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Kphoenix#XP\  P6QXP# Report of April X3L8 Special Interest Gr This PCThis PC 2lvvrpDefault Paragraph FoDefault Paragraph Font Definition TermDefinition Term Definition ListDefinition List DefinitionDefinition 2H1H1C9#\  P6QP# #XP\  P6QXP#H2H2C9#y\  P6QP# #XP\  P6QXP#H3H3C9#^\  P6QP# #XP\  P6QXP#H4H4 2 H  | vl H5H5 C9#C\  P6QP# #XP\  P6QXP#H6H6 C9#6\  P6QP# #XP\  P6QXP#AddressAddress  BlockquoteBlockquote  2@ r  r@  CITECITE CODECODE11#d6X@DQ@##XP\  P6QXP#EmphasisEmphasis HyperlinkHyperlink  2r l,FollowedHyperlinkFollowedHyperlink  KeyboardKeyboard44#d6X@DQ@# #XP\  P6QXP#PreformattedPreformattedX` hp x (# ,Kk ##d6X@DQ@##XP\  P6QXP# ,Kk #X` hp x (#z-Bottom of Formz-Bottom of Form;1#;2PQP##XP\  P6QXP#2"rz-Top of Formz-Top of Form;1#;2PQP##XP\  P6QXP#SampleSample11#Xx6X@DQX@##XP\  P6QXP#StrongStrong  TypewriterTypewriter11#d6X@DQ@##XP\  P6QXP#2rpldVariableVariable HTML MarkupHTML Markup CommentComment Document MapDocument Map;1#XX2PQXP##XP\  P6QXP# S  Report of January X3L8 Special Interest Group Meeting  S   Meeting Notes X3L8 Special Interest Group Meeting Held at the National Institute of Standards and Technology January 23 & 24, 1997 Р Attendees: Brent Archinal, U.S. Naval Observatory Bruce Bargmeyer, U.S. Environmental Protection Agency Larry Fitzwater, U.S. Environmental Protection Agency Dan Gillman, Bureau of the Census Alan Goldfine, National Institute of Standards and Technology Paul Hawes, Bellcore Henry Heffernan, EDPNS Michael Huhns, University of South Carolina Charles Gross, Hughes Information Systems Bill Kenworthey, Self Hiam Kilov, IBM Tom Kurihara, National Institute of Standards and Technology Joe Leahy, Science Applications International Corporation Jerry Linn, National Institute of Standards and Technology Michael Lombardi, National Institute of Standards and Technology, Boulder Doug Mann, Pacific Northwest Laboratory Rudy Marik, Synetics Corporation Douglas Mann, Battelle John McCarthy, Lawrence Berkeley Laboratory Judith Newton, National Institute of Standards and Technology Phong Ngo, Science Applications International Corporation Peter D. Noerdlinger, Applied Research Corp. Frank Olken, Lawrence Berkeley Laboratory Burton Parker, Paladin Integration Engineering Joanne Petrie, Department of Transportation Tom Rhodes, National Institute of Standards and Technology Dan Gillman chaired the meeting except for Friday morning, during which Judith Newton chaired the meeting. The following reports the issues raised and decisions made: 1. Revision of time standards (X3.431986, X3.511986) Burt Parker, editor of the revised standard for representation of time for information interchange, led a discussion of the form and content for the revised standard. The results of the discussion posed the general form and specific content of the revised standard. The editor was instructed to prepare a draft of the revised standard reflecting the results of the discussion. A summary of the results follows: A. The structure of the revised standard shall be: The body of the standard: shall specify a single, unambiguous format for representation of a point in time for interchange. A normative annex: shall specify how the concatenation of time representation and the date representation of ANSI X3.30 is accomplished for those cases wherein interchange of time also requires interchange of date information. A normative annex: shall map the interchange representation for a point in time to the U.S. time zone code sets of ANSI X3.511986. An informative annex: shall contain examples and other explanatory matter. B. The format for representation of a point in time within a day for information interchange shall be in Coordinated Universal Time (UTC) compatible format (e.g., nondaylight savings time in 24 hour clock time format) as follows: HHMMSS.ssss(*, or +, or )hhmm Where HH represents hours (with legal values 0023) MM represents minutes (with legal values 0059) SS represents seconds (with legal values 0060) [Note: legal values are normally 0059, with value 60 reserved for representing leap seconds] ssss represents decimal seconds, with unlimited number of significant digits (*, or +, or ): "+" and "" represents positive or negative time differentials from UTC, respectively, and "*" represents all time differentials from UTC. [Note: the parenthesis symbols are NOT part of the representational format but are used to denote that actual representations of points in time will use ONE of the three symbols.] hhmm represents hours and minutes time differential from UTC, where hh and mm legal values are the same as for HH and MM, respectively And hhmm time differential representation is mandatory for all interchange representations except that for the "Universal Local Time" representation specified below. Four numeric characters are mandatory for hhmm time differential representations. HH, MM, SS, and ssss components may be truncated from right to left, i.e., ".ssss" may be dropped, "SS.ssss" may be dropped, or "MMSS.ssss" may be dropped. Leading zeros in each component of the complete time representation are mandatory, i.e., for HH, MM, SS, and ssss representational components. No spaces or other delimiters (besides the ".", "+", "", and "*" shown in the basic representation above) are permitted Specifically, representations of specific points in time shall be as follows: 1) The UTC representation of a point in time HHMMSS.ssss+0000 Where HH, MM, SS, and ssss have the same meanings as above +0000 represents 0 hours and 0 minutes offset from UTC Universal Local Time", (e.g., 1000AM in all time zones) 2) A specific local point in time in all time zones, i.e., "Universal Local Time", (e.g., 1000AM in all time zones) HHMMSS.ssss* Where HH, MM, SS, and ssss have the same meanings as above * represents all hour and minute time differential from UTC (i.e., all time zones) 3) A specific local point in time in a specific time zone HHMMSS.ssss(+or)hhmm Where HH, MM, SS, ssss, and (+or) have the same meanings as above hhmm represents the specific hours and minutes offset from UTC for the specific time zone (e.g., 0500 for Eastern Standard Time) à 2. Presentation of the X3L8 Metamodel for the Management of Sharable Data Paul Hawes gave a presentation about the metamodel to new participants and visitors at the meeting. He covered the major topics that the committee has covered in developing the metamodel. A lively discussion followed as people explored the utility of the metamodel for various uses. Several people from NIST are working on an object registry and are interested in what X3L8 has accomplished. à 3. Basic Semantic Repository We discussed the progress and status of the BSR effort. We had received a number of messages relating to management and project issues. Regina Girouard of DISA sent email to us about an upcoming ISO Technical Management Board meeting that will consider the BSR work. We discussed the recent changes in the management structure for the BSR and tried to identify the existing and potential sources of interest in the work that is being done. We are lacking some of the information that we need in order to understand the status of the effort and to determine how we can best focus our contributions. We are interested in seeing the BSR succeed as an implementation of SC14 standards. Some X3L8 members expressed potential interest in working with the BSR prototype development efforts and with efforts to register the content of x.12 messages, especially those used for environmental information. The material from the BSR project team " models, concepts, and BSUs are being examined to determine the potential for a closer cooperation in the BSR developments. The group provided comments to Regina for her use in responding to the messages that she forwarded to us. We will also continue discussions with Denis Hill and others involved in the effort. 4. Metamodel for the Management of Sharable Data Paul Hawes presented the latest version of the Metamodel for the Management of Sharable Data and the data dictionary for the metamodel, which he is preparing for final action. During the September and October SIG meetings, the group went through the metamodel issues list and determined resolutions to each open issue or deferred the issue until the next version of the metamodel. Unfortunately, Paul had not received a copy of the revised metamodel issues list and thus some additional work may need to be done. All interested persons are requested to review the latest revision of the metamodel that Paul passed out and to provide comments to Paul. He will work with the comments and the revised metamodel issues list to prepare the final version. Bruce Bargmeyer will reorganize the revised metamodel issues list and put it on the FTP site. 5. Revision of Name and Scope for SC 14 and related JTC1 reengineering issues In response to a Resolution 22 passed by JTC1 at their December meeting, Paul Hawes prepared a Statement of Rationale for the change of name and scope for SC 14, along with a suggested Work Plan, showing work to be dropped, completed or initiated as new projects. He pulled material together from many sources including a draft developed by Ronny Elofsson at the SC 14 Secretariat. Paul worked the material into a new draft that was very well received. His draft contained a very concise statement of the future work of SC 14. This statement was an edited version of the material developed during the last SC 14 plenary meeting. It was suggested that we send Ronny Elofsson, of the SC 14 secretariat, a message recommending that the revised language be used on the JTC1 ballot. It more clearly states, but does not change the intended new scope of SC14. Several comments were made on Paul's draft. Doug Mann will produce the next draft of this material. The next draft of the Rationale and Work Plan along with the reworded Scope statement will be circulated for comment via the SC14 news reflector and other means. Then a final draft will be produced. It was suggested that a cover letter be developed that can be sent with the material to call attention to the importance of the material and the issue that it addresses. There was also discussion of how to best to market the proposed new scope of SC14 during the ballot period. All persons interested in the outcome of the revision of the SC14 work and of the JTC1 reengineering effort are encouraged to exercise their contacts with other experts around the world. We discussed the possible melding of several pieces of JTC1 committees into a new group. Doug Mann suggested formation of a new grouping that would address the "semantic content" of data. He will write up a brief description of this for discussion at the next meeting. We may want to forward it for consideration of the JTC1 ad hoc reengeering committee. 6. ISO/IEC JTC1 approved conference on the Registration of Metadata Frank Olken and John McCarthy lead a discussion of the Call for Participation for this conference. The call is being sent out to many distribution lists. The URL for the call is: http://www.lbl.gov/~olken/EPA/Workshop/ This workshop was approved by JTC1 at its December, 1996 meeting. The workshop was recommended in a resolution from the JTC1 approved "Joint Workshop on Standards for the Use of Models that Define the Data and Processes of Information Systems", meeting held in Bellevue, Washington, USA in September 1996. SC 14 offered to hold the workshop with the sponsorship of the U.S. EPA. Frank Olken and John McCarthy of the Lawrence Berkeley National Laboratory have organized the conference and are Program Committee Chair and General Chair, respectively. They have developed a Program Committee, additional sponsorship and have developed a call for participation. We discussed the workshop content. To be sure that we had adequately addressed the issues in the JTC1 resolution the call for participation, tracks the various items in the resolution to items in the call. We believe that the JTC1 resolution is well covered and some additional topics have been added. An important part of the conference is the intention to bring new perspectives to bear on the metadata registration work of X3L8 and SC14. We would like speakers and workgroup participants from a variety of perspectives to address metadata registration with the insights that come from their perspective. It is hoped that the workshop will provide practical recommendations on how the metadata registration standards should be further developed. We discussed various issues about the arrangements underway for the workshop A request was made that the latest version of the Metamodel for the Management of Sharable Data to be put on the X3L8 FTP site so that people can review it before the 7. Future meeting schedule X3L8 SIG meeting February 26 & 27, 1997 and X3L8 Plenary February 28 at Battelle (directions to the meeting site were shown on a diagram drawn by Doug Mann. He will prepare written directions to be sent with the meeting notices.) Note change >X3L8 SIG meeting March 20 & 21, 1997 at NIST North X3L8 SIG meeting April 10 & 11, 1997 at NIST North Directions to NIST North: NIST North is Building 820. The address of this building is 820 West Diamond Avenue. Note that the building is located across the street from the main campus of NIST. Instead of turning onto Bureau Drive toward the main Gate of NIST, turn the opposite direction (North) onto Bureau Drive and take the second possible right turn to get to the NIST North building, The building has the name "NIST" on it in large letters. (From Interstate 270, driving North, take Exit 10, which loops under the freeway, and then turn RIGHT at the first stop lightthis is the intersection of West Diamond Avenue and Bureau drive.) X3L8 documents, including this meeting report, are available via Anonymous FTP from speckle.ncsl.nist.gov. Log in as anonymous, use your email address for a password, Change directory to X3L8 (X3L8 in lower case letters) and check the "readme" file for details. Many of the documents are also listed on the X3L8 Home Page http://www.lbl.gov/~olken/X3L8