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Active PURLs: Stored Procedures for the Semantic Web – SemTech 2009 Audio


David Wood, Zepheira

Persistent URLs (PURLs) have operated on the Internet since 1995, and were re-architected and described at SemTech in 2008. Part of the re-architecture was to add semantic capabilities to PURLs so that metadata descriptions of a resource may be computationally separated from resources themselves. The Open Source community at maintains and extends the PURL code base.

High Precision Entity Extraction: A U.S. State Department Case Study – SemTech 2009 Audio


Joseph C. Wicentowski, U.S. Department of State
Dan McCreary, Dan McCreary and Associates

The U.S. State Department’s Office of the Historian has embarked on an ambitious effort to migrate its diplomatic history document archive from paper to an enriched electronic media for online consumption. We have extremely high standards for semantic precision and accuracy, due to Congressional mandates, which makes this unique resource useful to a broad audience, which includes scholars, government officials, and the general public. Furthermore, the new format allows us to repurpose our content and integrate it with "mashup" applications such as timelines and geographical map views.

Turbulence in the Linked Open Data and Ontology Clouds – SemTech 2009 Audio


Larry Lefkowitz, Cycorp, Inc.

Two major causes for optimism in the Semantic Technologies community are: 1) the rapid growth in the availability of open (linkable) structured datasets and associated ontologies, and 2) the belief that shared representation schemata will enable ontology integration and data sharing. Increasing pairwise linkages, as reflected especially at the dataset (instance) level by the growth of the Linked Open Data Cloud, offers evidence to support this optimism.

Panel: Business Models and Market Opportunities for Semantic Start-Ups – SemTech 2009 Audio


Greg Boutin, GrowthRoute Ventures
William Mougayar, Eqentia, Inc.
Fraser Kelton, AdaptiveBlue Inc

We will review the state of semantic technologies as a business, discuss the near future, and exchange suggestions with entrepreneurs in the space. In particular, marketing semantic applications presents a challenging paradox: attracting early-adopters by promoting Semantic technology alienates main stream consumers; and, marketing toward mainstream consumers creates disinterest with early-adopters.

Semantifying Social Networks – SemTech 2009 Audio


Paul Miller, The Cloud of Data
Nova Spivack, Radar Networks (
Daniela Barbosa, DataPortability Project/ Dow Jones
Fraser Kelton, AdaptiveBlue Inc
Stephen A. Leicht, Collexis Holdings Inc.
Amit Sheth, Kno.e.sis Center, Wright State U

Social networking continues to grow and evolve, expanding beyond the early adopters to attract usage in a wide variety of social, business and educational contexts. Community innovations such as the Twitter ‘hash tag’ demonstrate users’ desire to bring structure to their interactions with these networks, and a plethora of mashups make use of APIs to demonstrate the value of this structure. As yet more structure is added, and as the semantic richness grows, do these networks continue to become more powerful or does increased complexity run counter to the ways in which they are actually used?

SemTech 2009 Audio – Contextual Awareness


Alex Iskold, AdaptiveBlue
Jeremy Bentley, Smartlogic

Brian Crook, Cerebra

Semantic Search is often considered to be the holy grail of applying semantics to the web. But there is another set of applications that are gaining prominence – contextual. Several companies are applying semantic technologies to infer user context and then provide enhanced experience on the web.

Panel: Semantic Search Beyond RDF – SemTech 2009 Audio


Wen Ruan, TextWise
Ronald M Kaplan, Powerset division of bing
Christian F. Hempelmann, RiverGlass, Inc.
Riza Berkan, hakia

Semantic Search technology in the Semantic Web community is often understood as retrieval of knowledge from tagged data such as RDF sources, which require substantial formatting and markup to realize. Understanding unstructured query and document text and conducting searches according to their meaning is another approach, exemplified by linguistically rooted semantic matching, ontological knowledge-based semantic interpretation, and statistically based semantic similarity search.

Introducing OWL 2: A Panel and Community Discussion – SemTech 2009 Audio


Michael A Smith, Clark & Parsia LLC
Deborah L. McGuinness, Rensselaer Polytechnic Institute (RPI)
Ivan Herman, World Wide Web Consortium
Zhe Wu, Oracle Corp.
Ian Horrocks, Oxford University

OWL 2 is the first major revision of OWL, a key semantic technology standard, and is on-track to become a W3C standard in late Spring 2009, just in time for a panel-led community discussion about the opportunities provided by OWL 2.