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Subject: TOSCA Simple Profile in YAML V1.0 is approved by TOSCA TC

OASIS Members and other interested parties,

OASIS is pleased to announce the approval and publication of a new Committee Specification by the members of the OASIS Topology and Orchestration Specification for Cloud Applications (TOSCA) TC:

TOSCA Simple Profile in YAML Version 1.0
Committee Specification 01
12 June 2016

What is the TOSCA Simple Profile in YAML and why is it important? 

This Committee Specification aims to provide a more accessible syntax as well as a more concise and incremental expressiveness of the TOSCA DSL (Domain Specific Language). The intent is to minimize the learning curve and speed adoption for those using TOSCA to portably describe cloud applications.

YAML is a human friendly data serialization standard with a syntax much easier to read and edit than XML. The specification prescribes an isomorphic rendering of a subset of TOSCA to ensure that semantics are preserved and can be transformed from XML to YAML and from YAML to XML. 

This is a final deliverable. Completed and approved by the TC, this OASIS Committee Specification is fully ready for implementation. If submitted for further ratification as an OASIS Standard, its content will not change.

The prose specifications and related files are available here:

PDF (Authoritative):


Editable source: 

Distribution ZIP file

For your convenience, OASIS provides a complete package of the prose specification and related files in a ZIP distribution file. You can download the ZIP file here:


Members of the TOSCA TC [1] approved this specification by Special Majority Vote. The specification had been released for public review as required by the TC Process [2]. The vote to approve as a Committee Specification passed [3], and the document is now available online in the OASIS Library as referenced above.

Our congratulations to the TC on achieving this milestone and our thanks to the reviewers who provided feedback on the specification drafts to help improve the quality of the work.

========== Additional references:

[1] OASIS Topology and Orchestration Specification for Cloud Applications (TOSCA) TC

[2] Public reviews: 
- 30-day public review, 21 September 2015: https://lists.oasis-open.org/archives/members/201509/msg00004.html
  - Comment resolution log: http://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.0/csprd01/TOSCA-Simple-Profile-YAML-v1.0-csprd01-comment-resolution-log.xlsx

- 15-day public review, 11 March 2016: https://lists.oasis-open.org/archives/members/201603/msg00002.html
  - Comment resolution log: http://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.0/csprd02/TOSCA-Simple-Profile-YAML-v1.0-csprd02-comment-resolution-log.xlsx

[3] Approval ballot: 


Chet Ensign
Director of Standards Development and TC Administration 
OASIS: Advancing open standards for the information society

Primary: +1 973-996-2298
Mobile: +1 201-341-1393 

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