| < draft-ietf-poisson-wg-guide-02.txt | draft-ietf-poisson-wg-guide-03.txt > | |||
|---|---|---|---|---|
| Network Working Group S. Bradner | Network Working Group S. Bradner | |||
| Internet-Draft Harvard University | Internet-Draft Harvard University | |||
| Editor | Editor | |||
| March 1998 | August 1998 | |||
| IETF Working Group | IETF Working Group | |||
| Guidelines and Procedures | Guidelines and Procedures | |||
| <draft-ietf-poisson-wg-guide-02.txt> | <draft-ietf-poisson-wg-guide-03.txt> | |||
| Status of this Memo | Status of this Memo | |||
| This document is an Internet-Draft. Internet-Drafts are working | This document is an Internet-Draft. Internet-Drafts are working | |||
| documents of the Internet Engineering Task Force (IETF), its areas, | documents of the Internet Engineering Task Force (IETF), its areas, | |||
| and its working groups. Note that other groups may also distribute | and its working groups. Note that other groups may also distribute | |||
| working documents as Internet-Drafts. | working documents as Internet-Drafts. | |||
| Internet-Drafts are draft documents valid for a maximum of six months | Internet-Drafts are draft documents valid for a maximum of six months | |||
| and may be updated, replaced, or obsoleted by other documents at any | and may be updated, replaced, or obsoleted by other documents at any | |||
| time. It is inappropriate to use Internet-Drafts as reference | time. It is inappropriate to use Internet-Drafts as reference | |||
| material or to cite them other than as ``work in progress.'' | material or to cite them other than as ``work in progress.'' | |||
| To learn the current status of any Internet-Draft, please check the | To view the entire list of current Internet-Drafts, please check the | |||
| ``1id-abstracts.txt'' listing contained in the Internet-Drafts Shadow | "1id-abstracts.txt" listing contained in the Internet-Drafts Shadow | |||
| Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe), | Directories on ftp.is.co.za (Africa), ftp.nordu.net (Northern | |||
| munnari.oz.au (Pacific Rim), ds.internic.net (US East Coast), or | Europe), ftp.nis.garr.it (Southern Europe), munnari.oz.au (Pacific | |||
| ftp.isi.edu (US West Coast). | Rim), ftp.ietf.org (US East Coast), or ftp.isi.edu (US West Coast). | |||
| Abstract | Abstract | |||
| The Internet Engineering Task Force (IETF) has responsibility for | The Internet Engineering Task Force (IETF) has responsibility for | |||
| developing and reviewing specifications intended as Internet | developing and reviewing specifications intended as Internet | |||
| Standards. IETF activities are organized into working groups (WGs). | Standards. IETF activities are organized into working groups (WGs). | |||
| This document describes the guidelines and procedures for formation | This document describes the guidelines and procedures for formation | |||
| and operation of IETF working groups. It also describes the formal | and operation of IETF working groups. It also describes the formal | |||
| relationship between IETF participants WG and the Internet | relationship between IETF participants WG and the Internet | |||
| Engineering Steering Group (IESG) and the basic duties of IETF | Engineering Steering Group (IESG) and the basic duties of IETF | |||
| participants, including WG Chairs, WG participants, and IETF Area | participants, including WG Chairs, WG participants, and IETF Area | |||
| skipping to change at page 2, line 4 ¶ | skipping to change at page 2, line 4 ¶ | |||
| Table of Contents | Table of Contents | |||
| Status of this Memo.................................................1 | Status of this Memo.................................................1 | |||
| Abstract............................................................1 | Abstract............................................................1 | |||
| 1. Introduction.....................................................2 | 1. Introduction.....................................................2 | |||
| 1.1. IETF approach to standardization.............................4 | 1.1. IETF approach to standardization.............................4 | |||
| 1.2. Roles within a Working Group.................................4 | 1.2. Roles within a Working Group.................................4 | |||
| 2. Working group formation..........................................4 | 2. Working group formation..........................................4 | |||
| 2.1. Criteria for formation.......................................4 | 2.1. Criteria for formation.......................................4 | |||
| 2.2. Charter......................................................5 | 2.2. Charter......................................................5 | |||
| 2.3. Charter review & approval....................................7 | 2.3. Charter review & approval....................................8 | |||
| 2.4. Birds of a feather (BOF).....................................8 | 2.4. Birds of a feather (BOF).....................................8 | |||
| 3. Working Group Operation..........................................9 | 3. Working Group Operation..........................................9 | |||
| 3.1. Session planning.............................................9 | 3.1. Session planning.............................................9 | |||
| 3.2. Session venue...............................................10 | 3.2. Session venue...............................................10 | |||
| 3.3. Session management..........................................11 | 3.3. Session management..........................................12 | |||
| 3.4. Contention and appeals......................................12 | 3.4. Contention and appeals......................................13 | |||
| 4. Working Group Termination.......................................13 | 4. Working Group Termination.......................................13 | |||
| 5. Rechartering a Working Group....................................13 | 5. Rechartering a Working Group....................................13 | |||
| 6. Staff Roles.....................................................13 | 6. Staff Roles.....................................................14 | |||
| 6.1. WG Chair....................................................14 | 6.1. WG Chair....................................................14 | |||
| 6.2. WG Secretary................................................15 | 6.2. WG Secretary................................................16 | |||
| 6.3. Document Editor.............................................15 | 6.3. Document Editor.............................................16 | |||
| 6.4. WG Facilitator..............................................16 | 6.4. WG Facilitator..............................................16 | |||
| 6.5. Design teams................................................16 | 6.5. Design teams................................................16 | |||
| 6.6. Working Group Consultant....................................16 | 6.6. Working Group Consultant....................................16 | |||
| 6.7. Area Director...............................................16 | 6.7. Area Director...............................................17 | |||
| 7. Working Group Documents.........................................16 | 7. Working Group Documents.........................................17 | |||
| 7.1. Session documents...........................................16 | 7.1. Session documents...........................................17 | |||
| 7.2. IETF meeting documents......................................16 | 7.2. IETF meeting documents......................................17 | |||
| 7.3. Internet-Drafts (I-D).......................................17 | 7.3. Internet-Drafts (I-D).......................................17 | |||
| 7.4. Request For Comments (RFC)..................................17 | 7.4. Request For Comments (RFC)..................................18 | |||
| 7.5. Working Group Last-Call.....................................17 | 7.5. Working Group Last-Call.....................................18 | |||
| 7.6. Submission of documents.....................................18 | 7.6. Submission of documents.....................................18 | |||
| 8. Review of documents.............................................18 | 8. Review of documents.............................................18 | |||
| 9. Security Considerations.........................................19 | 9. Security Considerations.........................................20 | |||
| 10. Acknowledgments................................................19 | 10. Acknowledgments................................................20 | |||
| 11. References.....................................................20 | 11. References.....................................................20 | |||
| 12. Authors' Address...............................................20 | 12. Authors' Address...............................................20 | |||
| Appendix: Sample Working Group Charter............................21 | Appendix: Sample Working Group Charter............................21 | |||
| 1. Introuction | 1. Introuction | |||
| The Internet, a loosely-organized international collaboration of | The Internet, a loosely-organized international collaboration of | |||
| autonomous, interconnected networks, supports host-to-host | autonomous, interconnected networks, supports host-to-host | |||
| communication through voluntary adherence to open protocols and | communication through voluntary adherence to open protocols and | |||
| procedures defined by Internet Standards. There are also many | procedures defined by Internet Standards. There are also many | |||
| isolated interconnected networks, which are not connected to the | isolated interconnected networks, which are not connected to the | |||
| skipping to change at page 8, line 19 ¶ | skipping to change at page 8, line 19 ¶ | |||
| good working group consensus about a bad design. To facilitate | good working group consensus about a bad design. To facilitate | |||
| working group efforts, an Area Director may assign a Consultant from | working group efforts, an Area Director may assign a Consultant from | |||
| among the ranks of senior IETF participants. (Consultants are | among the ranks of senior IETF participants. (Consultants are | |||
| described in section 6.) At the discretion of the Area Director, | described in section 6.) At the discretion of the Area Director, | |||
| approval of a new WG may be withheld in the absence of sufficient | approval of a new WG may be withheld in the absence of sufficient | |||
| consultant resources. | consultant resources. | |||
| Once the Area Director (and the Area Directorate, as the Area | Once the Area Director (and the Area Directorate, as the Area | |||
| Director deems appropriate) has approved the working group charter, | Director deems appropriate) has approved the working group charter, | |||
| the charter is submitted for review by the IAB and approval by the | the charter is submitted for review by the IAB and approval by the | |||
| IESG. The IESG MAY approve the charter as-is, it MAY request that | IESG. After a review period of at least a week the proposed charter | |||
| is posted to the IETF-announce mailing list as a public notice that | ||||
| the formation of the working group is being considered. At the same | ||||
| time the proposed charter is also posted to the "new-work" mailing | ||||
| list. This mailing list has been created to let qualified | ||||
| representatives from other standards organizations know about pending | ||||
| IETF working groups. After another review period lasting at least a | ||||
| week the IESG MAY approve the charter as-is, it MAY request that | ||||
| changes be made in the charter, or MAY decline to approve chartering | changes be made in the charter, or MAY decline to approve chartering | |||
| of the working group | of the working group | |||
| If the IESG approves the formation of the working group it remands | If the IESG approves the formation of the working group it remands | |||
| the approved charter to the IETF Secretariat who records and enters | the approved charter to the IETF Secretariat who records and enters | |||
| the information into the IETF tracking database. The working group | the information into the IETF tracking database. The working group | |||
| is announced to the IETF-announce mailing list by the IETF | is announced to the IETF-announce a by the IETF Secretariat. | |||
| Secretariat. | ||||
| 2.4. Birds of a feather (BOF) | 2.4. Birds of a feather (BOF) | |||
| Often it is not clear whether an issue merits the formation of a | Often it is not clear whether an issue merits the formation of a | |||
| working group. To facilitate exploration of the issues the IETF | working group. To facilitate exploration of the issues the IETF | |||
| offers the possibility of a Birds of a Feather (BOF) session, as well | offers the possibility of a Birds of a Feather (BOF) session, as well | |||
| as the early formation of an email list for preliminary discussion. | as the early formation of an email list for preliminary discussion. | |||
| In addition, a BOF may serve as a forum for a single presentation or | In addition, a BOF may serve as a forum for a single presentation or | |||
| discussion, without any intent to form a working group. | discussion, without any intent to form a working group. | |||
| A BOF is a session at an IETF meeting which permits "market research" | A BOF is a session at an IETF meeting which permits "market research" | |||
| skipping to change at page 13, line 50 ¶ | skipping to change at page 14, line 7 ¶ | |||
| 1. Recharter to refocus its tasks, | 1. Recharter to refocus its tasks, | |||
| 2. Choose new Chair(s), or | 2. Choose new Chair(s), or | |||
| 3. Disband. | 3. Disband. | |||
| If the working group disagrees with the Area Director's choice, it | If the working group disagrees with the Area Director's choice, it | |||
| may appeal to the IESG. (see section 3.4) | may appeal to the IESG. (see section 3.4) | |||
| 5. Rechartering a Working Group | 5. Rechartering a Working Group | |||
| Updated milestones are re-negotiated with the Area Director and the | Updated milestones are re-negotiated with the Area Director and the | |||
| IESG, as needed, and then are submitted to the IESG Secretary: iesg- | IESG, as needed, and then are submitted to the IESG Secretariat: | |||
| secretary@ietf.org | iesg-secretary@ietf.org | |||
| Rechartering (other than revising milestones) a working group follows | Rechartering (other than revising milestones) a working group follows | |||
| the same procedures that the initial chartering does. (see section 2) | the same procedures that the initial chartering does. (see section 2) | |||
| The revised charter must be submitted to the IESG and IAB for | The revised charter must be submitted to the IESG and IAB for | |||
| approval. As with the initial chartering, the IESG may approve new | approval. As with the initial chartering, the IESG may approve new | |||
| charter as-is, it may request that changes be made in the new charter | charter as-is, it may request that changes be made in the new charter | |||
| (including having the Working Group continue to use the old charter), | (including having the Working Group continue to use the old charter), | |||
| or it may decline to approve the rechartered working group. In the | or it may decline to approve the rechartered working group. In the | |||
| latter case the working group is disbanded. | latter case the working group is disbanded. | |||
| 6. Staff Roles | 6. Staff Roles | |||
| Working groups require considerable care and feeding. In addition to | Working groups require considerable care and feeding. In addition to | |||
| general participation, successful working groups benefit from the | general participation, successful working groups benefit from the | |||
| efforts of participants filling specific functional roles. The Area | efforts of participants filling specific functional roles. The Area | |||
| Director must agree to the specific people performing the WG Chair, | Director must agree to the specific people performing the WG Chair, | |||
| Document Editor and Working Group Consultant roles, and they serve at | and Working Group Consultant roles, and they serve at the discretion | |||
| the discretion of the Area Director. | of the Area Director. | |||
| 6.1. WG Chair | 6.1. WG Chair | |||
| The Working Group Chair is concerned with making forward progress | The Working Group Chair is concerned with making forward progress | |||
| through a fair and open process, and has wide discretion in the | through a fair and open process, and has wide discretion in the | |||
| conduct of WG business. The Chair must ensure that a number of tasks | conduct of WG business. The Chair must ensure that a number of tasks | |||
| are performed, either directly or by others assigned to the tasks. | are performed, either directly or by others assigned to the tasks. | |||
| This encompasses at the very least the following: | ||||
| The Chair has the responsibility and the authority to make decisions, | ||||
| on behalf of the working group, regarding all matters of working | ||||
| group process and staffing, in conformance with the rules of the | ||||
| IETF. The AD has the authority and the responsibility to assist in | ||||
| making those decisions at the request of the Chair or when | ||||
| circumstances warrant such an intervention. | ||||
| The Chair's responsibility encompasses at least the following: | ||||
| Ensure WG process and content management | Ensure WG process and content management | |||
| The Chair has ultimate responsibility for ensuring that a working | The Chair has ultimate responsibility for ensuring that a working | |||
| group achieves forward progress and meets its milestones. The Chair | group achieves forward progress and meets its milestones. The Chair | |||
| is also responsible to ensure that the working group operates in an | is also responsible to ensure that the working group operates in an | |||
| open and fair manner. For some working groups, this can be | open and fair manner. For some working groups, this can be | |||
| accomplished by having the Chair perform all management-related | accomplished by having the Chair perform all management-related | |||
| activities. In other working groups -- particularly those with large | activities. In other working groups -- particularly those with large | |||
| or divisive participation -- it is helpful to allocate process and/or | or divisive participation -- it is helpful to allocate process and/or | |||
| secretarial functions to other participants. Process management | secretarial functions to other participants. Process management | |||
| skipping to change at page 15, line 19 ¶ | skipping to change at page 15, line 30 ¶ | |||
| Plan WG Sessions | Plan WG Sessions | |||
| The Chair must plan and announce all WG sessions well in advance. | The Chair must plan and announce all WG sessions well in advance. | |||
| (See section 3.1) | (See section 3.1) | |||
| Communicate results of sessions | Communicate results of sessions | |||
| The Chair and/or Secretary must ensure that minutes of a session are | The Chair and/or Secretary must ensure that minutes of a session are | |||
| taken and that an attendance list is circulated. (See section 3.1) | taken and that an attendance list is circulated. (See section 3.1) | |||
| Immediately after a session, the WG Chair MUST provide the Area | Immediately after a session, the WG Chair MUST provide the Area | |||
| Director with a very short report (approximately one paragraph, via | Director with a very short report (approximately one paragraph, via | |||
| email) on the session. This is used in an Area Report presented in | email) on the session. | |||
| the Proceedings of each IETF meeting. | ||||
| Distribute the workload | Distribute the workload | |||
| Of course each WG will have participants who may not be able (or | Of course each WG will have participants who may not be able (or | |||
| want) to do any work at all. Most of the time the bulk of the work is | want) to do any work at all. Most of the time the bulk of the work is | |||
| done by a few dedicated participants. It is the task of the Chair to | done by a few dedicated participants. It is the task of the Chair to | |||
| motivate enough experts to allow for a fair distribution of the | motivate enough experts to allow for a fair distribution of the | |||
| workload. | workload. | |||
| Document development | Document development | |||
| Working groups produce documents and documents need authors. The | Working groups produce documents and documents need authors. The | |||
| skipping to change at page 16, line 28 ¶ | skipping to change at page 16, line 38 ¶ | |||
| 6.4. WG Facilitator | 6.4. WG Facilitator | |||
| When meetings tend to become distracted or divisive, it often is | When meetings tend to become distracted or divisive, it often is | |||
| helpful to assign the task of "process management" to one | helpful to assign the task of "process management" to one | |||
| participant. Their job is to oversee the nature, rather than the | participant. Their job is to oversee the nature, rather than the | |||
| content, of participant interactions. That is, they attend to the | content, of participant interactions. That is, they attend to the | |||
| style of the discussion and to the schedule of the agenda, rather | style of the discussion and to the schedule of the agenda, rather | |||
| than making direct technical contributions themselves. | than making direct technical contributions themselves. | |||
| 6.5. Design teams | 6.5. Design teams | |||
| In some cases some of the detailed specification effort within a | It is often useful, and perhaps inevitable, for a sub-group of a | |||
| working group may be done by sub-groups, referred to as design teams, | working group to develop a proposal to solve a particular problem. | |||
| with the (implicit or explicit) approval of the working group and the | Such a sub-group is called a design team. In order for a design team | |||
| explicit approval of the Area Director. Such a team may hold closed | to remain small and agile, it is acceptable to have closed membership | |||
| sessions for conducting portions of the specification effort. All | and private meetings. Design teams may range from an informal chat | |||
| work products of a design team must be available for review by all | between people in a hallway to a formal set of expert volunteers that | |||
| working group participants. The design team must be responsive to | the WG chair or AD appoints to attack a controversial problem. The | |||
| the direction of the working group's consensus and its output is | output of a design team is always subject to approval, rejection or | |||
| subject to the approval of the working group. The duration of a | modification by the WG as a whole. | |||
| design team effort is up to the working group chair(s) and the Area | ||||
| Director(s). | ||||
| 6.6. Working Group Consultant | 6.6. Working Group Consultant | |||
| At the discretion of the Area Director, a Consultant may be assigned | At the discretion of the Area Director, a Consultant may be assigned | |||
| to a working group. Consultants have specific technical background | to a working group. Consultants have specific technical background | |||
| appropriate to the WG and experience in Internet architecture and | appropriate to the WG and experience in Internet architecture and | |||
| IETF process. | IETF process. | |||
| 6.7. Area Director | 6.7. Area Director | |||
| Area Directors are responsible for ensuring that working groups in | Area Directors are responsible for ensuring that working groups in | |||
| their area produce coherent, coordinated, architecturally consistent | their area produce coherent, coordinated, architecturally consistent | |||
| and timely output as a contribution to the overall results of the | and timely output as a contribution to the overall results of the | |||
| IETF. | IETF. | |||
| 7. Working Group Documents | 7. Working Group Documents | |||
| 7.1. Session documents | 7.1. Session documents | |||
| All relevant documents for a session (including the final agenda) | All relevant documents for a session should be published and | |||
| should be published and available as Internet-Drafts at least two | available as Internet-Drafts at least two weeks before a session | |||
| weeks before a session starts. Any document which does not meet this | starts. Any document which does not meet this publication deadline | |||
| pubication deadline can only be discussed in a working group session | can only be discussed in a working group session with the specific | |||
| with the specific approval of the working group chair(s). | approval of the working group chair(s). The final session agenda | |||
| should be posted to the working group mailing list at two weeks | ||||
| before the session. | ||||
| 7.2. IETF meeting documents | 7.2. IETF meeting documents | |||
| In preparing for an IETF meeting it is helpful to have ready access | In preparing for an IETF meeting it is helpful to have ready access | |||
| to all documents that are being reviewed. Thus all documents which | to all documents that are being reviewed. Thus all documents which | |||
| will be under discussion in a working group session must be published | will be under discussion in a working group session must be published | |||
| as Internet-Drafts before the session. | as Internet-Drafts before the session. | |||
| 7.3. Internet-Drafts (I-D) | 7.3. Internet-Drafts (I-D) | |||
| The Internet-Drafts directory is provided to working groups as a | The Internet-Drafts directory is provided to working groups as a | |||
| resource for posting and disseminating in-process copies of working | resource for posting and disseminating in-process copies of working | |||
| skipping to change at page 18, line 29 ¶ | skipping to change at page 18, line 39 ¶ | |||
| Call. The decision to issue a working group Last-Call is at the | Call. The decision to issue a working group Last-Call is at the | |||
| discretion of the WG Chair working with the Area Director. A working | discretion of the WG Chair working with the Area Director. A working | |||
| group Last-Call serves the same purpose within a working group that | group Last-Call serves the same purpose within a working group that | |||
| an IESG Last-Call does in the broader IETF community. (See [1].) | an IESG Last-Call does in the broader IETF community. (See [1].) | |||
| 7.6 Submission of documents | 7.6 Submission of documents | |||
| Once that a WG has determined that at least rough consensus exists | Once that a WG has determined that at least rough consensus exists | |||
| within the WG for the advancement of a document the following must be | within the WG for the advancement of a document the following must be | |||
| done: | done: | |||
| - The version of the relevant document exactly as agreed to by the | - The version of the relevant document exactly as agreed to by the | |||
| WG MUST be in the Internet-Drafts directory; | WG MUST be in the Internet-Drafts directory; | |||
| - The relevant document MUST be formatted according to RFC rules | - The relevant document MUST be formatted according to RFC rules | |||
| [5]. | [5]. | |||
| - The WG Chair MUST send email to the relevant Area Director. A | - The WG Chair MUST send email to the relevant Area Director. A | |||
| copy of the request MUST be also sent to the IESG Secretary. The | copy of the request MUST be also sent to the IESG Secretariat. | |||
| mail MUST contain the reference to the document's ID filename, and | The mail MUST contain the reference to the document's ID filename, | |||
| the action requested. | and the action requested. | |||
| Unless returned to the WG for further development, progressing of the | Unless returned to the WG for further development, progressing of the | |||
| document is then the responsibility of the IESG. After IESG | document is then the responsibility of the IESG. After IESG | |||
| approval, responsibility for final disposition is the joint | approval, responsibility for final disposition is the joint | |||
| responsibility of the RFC Editor and the WG Chair and the Document | responsibility of the RFC Editor, the WG Chair and the Document | |||
| Editor. | Editor. | |||
| 8. Review of documents | 8. Review of documents | |||
| The IESG reviews all documents submitted for publication as RFCs. | The IESG reviews all documents submitted for publication as RFCs. | |||
| Usually minimal IESG review is necessary in the case of a submission | Usually minimal IESG review is necessary in the case of a submission | |||
| from a WG intended as an Informational or Experimental RFC. More | from a WG intended as an Informational or Experimental RFC. More | |||
| extensive review is undertaken in the case of standards-track | extensive review is undertaken in the case of standards-track | |||
| documents. | documents. | |||
| Prior to the IESG beginning their deliberations, IETF Secretariat | Prior to the IESG beginning their deliberations on standards-track | |||
| will issue a "Last-Call" to the IETF mailing list. (See [1]) This | documents, IETF Secretariat will issue a "Last-Call" to the IETF | |||
| Last Call will announce the intention of the IESG to consider the | mailing list. (See [1]) This Last Call will announce the intention | |||
| document, and it will solicit final comments from the IETF within a | of the IESG to consider the document, and it will solicit final | |||
| period of two weeks. It is important to note that a Last-Call is | comments from the IETF within a period of two weeks. It is important | |||
| intended as a brief, final check with the Internet community, to make | to note that a Last-Call is intended as a brief, final check with the | |||
| sure that no important concerns have been missed or misunderstood. | Internet community, to make sure that no important concerns have been | |||
| The Last-Call should not serve as a more general, in-depth review. | missed or misunderstood. The Last-Call should not serve as a more | |||
| general, in-depth review. | ||||
| The IESG review takes into account responses to the Last-Call and | The IESG review takes into account responses to the Last-Call and | |||
| will lead to one of these possible conclusions: | will lead to one of these possible conclusions: | |||
| 1. The document is accepted as is for the status requested. | 1. The document is accepted as is for the status requested. | |||
| This fact will be announced by the IETF Secretariat to the IETF | This fact will be announced by the IETF Secretariat to the IETF | |||
| mailing list and to the RFC Editor. | mailing list and to the RFC Editor. | |||
| 2. The document is accepted as-is but not for the status requested. | 2. The document is accepted as-is but not for the status requested. | |||
| This fact will be announced by the IETF Secretariat to the IETF | This fact will be announced by the IETF Secretariat to the IETF | |||
| mailing list and to the RFC Editor. (see [1] for more details) | mailing list and to the RFC Editor. (see [1] for more details) | |||
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| 60 lines changed or deleted | 74 lines changed or added | |||
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