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An HTTP-Based Versioning Mechanism for Linked Data

The document discusses the Memento framework, which serves as an HTTP-based versioning mechanism for linked data, enabling 'time travel' across web resources and their versions. It highlights the integration of current and archived web content, allowing users to navigate historical versions easily, which is achieved through HTTP datetime content negotiation. The Memento approach is exemplified through specific applications, including a demonstrator using DBpedia data.

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An HTTP-Based Versioning Mechanism for Linked Data
 Herbert Van de Sompel Robert Sanderson Michael L. Nelson Lyudmila Balakireva Harihar Shankar Scott Ainsworth Memento is partially funded by the Library of Congress An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Time-Series Analysis across DBpedia Versions Data collected through HTTP Navigation An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Time Travel across Versions of a Picture of the Day Data collected through HTTP Navigation An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Outline •  Memento - Time Travel for the Web •  Resource Versioning suggested by Memento •  Resource Versioning for Linked Data •  DBpedia Demonstrator An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Outline •  Memento - Time Travel for the Web •  Resource Versioning suggested by Memento •  Resource Versioning for Linked Data •  DBpedia Demonstrator An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Resources have Representations that Change over Time An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Archived Resources serve prior Representations An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Sep 11 2001, 20:36:10 UTC Dec 20 2001, 4:51:00 UTC Archived Resources http://en.wikipedia.org/w/index.php? http://web.archive.org/web/20010911203610/http:// title=September_11_attacks&oldid=282333 archived www.cnn.com/ archived resource for http://cnn.com resource for http://en.wikipedia.org/wiki/ September_11_attacks An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Current and Past Web are Not Integrated •  Current and Past Web based on same technology. •  But, going from Current to Past Web is a matter of (manual) discovery. •  Memento wants to make going from Current to Past Web a (HTTP) protocol matter. •  Memento wants to integrate the Current And Past Web. An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Vision: Navigate the Web of the Past http://en.wikipedea.org/wiki/ Robots_exclusion_protocol An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Vision: Navigate the Web of the Past http://en.wikipedea.org/wiki/ Robots_exclusion_protocol Oct 11 2009, 05:30:33 UTC Set browser time dial to … An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Vision: Navigate the Web of the Past http://en.wikipedea.org/wiki/ From Wikipedia History Robots_exclusion_protocol Oct 11 2009, 05:30:33 UTC Sep 15 2009, 20:49:00 UTC An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Vision: Navigate the Web of the Past Robots Exclusion Oct 11 2009, 05:30:33 UTC An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Vision: Navigate the Web of the Past http://www.robotstxt.org/ Oct 11 2009, 05:30:33 UTC Browser time dial still at … An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Vision: Navigate the Web of the Past http://www.robotstxt.org/ From Internet Archive Oct 11 2009, 05:30:33 UTC Nov 09 2007, 06:21:04 UTC Browser time dial still at … An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
The Memento Approach Navigation to an archived resource by leveraging: •  The original resource; •  HTTP datetime content negotiation. An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
original Mementos resource original server archival server An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
DT-conneg with URI-G to get URI-M original TimeGate Mementos resource transparently variant negotiable resources resource original server archival server An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
HTTP Link DT-conneg with URI-G to get URI-M timegate original TimeGate Mementos resource transparently variant negotiable resources resource original server archival server An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Memento HTTP Flow HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,M
The Memento Framework An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Outline •  Memento - Time Travel for the Web •  Resource Versioning suggested by Memento •  Resource Versioning for Linked Data •  DBpedia Demonstrator An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Prior pictures of the day Current picture of the day An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Outline •  Memento - Time Travel for the Web •  Resource Versioning suggested by Memento •  Resource Versioning for Linked Data •  DBpedia Demonstrator An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Outline •  Memento - Time Travel for the Web •  Resource Versioning suggested by Memento •  Resource Versioning for Linked Data •  DBpedia Demonstrator An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Memento HTTP Flow HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,B,M
Memento HTTP Flow: URI-R HEAD R, (Accept-Datetime) HEAD /resource/France HTTP/1.1 Host: dbpedia.org Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Memento HTTP Flow HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,B,M
Memento HTTP Flow: Success – URI-R LinkG HTTP/1.1 303 See Other Server: Virtuoso/06.01.3127 (Solaris) x86_64-sun-solaris2.10-64 VDB Connection: close Content-Type: text/html; charset=UTF-8 Date: Tue, 20 Apr 2010 16:48:51 GMT Accept-Ranges: bytes Location: http://dbpedia.org/page/France Transfer-Encoding: chunked Content-Encoding: gzip Link: <http://mementoarchive.lanl.gov/dbpedia/timegate/http://dbpedia.org/resource/ France>; rel="timegate”
Memento HTTP Flow HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,B,M
Memento HTTP Flow: URI-G GET G, Accept-Datetime GET /dbpedia/timegate/http://dbpedia.org/resource/France HTTP/1.1 Host: mementoarchive.lanl.gov Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Accept-Datetime: Wed, 08 Jul 2009 06:00:00 GMT
Memento HTTP Flow HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,B,M
Memento HTTP Flow: Success – URI-G 302M, Vary, TCN, LinkR,B,M HTTP/1.1 302 Found Date: Tue, 20 Apr 2010 17:51:00 GMT Server: Apache TCN: choice Vary: negotiate, Accept-Datetime Location: http://mementoarchive.lanl.gov/dbpedia/memento/20090701/http:// dbpedia.org/page/France.html Link: <http://dbpedia.org/resource/France>;rel="original", <http://mementoarchive.lanl.gov/dbpedia/memento/20070901/http://dbpedia.org/page/ France.html>;rel="first-memento";datetime="Sat, 01 Sep 2007 00:00:00 GMT", <http://mementoarchive.lanl.gov/dbpedia/memento/20091101/http://dbpedia.org/page/ France.html>;rel="last-memento next-memento";datetime="Sun, 01 Nov 2009 00:00:00 GMT", <http://mementoarchive.lanl.gov/dbpedia/memento/20081101/http://dbpedia.org/page/ France.html>;rel="prev-memento";datetime="Sat, 01 Nov 2008 00:00:00 GMT", <http://mementoarchive.lanl.gov/dbpedia/memento/20090701/http://dbpedia.org/page/ France.html>;rel="memento";datetime="Wed, 01 Jul 2009 00:00:00 GMT”, <http://mementoarchive.lanl.gov/dbpedia/timebundle/http://dbpedia.org/page/ France>;rel="timebundle” Transfer-Encoding: chunked Content-Type: text/html; charset=UTF-8
Memento HTTP Flow HEAD R, Accept-Datetime LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, Accept-Datetime 200, Content-Datetime, LinkR,B,M
Memento HTTP Flow: URI-M GET M, (Accept-Datetime) GET /dbpedia/memento/20090701/http://dbpedia.org/page/France.html HTTP/1.1 Host: mementoarchive.lanl.gov Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Connection: close
Memento HTTP Flow HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,B,M
Memento HTTP Flow: Success – URI-M 200, Content-Datetime, LinkR,B,M HTTP/1.1 200 OK Date: Tue, 20 Apr 2010 17:51:00 GMT Server: Apache Content-Datetime: Wed, 01 Jul 2009 00:00:00 GMT Link: <http://mementoarchive.lanl.gov/dbpedia/timegate/http://dbpedia.org/page/ France.html>;rel="timegate", <http://dbpedia.org/page/France.html>;rel="original", <http://mementoarchive.lanl.gov/dbpedia/memento/20070901/http://dbpedia.org/page/ France.html>;rel="first-memento";datetime="Sat, 01 Sep 2007 00:00:00 GMT", <http://mementoarchive.lanl.gov/dbpedia/memento/20091101/http://dbpedia.org/page/ France.html>;rel="last-memento next-memento";datetime="Sun, 01 Nov 2009 00:00:00 GMT", <http://mementoarchive.lanl.gov/dbpedia/memento/20081101/http://dbpedia.org/page/ France.html>;rel="prev-memento";datetime="Sat, 01 Nov 2008 00:00:00 <http://mementoarchive.lanl.gov/dbpedia/timebundle/http://dbpedia.org/page/ France.html>;rel="timebundle” Connection: close Transfer-Encoding: chunked Content-Type: text/html; charset=UTF-8
Time-Series Analysis across DBpedia Versions Data collected through HTTP Navigation An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Conclusions URI as access point to page An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Conclusions Increased value: URI as access point to page and data An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Conclusions Increased value: URI as access point to current & historical page and data An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
Memento wants to make navigating the Web’s Past Easy http://www.mementoweb.org http://groups.google.com/group/memento-dev An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
References •  Tim Berners-Lee (1996,2000) Generic Resources. http://www.w3.org/DesignIssues/Generic.html •  Van de Sompel, H., Sanderson, R., Nelson, M.L., Balakireva, L., Ainsworth, S., Shankar, H. (2010) An HTTP-Based Versioning Mechanism for Linked Data. Proceedings of the 3rd Workshop on Linked Data on the Web. http://arxiv.org/abs/1003.3661 •  Sanderson, R., and Van de Sompel, H. (2010) Making Web Annotations Persistent over Time. Proceedings of the 10th ACM/IEEE-CS Joint Conference on Digital libraries. http://arxiv.org/abs/1003.2643 •  Van de Sompel, H., Nelson, M.L., Sanderson, R., Balakireva, L., Ainsworth, S., Shankar, H. (2009) Memento: Time Travel for the Web. http://arxiv.org/abs/0911.1112 An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC

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An HTTP-Based Versioning Mechanism for Linked Data

  • 1.
    An HTTP-Based VersioningMechanism for Linked Data
 Herbert Van de Sompel Robert Sanderson Michael L. Nelson Lyudmila Balakireva Harihar Shankar Scott Ainsworth Memento is partially funded by the Library of Congress An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 2.
    Time-Series Analysis acrossDBpedia Versions Data collected through HTTP Navigation An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 3.
    Time Travel acrossVersions of a Picture of the Day Data collected through HTTP Navigation An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 4.
    Outline •  Memento -Time Travel for the Web •  Resource Versioning suggested by Memento •  Resource Versioning for Linked Data •  DBpedia Demonstrator An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 5.
    Outline •  Memento -Time Travel for the Web •  Resource Versioning suggested by Memento •  Resource Versioning for Linked Data •  DBpedia Demonstrator An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 6.
    Resources have Representationsthat Change over Time An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 7.
    Archived Resources serveprior Representations An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 8.
    Sep 11 2001,20:36:10 UTC Dec 20 2001, 4:51:00 UTC Archived Resources http://en.wikipedia.org/w/index.php? http://web.archive.org/web/20010911203610/http:// title=September_11_attacks&oldid=282333 archived www.cnn.com/ archived resource for http://cnn.com resource for http://en.wikipedia.org/wiki/ September_11_attacks An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 9.
    Current and PastWeb are Not Integrated •  Current and Past Web based on same technology. •  But, going from Current to Past Web is a matter of (manual) discovery. •  Memento wants to make going from Current to Past Web a (HTTP) protocol matter. •  Memento wants to integrate the Current And Past Web. An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 10.
    Vision: Navigate theWeb of the Past http://en.wikipedea.org/wiki/ Robots_exclusion_protocol An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 11.
    Vision: Navigate theWeb of the Past http://en.wikipedea.org/wiki/ Robots_exclusion_protocol Oct 11 2009, 05:30:33 UTC Set browser time dial to … An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 12.
    Vision: Navigate theWeb of the Past http://en.wikipedea.org/wiki/ From Wikipedia History Robots_exclusion_protocol Oct 11 2009, 05:30:33 UTC Sep 15 2009, 20:49:00 UTC An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 13.
    Vision: Navigate theWeb of the Past Robots Exclusion Oct 11 2009, 05:30:33 UTC An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 14.
    Vision: Navigate theWeb of the Past http://www.robotstxt.org/ Oct 11 2009, 05:30:33 UTC Browser time dial still at … An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 15.
    Vision: Navigate theWeb of the Past http://www.robotstxt.org/ From Internet Archive Oct 11 2009, 05:30:33 UTC Nov 09 2007, 06:21:04 UTC Browser time dial still at … An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 16.
    The Memento Approach Navigationto an archived resource by leveraging: •  The original resource; •  HTTP datetime content negotiation. An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 17.
    original Mementos resource original server archival server An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 18.
    DT-conneg with URI-Gto get URI-M original TimeGate Mementos resource transparently variant negotiable resources resource original server archival server An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 19.
    HTTP Link DT-conneg with URI-G to get URI-M timegate original TimeGate Mementos resource transparently variant negotiable resources resource original server archival server An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 20.
    Memento HTTP Flow HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,M
  • 21.
    The Memento Framework AnHTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 22.
    Outline •  Memento -Time Travel for the Web •  Resource Versioning suggested by Memento •  Resource Versioning for Linked Data •  DBpedia Demonstrator An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 23.
    An HTTP-Based VersioningMechanism for Linked Data LDOW 2010, Raleigh, NC
  • 24.
    An HTTP-Based VersioningMechanism for Linked Data LDOW 2010, Raleigh, NC
  • 25.
    An HTTP-Based VersioningMechanism for Linked Data LDOW 2010, Raleigh, NC
  • 26.
    An HTTP-Based VersioningMechanism for Linked Data LDOW 2010, Raleigh, NC
  • 27.
    An HTTP-Based VersioningMechanism for Linked Data LDOW 2010, Raleigh, NC
  • 28.
    An HTTP-Based VersioningMechanism for Linked Data LDOW 2010, Raleigh, NC
  • 29.
    An HTTP-Based VersioningMechanism for Linked Data LDOW 2010, Raleigh, NC
  • 30.
    Prior pictures ofthe day Current picture of the day An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 31.
    Outline •  Memento -Time Travel for the Web •  Resource Versioning suggested by Memento •  Resource Versioning for Linked Data •  DBpedia Demonstrator An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 32.
    An HTTP-Based VersioningMechanism for Linked Data LDOW 2010, Raleigh, NC
  • 33.
    An HTTP-Based VersioningMechanism for Linked Data LDOW 2010, Raleigh, NC
  • 34.
    An HTTP-Based VersioningMechanism for Linked Data LDOW 2010, Raleigh, NC
  • 35.
    Outline •  Memento -Time Travel for the Web •  Resource Versioning suggested by Memento •  Resource Versioning for Linked Data •  DBpedia Demonstrator An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 36.
    An HTTP-Based VersioningMechanism for Linked Data LDOW 2010, Raleigh, NC
  • 37.
    Memento HTTP Flow HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,B,M
  • 38.
    Memento HTTP Flow:URI-R HEAD R, (Accept-Datetime) HEAD /resource/France HTTP/1.1 Host: dbpedia.org Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
  • 39.
    Memento HTTP Flow HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,B,M
  • 40.
    Memento HTTP Flow:Success – URI-R LinkG HTTP/1.1 303 See Other Server: Virtuoso/06.01.3127 (Solaris) x86_64-sun-solaris2.10-64 VDB Connection: close Content-Type: text/html; charset=UTF-8 Date: Tue, 20 Apr 2010 16:48:51 GMT Accept-Ranges: bytes Location: http://dbpedia.org/page/France Transfer-Encoding: chunked Content-Encoding: gzip Link: <http://mementoarchive.lanl.gov/dbpedia/timegate/http://dbpedia.org/resource/ France>; rel="timegate”
  • 41.
    Memento HTTP Flow HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,B,M
  • 42.
    Memento HTTP Flow:URI-G GET G, Accept-Datetime GET /dbpedia/timegate/http://dbpedia.org/resource/France HTTP/1.1 Host: mementoarchive.lanl.gov Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Accept-Datetime: Wed, 08 Jul 2009 06:00:00 GMT
  • 43.
    Memento HTTP Flow HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,B,M
  • 44.
    Memento HTTP Flow:Success – URI-G 302M, Vary, TCN, LinkR,B,M HTTP/1.1 302 Found Date: Tue, 20 Apr 2010 17:51:00 GMT Server: Apache TCN: choice Vary: negotiate, Accept-Datetime Location: http://mementoarchive.lanl.gov/dbpedia/memento/20090701/http:// dbpedia.org/page/France.html Link: <http://dbpedia.org/resource/France>;rel="original", <http://mementoarchive.lanl.gov/dbpedia/memento/20070901/http://dbpedia.org/page/ France.html>;rel="first-memento";datetime="Sat, 01 Sep 2007 00:00:00 GMT", <http://mementoarchive.lanl.gov/dbpedia/memento/20091101/http://dbpedia.org/page/ France.html>;rel="last-memento next-memento";datetime="Sun, 01 Nov 2009 00:00:00 GMT", <http://mementoarchive.lanl.gov/dbpedia/memento/20081101/http://dbpedia.org/page/ France.html>;rel="prev-memento";datetime="Sat, 01 Nov 2008 00:00:00 GMT", <http://mementoarchive.lanl.gov/dbpedia/memento/20090701/http://dbpedia.org/page/ France.html>;rel="memento";datetime="Wed, 01 Jul 2009 00:00:00 GMT”, <http://mementoarchive.lanl.gov/dbpedia/timebundle/http://dbpedia.org/page/ France>;rel="timebundle” Transfer-Encoding: chunked Content-Type: text/html; charset=UTF-8
  • 45.
    Memento HTTP Flow HEAD R, Accept-Datetime LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, Accept-Datetime 200, Content-Datetime, LinkR,B,M
  • 46.
    Memento HTTP Flow:URI-M GET M, (Accept-Datetime) GET /dbpedia/memento/20090701/http://dbpedia.org/page/France.html HTTP/1.1 Host: mementoarchive.lanl.gov Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Connection: close
  • 47.
    Memento HTTP Flow HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,B,M
  • 48.
    Memento HTTP Flow:Success – URI-M 200, Content-Datetime, LinkR,B,M HTTP/1.1 200 OK Date: Tue, 20 Apr 2010 17:51:00 GMT Server: Apache Content-Datetime: Wed, 01 Jul 2009 00:00:00 GMT Link: <http://mementoarchive.lanl.gov/dbpedia/timegate/http://dbpedia.org/page/ France.html>;rel="timegate", <http://dbpedia.org/page/France.html>;rel="original", <http://mementoarchive.lanl.gov/dbpedia/memento/20070901/http://dbpedia.org/page/ France.html>;rel="first-memento";datetime="Sat, 01 Sep 2007 00:00:00 GMT", <http://mementoarchive.lanl.gov/dbpedia/memento/20091101/http://dbpedia.org/page/ France.html>;rel="last-memento next-memento";datetime="Sun, 01 Nov 2009 00:00:00 GMT", <http://mementoarchive.lanl.gov/dbpedia/memento/20081101/http://dbpedia.org/page/ France.html>;rel="prev-memento";datetime="Sat, 01 Nov 2008 00:00:00 <http://mementoarchive.lanl.gov/dbpedia/timebundle/http://dbpedia.org/page/ France.html>;rel="timebundle” Connection: close Transfer-Encoding: chunked Content-Type: text/html; charset=UTF-8
  • 49.
    Time-Series Analysis acrossDBpedia Versions Data collected through HTTP Navigation An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 50.
    Conclusions URI as access point to page An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 51.
    Conclusions Increased value: URIas access point to page and data An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 52.
    Conclusions Increased value: URIas access point to current & historical page and data An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 53.
    Memento wants tomake navigating the Web’s Past Easy http://www.mementoweb.org http://groups.google.com/group/memento-dev An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC
  • 54.
    References •  Tim Berners-Lee(1996,2000) Generic Resources. http://www.w3.org/DesignIssues/Generic.html •  Van de Sompel, H., Sanderson, R., Nelson, M.L., Balakireva, L., Ainsworth, S., Shankar, H. (2010) An HTTP-Based Versioning Mechanism for Linked Data. Proceedings of the 3rd Workshop on Linked Data on the Web. http://arxiv.org/abs/1003.3661 •  Sanderson, R., and Van de Sompel, H. (2010) Making Web Annotations Persistent over Time. Proceedings of the 10th ACM/IEEE-CS Joint Conference on Digital libraries. http://arxiv.org/abs/1003.2643 •  Van de Sompel, H., Nelson, M.L., Sanderson, R., Balakireva, L., Ainsworth, S., Shankar, H. (2009) Memento: Time Travel for the Web. http://arxiv.org/abs/0911.1112 An HTTP-Based Versioning Mechanism for Linked Data LDOW 2010, Raleigh, NC