Network Working Group A. Walsh
Request for Comments: 3541 Web3D Consortium
Category: Informational May 2003
Network Working Group A. Walsh
Request for Comments: 3541 Web3D Consortium
Category: Informational May 2003
A Uniform Resource Name (URN) Namespace for the Web3D Consortium (Web3D)
Web3D联盟（Web3D）的统一资源名称（URN）命名空间
Status of this Memo
本备忘录的状况
This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.
本备忘录为互联网社区提供信息。它没有规定任何类型的互联网标准。本备忘录的分发不受限制。
Copyright Notice
版权公告
Copyright (C) The Internet Society (2003). All Rights Reserved.
版权所有（C）互联网协会（2003年）。版权所有。
Abstract
摘要
This document describes a Uniform Resource Name (URN) namespace for the Web3D Consortium (Web3D) for naming persistent resources such as technical documents and specifications, Virtual Reality Modeling Language (VRML) and Extensible 3D (X3D) files and resources, Extensible Markup Language (XML) Document Type Definitions (DTDs), XML Schemas, namespaces, style sheets, media assets, and other resources produced or managed by Web3D.
本文档描述了Web3D联盟（Web3D）的统一资源名称（URN）命名空间，用于命名持久资源，如技术文档和规范、虚拟现实建模语言（VRML）和可扩展3D（X3D）文件和资源、可扩展标记语言（XML）文档类型定义（DTD）、XML模式、，Web3D生成或管理的名称空间、样式表、媒体资产和其他资源。
Web3D is a non-profit organization with a mandate to develop and promote open standards to enable 3D for the Internet, Web and broadcast applications. Web3D is responsible for developing, advancing, and maintaining the VRML97 ISO/IEC International Standard (ISO/IEC 14772-1:1997), X3D (the forthcoming official successor to VRML) and related technologies.
Web3D是一个非营利性组织，其任务是开发和推广开放标准，以实现互联网、Web和广播应用的3D。Web3D负责开发、推进和维护VRML97 ISO/IEC国际标准（ISO/IEC 14772-1:1997）、X3D（VRML的正式继任者）和相关技术。
Web3D maintains and extends its standardization activities through the coordinated efforts of dedicated Working Groups, Task Groups, and professional Liaisons to related standards bodies such as ISO, W3C, and MPEG. See http://web3d.org/ for details.
Web3D通过专门工作组、任务组和相关标准机构（如ISO、W3C和MPEG）的专业联络人的协调工作，维护和扩展其标准化活动。看见http://web3d.org/ 详情请参阅。
Web3D would like to assign unique, permanent, location-independent names based on URNs for some resources it produces or manages.
Web3D希望基于URN为其生成或管理的某些资源分配唯一、永久、位置独立的名称。
This namespace specification is for a formal namespace.
此名称空间规范适用于正式名称空间。
Namespace ID:
命名空间ID:
"web3d"
“web3d”
Registration Information:
注册资料：
Registration Version Number: 1 Registration Date: 2003-05-06
注册版本号：1注册日期：2003-05-06
Declared registrant of the namespace:
已声明命名空间的注册人：
Web3D Consortium, Inc.
Email: <contact@web3d.org>
Web: <http://web3d.org>
Web3D Consortium, Inc.
Email: <contact@web3d.org>
Web: <http://web3d.org>
c/o
Name : Aaron E. Walsh
Affiliation: Web3D Working Group Chair; Web3D Liaison to MPEG, W3C
Address : 18 Haviland Street, Boston, MA USA 02115
Phone : +1 (617) 536-3279
Email : <aaron@mantiscorp.com>
Web : <http://mantiscorp.com/people/aew/>
c/o
Name : Aaron E. Walsh
Affiliation: Web3D Working Group Chair; Web3D Liaison to MPEG, W3C
Address : 18 Haviland Street, Boston, MA USA 02115
Phone : +1 (617) 536-3279
Email : <aaron@mantiscorp.com>
Web : <http://mantiscorp.com/people/aew/>
Declaration of syntactic structure:
句法结构声明：
URNs assigned by Web3D will have the following hierarchical structure based on the group's organizational structure:
Web3D分配的URN将基于组的组织结构具有以下层次结构：
urn:web3d:{subgroup}:{subgroup-specific string}
urn:web3d:{subgroup}:{subgroup-specific string}
where "subgroup" corresponds to an official Web3D subgroup or activity such as the VRML standard ('vrml97'), Extensible 3D ('x3d'), Universal Media Working Group ('media'), Geographical VRML Working Group ('geovrml'), Humanoid Animation Working Group ('hanim') and so forth, and "subgroup-specific string" is a US-ASCII string that conforms to URN Syntax requirements ([RFC2141]).
其中，“子组”对应于官方Web3D子组或活动，如VRML标准（“vrml97”）、可扩展3D（“x3d”）、通用媒体工作组（“媒体”）、地理VRML工作组（“geovrml”）、类人动画工作组（“hanim”）等，以及“子组特定字符串”是符合URN语法要求的US-ASCII字符串（[RFC2141]）。
In cases where ownership or management of a resource is shared by multiple Web3D subgroups or activities, a general category may be used in place of a specific subgroup.
如果资源的所有权或管理由多个Web3D子组或活动共享，则可以使用一般类别代替特定子组。
Chairs of Web3D subgroups and activities assign all unique identifiers that fall within the scope of the subgroup or activity that they chair. Chairs of Web3D subgroups and activities are also responsible for publishing the specific structure of URNs assigned by their group or activity.
Web3D子组和活动的主席分配属于其主持的子组或活动范围内的所有唯一标识符。Web3D小组和活动的主席还负责发布其小组或活动指定的URN的特定结构。
Relevant ancillary documentation:
相关辅助文件：
None
没有一个
Identifier uniqueness considerations:
标识符唯一性注意事项：
Identifier uniqueness will be enforced by the Web3D Board of Directors (BoD) in cooperation with Chair(s) of corresponding Web3D subgroups.
标识唯一性将由Web3D董事会（BoD）与相应Web3D子组的主席合作实施。
Identifier persistence considerations:
标识符持久性注意事项：
Web3D is committed to maintaining the accessibility and persistence of all resources that are officially assigned URNs by the organization.
Web3D致力于维护组织正式分配给URN的所有资源的可访问性和持久性。
Process of identifier assignment:
标识符分配过程：
Assignment is limited to the owner and those authorities that are specifically designated by the owner. Web3D may designate portions of its namespace for assignment by other parties.
转让仅限于业主和业主特别指定的机构。Web3D可以指定其名称空间的一部分供其他方分配。
Process of identifier resolution:
标识符解析过程：
The owner will develop and maintain "URN catalogs" that map all assigned URNs to Uniform Resource Locators (URLs), specifically to enable Web-based resolution of named resources. In the future, an interactive online resolution system may be developed to automate this process.
所有者将开发和维护“URN目录”，将所有分配的URN映射到统一的资源定位器（URL），特别是支持基于Web的命名资源解析。将来，可能会开发一个交互式在线解决系统来自动化这一过程。
The owner will authorize additional resolution services as appropriate.
业主将酌情授权额外的解决服务。
Rules for Lexical Equivalence:
词汇对等规则：
URNs are lexically equivalent if they are lexically identical.
如果URN在词汇上相同，则它们在词汇上是等价的。
Conformance with URN Syntax:
符合URN语法：
No special considerations.
没有特别考虑。
Validation mechanism:
验证机制：
None specified. The owner will develop and maintain URN catalogs. The presence of a URN in a catalog indicates that it is valid.
没有具体说明。业主将开发和维护URN目录。目录中存在URN表示它是有效的。
Scope:
范围：
Global
全球的
The following examples are not guaranteed to be real. They are presented for pedagogical reasons only.
以下示例不能保证是真实的。它们仅出于教学方面的原因。
urn:web3d:vrml97:node:GeoCoordinate
urn:web3d:vrml97:node:NurbsCurve
urn:web3d:x3d:schemas:2002:compact
urn:web3d:x3d:schemas:2002:compromise
urn:web3d:media:textures:nature:grass
urn:web3d:vrml97:node:GeoCoordinate
urn:web3d:vrml97:node:NurbsCurve
urn:web3d:x3d:schemas:2002:compact
urn:web3d:x3d:schemas:2002:compromise
urn:web3d:media:textures:nature:grass
There are no additional security considerations other than those normally associated with the use and resolution of URNs in general.
除了通常与使用和解决骨灰盒相关的安全注意事项外，没有其他安全注意事项。
The Web3D Consortium (formerly "VRML Consortium") long acknowledged the value and utility of URNs starting with the VRML International Standard issued in 1997 (ISO/IEC 14772-1:1997, commonly known as "VRML97"). Annex F.2, "URNs", of that standard outlines non-normative use of URNs as a persistent naming mechanism for referenced resources such as files, EXTERNPROTOs, textures, and so forth.
Web3D联盟（以前称为“VRML联盟”）早就承认URN的价值和实用性，始于1997年发布的VRML国际标准（ISO/IEC 14772-1:1997，俗称“VRML97”）。该标准的附录F.2“URN”概述了URN作为参考资源（如文件、外部照片、纹理等）的持久命名机制的非规范性使用。
As such numerous VRML players and authoring tools, as well as content authoring communities, have adopted Web3D-oriented URNs for this purpose despite the fact that no formal "web3d" URN NID has been established by the Web3D Consortium. Consequently, interoperability of resources named using these disparate naming conventions is difficult, if not impossible, owing to the lack of a single, well defined "web3d" URN namespace that is formally registered and maintained by the Web3D Consortium.
因此，尽管Web3D联盟尚未建立正式的“Web3D”URN NID，但许多VRML播放器和创作工具以及内容创作社区都为此采用了面向Web3D的URN。因此，使用这些完全不同的命名约定命名的资源的互操作性即使不是不可能，也是很困难的，因为缺少一个由web3d联盟正式注册和维护的、定义良好的“web3d”URN命名空间。
In order to promote complete compatibility and interoperability across past, current and future Web3D standards, as well as across myriad Web3D-related products, tools, and content, the Web3D Consortium believes formal registration and management of the "web3d" URN namespace is necessary and in the best interest of the larger Internet- and Web-based communities it serves.
为了促进在过去、当前和未来的Web3D标准之间以及在众多Web3D相关产品、工具和内容之间的完全兼容性和互操作性，Web3D联盟相信“Web3D”的正式注册和管理URN名称空间是必要的，并且符合它所服务的更大的基于Internet和Web的社区的最佳利益。
The "web3d" URN namespace will be used to name VRML and X3D files and resources, XML DTDs and Schemas, namespaces, style sheets, media assets, and other resources produced or managed by Web3D. As an open
“web3d”URN名称空间将用于命名VRML和X3D文件和资源、XML DTD和模式、名称空间、样式表、媒体资产以及web3d生成或管理的其他资源。公开
standards organization, any Web3D Consortium resources that are officially named using the "web3d" namespace will be made freely available to the public.
在标准组织中，任何使用“Web3D”名称空间正式命名的Web3D联盟资源都将免费提供给公众。
Resources will be named and maintained in accordance with the process(es) described in this document. Any organization or individual can utilize the Web3D Consortium's freely available URN catalogs to resolve a resource named therein. Although the Web3D Consortium will control the naming and allocation of resources in order to maintain compliance with the process(es) described in this document, resolution and/or use of these resources is unrestricted and without fee in order to promote widespread adoption of open Web3D technologies. To this end, related documentation and open source resolvers will be freely provided through the Web3D Consortium's Web site.
资源将按照本文件中描述的流程进行命名和维护。任何组织或个人都可以利用Web3D联盟免费提供的URN目录来解析其中指定的资源。尽管Web3D联盟将控制资源的命名和分配，以保持符合本文件中所述的流程，但这些资源的解决和/或使用不受限制且不收费，以促进开放式Web3D技术的广泛采用。为此，相关文档和开源解析器将通过Web3D联盟的网站免费提供。
Additionally, member organizations or individuals that wish to name their own resources using the "web3d" namespace may submit such request(s) directly to the corresponding Web3D Working Group (subgroup) for subsequent review.
此外，希望使用“web3d”名称空间命名自己资源的成员组织或个人可以直接将此类请求提交给相应的web3d工作组（子组）进行后续审查。
This document describes a "web3d" URN NID registration for the Web3D Consortium which has been entered into the IANA registry of URN NIDs (http://www.iana.org/assignments/urn-namespaces).
本文档描述了web3d联盟的“web3d”URN NID注册，该注册已进入URN NID的IANA注册中心(http://www.iana.org/assignments/urn-namespaces).
References
工具书类
[RFC2141] Moats, R., "URN Syntax", RFC 2141, May 1997.
[RFC2141]Moats，R.，“瓮语法”，RFC 21411997年5月。
Author's Address
作者地址
Aaron E. Walsh Mantis Development Corp. 18 Haviland Street Boston, MA USA 02115
美国马萨诸塞州波士顿哈维兰街18号亚伦·E·沃尔什螳螂开发公司，邮编：02115
Phone: +1 (617) 536-3279
EMail: aaron@mantiscorp.com
Web : <http://mantiscorp.com/people/aew/>
Phone: +1 (617) 536-3279
EMail: aaron@mantiscorp.com
Web : <http://mantiscorp.com/people/aew/>
Full Copyright Statement
完整版权声明
Copyright (C) The Internet Society (2003). All Rights Reserved.
版权所有（C）互联网协会（2003年）。版权所有。
This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English.
本文件及其译本可复制并提供给他人，对其进行评论或解释或协助其实施的衍生作品可全部或部分编制、复制、出版和分发，不受任何限制，前提是上述版权声明和本段包含在所有此类副本和衍生作品中。但是，不得以任何方式修改本文件本身，例如删除版权通知或对互联网协会或其他互联网组织的引用，除非出于制定互联网标准的需要，在这种情况下，必须遵循互联网标准过程中定义的版权程序，或根据需要将其翻译成英语以外的其他语言。
The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assignees.
上述授予的有限许可是永久性的，互联网协会或其继承人或受让人不会撤销。
This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
本文件和其中包含的信息是按“原样”提供的，互联网协会和互联网工程任务组否认所有明示或暗示的保证，包括但不限于任何保证，即使用本文中的信息不会侵犯任何权利，或对适销性或特定用途适用性的任何默示保证。
Acknowledgement
确认
Funding for the RFC Editor function is currently provided by the Internet Society.
RFC编辑功能的资金目前由互联网协会提供。