O&M 2.0 SWG


1.    Observations and Measurements v2 Standards Working Group


2.    Purpose of this Standards Working Group

The purpose of the O&M v2 SWG is to consider revisions to the OpenGIS® Observations and Measurements Implementation Standard..

A revision of O&M has been triggered by submission of OGC O&M to ISO/TC 211 as a proposed New Work Item. The submission was made under the liaison arrangement between ISO/TC 211 and OGC, and the Work Item has been assigned the number 19156. If the document submitted to ISO is approved as a Committee Draft, then an Editing Committee will be formed to process the document. It is expected that the ISO processes will result in changes to the standard, and an OGC SWG can provide a liaison with OGC, to ensure that the concerns and requirements identified by OCG members are attended to and that the final document is suitable as a revised OGC standard as well as an ISO standard. The SWG will ensure that the results of  harmonization efforts involving OGC WCS and SWE activities are introduced to the EC if appropriate.

This Standards Working Group will also evaluate and resolve submitted Change Request Proposals (CRPs) assigned to the O&M v2 SWG. The OGC SWG may propose intermediate revisions of O&M for publication through OGC only.

The SWG will ensure that all changes are consistent with the OGC standards baseline and business plan and ISO/TC 211 standards baseline.

3.    Scope of Work

As a New Work Item in ISO/TC 211 the management of the proposed standard is under the rules of ISO/TC 211. However, as a joint project between OGC and ISO/TC 211, OGC members are eligible to serve on a Joint Editing Committee together with those nominated directly by ISO/TC 211. Hence, the most direct way for OGC members to be involved in the progress of O&M is to nominate for the Joint Editing Committee. Nevertheless, there will be OGC members who choose not to join the ISO EC, so the O&M SWG will provide a means for them to maintain an interest in the progress and status of the work

The Scope of Work (SOW) of the O&M SWG will be to (a) monitor the progress of the ISO 19156 Editing Committee, review changes proposed to the standard, and respond to ISO/TC 211 in a timely manner (b) collect CRPs submitted by OGC members, evaluate each of these proposals, and dispose of them in a manner which is consistent with OGC processes respecting the liaison arrangement with ISO/TC 211. This shall be achieved by (i) referring the content of CRPs that are found to impact on core O&M to ISO 19156 EC for disposal, while (ii) CRPs that extend or profile core O&M may be considered independently by the O&M SWG.

The "core O&M " is defined by the scope statement in the O&M draft document submitted to ISO (see 3.2), and corresponds with the  elements in the UML packages in the model described in that document. The OGC O&M SWG shall provide timely feedback to ISO 19156 EC on issues raised by OGC members relating to the core O&M models.

The SWG may announce cut-off dates for the submission of CRPs that are to be addressed in accordance with the OGC TC Policy and Procedures. Additional CRPs submitted after the cut-off date may be addressed at the discretion of the SWG based on criticality of the change and available time and resources.

The deliverables of the SWG will be revisions of the standard for consideration by the membership for adoption.

The SWG may decide to address selected CRPs immediately in a corrigendum of the current standard.

3.1       What is out of scope?

Only those change requests submitted through the formal process either  (a) of ISO/TC 211, or (b) as identified in the OGC TC Policy and Procedures, will be addressed.  Any items suggested through emails, vocal discussions, etc. will be outside of the scope of this SWG until formally submitted.

3.2       Specific Contribution of Existing Work as a Starting Point

In support of the NWIP submission to ISO/TC 211, a revised draft of the O&M specification document was prepared using the ISO template with the content modified to conform to ISO expectations.  This is based on OGC O&M (07-022r1 and 07-002r3) and has been made available through the OGC portal as OGC document 08-141. This will form the baseline for the work of the SWG.

The primary changes relative to OGC O&M are (i) re-organization into the ISO template, (ii) consistent use of normative language, (iii) re-structuring of the presentation around the normative elements in the UML model, and (iv) re-packaging of the model and encoding to better support conformance testing. In most cases the changes to the document have no effect on the functional content of the standard, though a small number of changes to the model have been made in response to application experience.  The proposed normative changes are described in an Annex F of 08-141.

3.3       How it is to be Determined when the Work of the SWG has been Completed?

The SWG will remain active until the disbandment of the ISO 19156 EC, with the expectation that standard(s) issued as a result of the work of ISO 19156 EC be also issued as an OGC standard(s). Documents describing extensions to, or profiles of, the O&M standard may be submitted to the OGC TC for publication as separate standards.

The work on revision of O&M will be finished after the following milestones have been achieved:

1.       The SWG has completed the evaluation of all CRPs submitted prior to the cut-off date, and their referral to ISO/TC 211 for resolution, or resolution and incorporation into the candidate extensions or profiles of the standard within OGC.

2.       A revised version of O&M has been issued by ISO, and then provided for publication through OGC.

3.       Completion of a 30 day public comment period.

4.       Approval by the SWG membership of a recommendation to submit the document to the TC for consideration as a revision of the OpenGIS® Observations and Measurements Standard deprecating the current version.

5.       The revision of the standard has been approved by the OGC Technical and Planning Committees.

4.    Description of deliverables

The following deliverables will result from the work of this SWG:

1.       Candidates for the revision of the OpenGIS® Observations and Measurements Implementation Standard for submission to the TC. The primary document ("ISO/OGC O&M") is expected to be a major revision of the O&M standard that is identical to the result of the work of ISO 19156 EC. As part of the revision for OGC, re-classification of the standard as a Topic of the Abstract Specification might be recommended. The ISO standard may or may not include a normative XML implementation, though the OGC version is expected to. Additional standards that comprise extensions to, or profiles of, ISO/OGC O&M may also be produced.

2.       Corresponding XML schema documents associated with the revision for publication in the OGC schema repository.

3.       Release notes documenting the changes introduced in the revision.

The SWG will report the version(s) of O&M that the SWG is working on in its reports to the TC including the anticipated schedule.

Although all change requests will be addressed in each revision, some may be postponed due to the need to more quickly produce deliverables resolving higher priority requests.

5.    IPR Policy for this SWG

X RAND-Royalty Free.  ?  RAND for fee

6.    Anticipated Participants

The targeted participants of the O&M v2 SWG are (a) members of the ISO 19156 EC who are also OGC members (b) OGC members with an interest in Observation metadata, sampling of the natural environment, and sensor-web applications.


7.    Other informative information about the work of this SWG

a. Similar or applicable standards work (OGC and elsewhere).

An NSF funded project "Scientific Observations Network" (SONet), PI Mark Schildhauer (UCSB), has recently been established, with the goal of harmonizing various models for observations in environmental studies. The SWG will seek and if possible maintain liaison with this project, with the intention of generating CRPs for O&M to assist in alignment with the results of the SONet project, if applicable.

b. Details of the first meeting

The first meeting of the SWG will be held at 11am-1pm on Wednesday 3rd December in conjunction with the meeting of the Valencia OGC Technical Committee. Call-in information will be provided to the SWG's e-mail list and on the portal calendar in advance of the meeting. The primary business of the first meeting will be to arrange for a request for comments to OGC members, to complement the ISO 19156 EC process.

c. Projected on-going meeting schedule

The work of the SWG will be carried out primarily by email and conference calls. The SWG will commence regular work when the ISO 19156 EC has been formed and its schedule announced. The volume of meetings will be determined by the number of changes proposed by ISO 19156 EC and through CRPs submitted through OGC. There will be face-to-face meetings SWG in conjunction with OGC TC meetings when needed.  

d. Supporters of the Proposal

The following people support this proposal and are committed to the Charter and projected meeting schedule. These members are known as SWG Founding or Charter members. Once the SWG is officially activated, this group is immediately "opted-into" the SWG and have voting rights from the first day the SWG is officially formed.



Simon Cox


Andrew Woolf

e-Science Centre, Rutherford Appleton Laboratory

Ingo Simonis

International Geospatial Services Institute

Luis Bermudez

Southeastern Universities Research Association

Alexandre Robin

Spot Image

Stefano Nativi




Mike Botts


Phillip Dibner

Ecosystem Associates

Gerry Creager



e. Convener(s)

Simon Cox, CSIRO Exploration and Mining.