conformance statements
  • A revised SCA Client and Implementation Model Specification for C, together with a complete set of conformance statements
  • A complete Test Suite specification for the SCA C++ Specification including documents and the related materials described in the scope section
  • A complete Test Suite specification for the SCA C Specification including documents and the related materials described in the scope section

These specifications will reflect refinements, corrections or material technological improvements with respect to the input documents and in accordance with this charter. Ratification of the above specifications as OASIS Standards, including a brief period to address any errata, will mark the end of the TC's lifecycle. The TC may choose to vary the number of the specification documents and their titles.

Exit Criteria

The TC shall define concrete exit criteria that include at least two independent offerings that implement and are compliant with the all normative portions of specifications and demonstrate interoperability and portability as appropriate. Note that these are minimums and that the TC is free to set more stringent criteria.


Once the TC has completed work on a deliverable and it has become an OASIS standard, the TC will enter "maintenance mode" for the deliverable.

The purpose of maintenance mode is to provide minor revisions to previously adopted deliverables to clarify ambiguities, inconsistencies and obvious errors. Maintenance mode is not intended to enhance a deliverable or extend its functionality.

The TC will collect issues raised against the deliverables and periodically process those issues. Issues that request or require new or enhanced functionality shall be marked as enhancement requests and set aside. Issues that result in the clarification or correction of the deliverables shall be processed. The TC shall maintain a list of these adopted clarifications and shall periodically create a new minor revision of the deliverables including these updates. Periodically, but at least once a year, the TC shall produce and vote upon a new minor revision of the deliverables.

IPR Mode

This TC will operate under the "RF (Royalty Free) on RAND Terms" IPR mode as defined in the OASIS Intellectual Property Rights (IPR) Policy, effective 15 April 2005.

Anticipated Audience

The anticipated audience for this work includes:

  • Vendors offering C or C++ based SCA runtimes
  • Other specification authors that need C or C++ APIs and annotations for SCA constructs
  • Software architects and programmers, who design, write or integrate SCA applications


TC business will be conducted in English.

Non-normative Information Regarding the Startup of the TC

Related and Similar Work

The SCA specifications are intended to encompass a range of technologies which are useful in implementing service-oriented solutions. These include the range of Web- services related specifications such as WSDL and SOAP, the various WS-Security specifications, WS-Addressing, WS-Notification. The list is extensive and there is no limit to the relevance of these specifications to SCA. SCA does not intend to replace these specifications, but to build upon them.

Other existing technologies such as Java Enterprise Edition and CORBA also have a relationship to SCA and SCA anticipates optionally using these in relevant parts of the specifications (e.g., to define specific implementation types for artifacts such as JEE EJBs).

Proposed Date, Time, and Location of First TC Meeting

Date: Sept 6, 2007
Time: 11:00 EDT
Duration: 1 hour
Mode: Teleconference
Telephone: Dial-in TBC, along with e-Meeting facilities
Sponsor: IBM

Date: Sept 18, 2007
Time: 09:00 EDT
Duration: 3 days (in parallel with F2F meetings of other
TCs affiliated with this member section)
Mode: F2F meeting in East-Coast USA location (location TBC)
Telephone: Dial-in TBC, along with e-Meeting facilities
Sponsor: IBM

Ongoing Schedule

Weekly 60 Minute teleconferences sponsored by TBC. Time TBC by the TC.

It is anticipated that the committee will meet face-to-face once every quarter at a date and venue to be decided by the TC, but with a commitment to hold meetings in different regions of the world so as to share the effort of travel.


The following eligible individuals are in support of this proposal:


Bryan Aupperle, IBM,

Name of Member Section to Which This TC is Affiliated

Open CSA member section

Anticipated Contributions

It is expected that the existing SCA for C++ Version 1.00 as published in March 2007 will be a contribution from the Open SOA Collaboration (see [2]), together with the eventual final version of the existing draft SCA for C specification [3], along with references to the other SCA Version 1.00 specifications (see [2]), plus any work performed by the Open SOA collaboration between March 2007 and the start of the work of the SCA-C TC.

Draft FAQ Document

Intentionally left empty.

Proposed Working Title

Service Component Architecture Assembly Specification
SCA Client & Implementation Specification for C
SCA Client & Implementation Specification for C++ **

** 'Proposed Working Title' for the SCA-C TC has been corrected vis-à-vis the published TC Proposed Charter; see the posting from Graham Barber (Steering Committee Member for the OASIS Open CSA Member Section): "Section 2i [Proposed working title] will be corrected to list the following: "SCA Client & Implementation Specification for C" [and] "SCA Client & Implementation Specification for C++".


[1] Service Component Architecture Assembly Specification Version 1.0

[2] Service Component Architecture Client and Implementation Model Specification for C++

[3] Service Component Architecture Client and Implementation Model Specification for C


Prepared by Robin Cover for The XML Cover Pages archive. News story: "Six Technical Committees Proposed for the OASIS Open CSA Member Section." See also the 2007-03-21 news story: "Open SOA Collaboration Vendors Advance SCA and SDO Specs for Standardization." The OSOA Collaboration represented by eighteen leading technology vendors announced that key Service Component Architecture (SCA) and Service Data Objects (SDO) Final Specifications have completed incubation and will be submitted to OASIS and the Java Community Process (JCP) for standardization. SCA provides an executable model for composition of individual service components into a service network. SDO supports format-independent handling of business data.

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