rfc2413.txt

<VC++网络游戏建摸与实现>源代码


RFC 2413      Dublin Core Metadata for Resource Discovery September 1998


   resource.  For the sake of interoperability, the format should be
   selected from an enumerated list that is currently under development
   in the workshop series.

4.10. Resource Identifier               Label: "Identifier"

   A string or number used to uniquely identify the resource.  Examples
   for networked resources include URLs and URNs (when implemented).
   Other globally-unique identifiers, such as International Standard
   Book Numbers (ISBN) or other formal names are also candidates for
   this element.

4.11. Source                            Label: "Source"

   Information about a second resource from which the present resource
   is derived.  While it is generally recommended that elements contain
   information about the present resource only, this element may contain
   metadata for the second resource when it is considered important for
   discovery of the present resource.

4.12. Language                          Label: "Language"

   The language of the intellectual content of the resource.
   Recommended best practice is defined in RFC 1766 [4].

4.13. Relation                          Label: "Relation"

   An identifier of a second resource and its relationship to the
   present resource.  This element is used to express linkages among
   related resources.  For the sake of interoperability, relationships
   should be selected from an enumerated list that is currently under
   development in the workshop series.

4.14. Coverage                          Label: "Coverage"

   The spatial or temporal characteristics of the intellectual content
   of the resource.  Spatial coverage refers to a physical region (e.g.,
   celestial sector) using place names or coordinates (e.g., longitude
   and latitude).  Temporal coverage refers to what the resource is
   about rather than when it was created or made available (the latter
   belonging in the Date element).  Temporal coverage is typically
   specified using named time periods (e.g., neolithic) or the same
   date/time format [3] as recommended for the Date element.








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4.15. Rights Management                 Label: "Rights"

   A rights management statement, an identifier that links to a rights
   management statement, or an identifier that links to a service
   providing information about rights management for the resource.

5. Security Considerations

   The Dublin Core element set poses no risk to computers and networks.
   It poses minimal risk to searchers who obtain incorrect or private
   information due to careless mapping from rich data descriptions to
   the simple Dublin Core scheme.  No other security concerns are likely
   to be raised by the element description consensus documented here.

6. References

   [1] Further information about the Dublin Core Metadata Element Set,
       http://purl.org/metadata/dublin_core

   [2] Extensible Markup Language (XML), http://www.w3.org/TR/REC-xml

   [3] Date and Time Formats (based on ISO 8601), W3C Technical Note,
       http://www.w3.org/TR/NOTE-datetime

   [4] Alvestrand, H., "Tags for the Identification of Languages", RFC
       1766, March 1995.

7. Authors' Addresses

   Stuart L. Weibel
   OCLC Online Computer Library Center, Inc.
   Office of Research
   6565 Frantz Rd.
   Dublin, Ohio, 43017, USA

   Phone: [phone]
   Fax:   [phone]
   EMail: [e-mail]













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   John A. Kunze
   Center for Knowledge Management
   University of California, San Francisco
   530 Parnassus Ave, Box 0840
   San Francisco, CA  94143-0840, USA

   Phone: [phone]
   Fax:   [phone]
   EMail: [e-mail]


   Carl Lagoze
   University Library and Department of Computer Science
   Cornell University
   Ithaca, NY  14853, USA

   Phone: [phone]
   Fax:   [phone]
   EMail: [e-mail]


   Misha Wolf
   Reuters Limited
   85 Fleet Street
   London EC4P 4AJ, UK

   Phone: [phone]
   Fax:   [phone]
   EMail: [e-mail]






















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8.  Full Copyright Statement

   Copyright (C) The Internet Society (1998).  All Rights Reserved.

   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.

   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

   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.
























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