[CSEE Talk] talk: David Wood on Enterprise Information Interoperability, 11am Fri Nov 9, UMBC

[Tim Finin]

                   Active PURLs: An architecture for
                enterprise information interoperability

                             Dr. David Wood
              Three Round Stones, http://3roundstones.com/

            11:00am Friday, 9 November 2012, ITE 325b, UMBC


The World Wide Web differed from other early hypertext systems in the
removal of "back links" (the ability of a hyperlinked object to link
back to a referring resource).  The removal of back links allowed the
scalability inherent in the Web's design, but sacrificed the knowledge
necessary to update links when content moved.  Persistent URLs (PURLs)
have been used on the Web since 1995 to provide an inexpensive and
partial solution to link updates via HTTP redirection: PURLs do not
change their URL, but they may change the target they redirect to.
Various iterations of the PURL concept have allowed Web addresses to
be updated, clients notified of permanent changes of address and the
provision of directions to metadata about a requested resource.

"Active" PURLs are a relatively new (2007) iteration of the PURL
concept that allow PURLs to actively participate in the creation of
data returned.  The Callimachus Project, an Open Source Linked Data
management system, now implements Active PURLs as a means to automate
the collection, transformation and provision of information from
distributed sources.  Active PURLs are implemented in Callimachus by
means of a PURL service, a new PURL type and an XML pipeline (XProc)
implementation.

This talk will introduce Active PURLs and describe how they may be
used to address long standing problems in enterprise architecture,
especially those of distributed information interoperability, by
facilitating a strong separation of concerns between data producers,
publishers, administrators, librarians and consumers.


Dr. David Wood has contributed to the evolution of the World Wide Web
since 1999, especially in the formation of standards and technologies
for the Semantic Web. He has architected key aspects of the Web to
include the Persistent Uniform Resource Locator (PURL) service and
several Semantic Web databases and frameworks.  David is co-chair of
the W3C RDF Working Group, co-chaired the Semantic Web Best Practices
and Deployment Working Group and is a member of the Semantic Web
Coordination Group. David has represented international organizations
in the evolution of Internet standards at the International Standards
Organization (ISO), the Internet Engineering Task Force (IETF) and the
World Wide Web Consortium. David is a founding and contributing member
of many Free/Libre/Open Source Software (FLOSS) projects, including
the Mulgara Semantic Store, Persistent URL (PURLs), Freemix and the
Callimachus Project.  He is the author of Programming Internet Email
(O'Reilly, 1999), editor of Linking Enterprise Data (Springer, 2010)
and Linking Government Data (Springer, 2011) and lead author of Linked
Data (Manning, anticipated 2013).