SCMS - Semantic Content Management Systems for Enterprise Knowledge Management & News Mining » Events & Conferences

Price-winning SCMS Technology

Axel Ngonga — Mon, 14 Nov 2011 08:44:37 +0000

The paper “DBpedia SPARQL Benchmark – Performance Assessment with Real Queries on Real Data” won the best paper award at the world’s most prestigious Semantic Web conference, ISWC. LIMES, one of the technologies developed by InFAI during the course of the SCMS project, played a central role in the generation of this benchmark.The basic observation behind the paper was that most of the current SPARQL benchmarks were extracted from data that reflect relational schemas (small number of properties and classes) and not necessarily native RDF data. The aim of the paper was to generate a benchmark that addresses this drawback by mining the query log of one of the best reknown knowledge bases in the world, DBpedia . The resulting benchmark consists of 25 queries that can be used to assess the characteristics of triple stores when they are confronted with native RDF data. One of the main challenges during the mining process was to compute the similarity of queries in a time-efficient manner without loss of recall. The LIMES framework was used for this purpose and reduced the runtime of whole algorithm to less than 17% of the original runtime. The new version of LIMES (described here) can achieve the same computation orders of magnitude faster. Also remember to check out the new GUI.

Link on,

Axel

Indian-Summer School on Linked Data

Sören Auer — Tue, 07 Jun 2011 21:48:34 +0000

ISSLOD takes place in late summer from Sep 12-18, 2011 in Leipzig with hopefully still a lot of Indian Summer (i.e. Altweibersommer / Бабье лето) sunshine rays.

The Linked Data methodology is a light-weight approach to facilitate the transition from the document Web to the Web of Data and ultimately a Semantic Web. With a wide availability of Linked Data tools and knowledge bases, a steadily growing R&D community, industrial applications, the Linked Data paradigm already became crucial building block of the Web architecture.

ISSLOD is primarily intended for postgraduate (PhD or MSc) students, postdocs, and other young researchers investigating aspects related to the Semantic Data Web. The Summer School will also be open to senior researchers wishing to learn about Semantic Web issues related to their own fields of research.

For further details please visit: http://isslod.lod2.eu

ISSLOD is organized by the EU-FP7 project “LOD2 – Creating Knowledge out of Interlinked Data”. Lecturers comprise distinguished experts from LOD2 member organizations as well as invited speakers, the majority of which will – apart from their lectures – also be present for the duration of the school to interact with students. Interaction with senior researchers and establishing contacts within young researchers is a main focus of the school, which will be supported through social activities and an interactive, amicable atmosphere.

ISSLOD Application Deadline: 30 July 2011

Notifications: 5 August 2011

ISSLOD: 12-18 September 2011

There will be a limited number of student grants available. Details of the registration process will be announced on the Web site, after the application deadline. We will keep the registration fee low (175 EUR) and provide reasonable accomodation packages (less than 40 EUR per night) for students.

LIMES at IKS Workshop

Axel Ngonga — Mon, 06 Jun 2011 18:05:40 +0000

LIMES will be presented at the IKS workshop in Paris on July 6th. The upcoming version of LIMES (version 0.5) is up to 6 orders of magnitude faster than state-of-the-art software and offers tons of new functionality. More info here. The beta can be tested at http://limes.aksw.org. Stay tuned for more.

SCMS face2face meeting took place in Amsterdam 7-8 October 2010

Martin Kaltenböck — Mon, 11 Oct 2010 14:54:36 +0000

After the last face to face meeting in Vienna in January 2010 it has been about time to have the next SCMS project meeting to discuss the status of the work packages 2 (Knowledge Discovery),3 (Knowledge Engineering) and 4 (Knowledge Storage) as well as to plan the SCMS project workplan 2011 including work packages 5 (CMS implementation – Enterprise Knowledge Management – at the moment it si planned to implement the SCMS stack into the following systems: Drupal, Typo3, conX and Atlassian Confluence) and 6 (News Mining implementation).

This time the project team was invited by OpenLink Software that hosted the meeting in Amsterdam, the Netherlands.

In a two day face 2 face meeting the project team presented the status of the above mentioned work packages including tool demonstrations and hands on sessions as well as discussed required changes on architecture and components. Finally the procedure for the implementation of the SCMS technology stack into CMS solutions has been specified in detail.

Beside the final specification of A) extracting structured information out of unstructured content (using NLP technologies) as well as B) turning this structured information into contextual embedded knowledge using RDF and several semantic web technologies the 1st specification of C) the mechanisms of inferencing and knowledge querying has been specified to build reports/mash ups out of the available internal and external structured and unstructured information / data.

The afternoon of the second day was mainly destined for hands on sessions: these sessions really helped us to solve some important coding- & tool issues – so it was a good idea to manage this sessions beside presentations and specifications!

The meeting will be followed by a SCMS hackaton in Vienna in early December 2010 – the next face to face meeting will take place in May 2011.

At the meeting presented tools:

CARE of Digital Trowel, Israel
(see also article about: TheStockSonar.com in TechCrunch)
OntoWiki of InFAI, Germany
Virtuoso of OpenLink Software, UK
PoolParty of punkt. netServices, Austria
(see also new demo zone available)

Please do not hesitate to contact us if any questions on SCMS technologies and methodologies are arising!

Btw the 2 Use Cases (AIDA tours and reegle.info of REEEP) will be finalised and presented as BETA in late 2011 – so watch out!

I-Semantics 2010 Review

Tassilo Pellegrini — Tue, 21 Sep 2010 08:30:24 +0000

Very nice conference review of I-Semantics 2010 from Dan Leahu’s point of view: http://danleahu.com/series/isemantics/ Thanks Dean for the flowers & credits!

Stella Dextre Clarke & Alan Gilchrist about the “Future of Knowledge Organization on the Web”

Andreas Blumauer — Mon, 21 Jun 2010 06:00:10 +0000

Semantic Web Company (SWC) had the pleasure and the opportunity to talk with two internationally recognised experts in the fields of information management and knowledge organization: Alan Gilchrist and Stella Dextre Clarke. SWC asked some questions about the “Future of Knowledge Organization on the Web & Linked Data” on the occasion of an event of the same name organised by ISKO UK which will take place on September 14, 2010 in London. 1. Alan, you are one of the leading experts in the field of thesaurus construction. Organising knowledge in a (worldwide) Semantic Web is a rather young discipline compared to your domain. What do you think can the Semantic Web community learn from “traditional” thesaurus management and vice versa? You put inverted commas round the word traditional, but it might be more appropriate to put them round the word thesaurus! So long as words are used in information retrieval and in information sharing, different forms of structured vocabularies will be required, and many of the fundamental principles of thesaurus construction are still valid for their construction. Of course, the “traditional” thesaurus has mutated since the days when it was used only for controlled indexing and retrieval; and now, with the many enrichments possible it can be viewed as an ontology (in one of the definitions of this word). What remains a difficulty is to create a generalisable typology of associative relationships, though this is, of course, possible in relatively closed systems. In short, structured vocabularies with broadly thesaurus formats will be a necessary component in the web stack. 2. Stella, as a consultant you are specialized in the design and implementation of knowledge structures for information retrieval applications. In the last few months we have seen that SKOS can serve as a significant building block to link “traditional” thesaurus management to knowledge structures from the semantic web. Can you see that this development is market-driven, is there a significant growth of demand for solutions built around SKOS? This question sounds surprisingly sceptical about the growth of SKOS. I guess the dizzying speed of phenomena like Facebook and Twitter has fuelled expectations of tools springing up overnight like mushrooms, fully formed and ready to eat. But actually it takes time, not just for the tools to be fashioned, but for the potential market to develop an understanding of what they can do and what will happen next when they are used. Applications for SKOS are springing up all the time, as fast as people can grow the skills and vision to deploy them. At the moment the market, or shall we say the power-base, seems to be with the academic sector and allied not-for-profit organisations. This will spread progressively through the public to the private sector, as enterprises find ways of adapting their business models. The main hurdles to overcome could be intellectual property rights and the need for compilers of databases to keep earning their living. 3. Alan, constructing thesauri for the semantic web also means that one has to make the “open world assumption”. In which sense does this change the way to manage thesauri, keep them growing and assure quality? Can you see new, upcoming methodologies to do that? Everything changes with the “open world assumption”! Following on from my answer to the previous question, it seems clear that one manifestation of the thesaurus will be found in those systems that support interoperability, such as federated searching or metadata registries. Even with simple thesaurus management software, it is possible to construct a “master vocabulary” or “word bank” to support different applications within an enterprise; thereby promoting interoperability. More sophisticated software is already available (though not very widely); more will be needed and, doubtless, will be created. A more formal answer to both questions will be found in a new standard – ISO 25964, currently being prepared on the basis of BS 8723. The two fundamental features of these two standards are (1) the thesaurus as a theoretical and practical basis for the construction of structured vocabularies for information retieval and (2) the growing and vital need for interoperability between systems and the intelligent mapping of the vocabularies used by those systems. 4. Stella, just recently at ESWC 2010, Sean Bechhofer was asked during his keynote why there are so few SKOS tools on the market. What do you think are the reasons for this? Are there still shortcomings of the SKOS specification compared to other existing thesaurus standards? (see also: http://www.eswc2010.org/program-menu/keynote-speakers/155-sean-bechhofer & http://www.slideshare.net/seanb/skos-past-present-and-future ) Regarding the speed of development, see my reply above. As to shortcomings, did you note in one of Bechhofer’s slides: “Standardisation is necessarily a compromise: Everyone equally unhappy = success!” The SKOS development team took a conscious decision to keep the schema sufficiently simple that it could be applicable to as many different types of KOS as possible. On the downside, this means SKOS is unsatisfactory for conveying sophisticated features of some thesauri and classification schemes. But by keeping the entry barrier low, more widespread use has been encouraged. By way of illustration, compare SKOS with the data model and XML schema of BS 8723. This schema is comparatively specialized, with the aim of enabling exchange of any thesaurus carrying any or all of the features recommended in the standard. And incidentally, this data model and schema will have some further capabilities added when published in the forthcoming standard ISO 25964. SKOS does not provide for a number of features in these standards (such as compound equivalence). But the schemas in BS 8723 and ISO 25964 are designed for thesaurus developers to share their work, rather than for easy publication on the Web, and will never have so many users or associated tools as SKOS. So I believe that SKOS has done well to accept compromises that encourage generalisation although they might not suit some specialists. That said, I do regret one of its weaknesses in the context of mapping. Compound equivalence mappings (that is to say, where Concept A in one vocabulary maps to a combination of Concepts B and C in another) are very commonly needed when extending a search across multiple databases, and the SKOS mapping properties do not currently allow for them. Perhaps there will be some provision in future? 5. Stella, Alan, in September ISKO UK will organise an event on “The Future of Knowledge Organisation on the Web”. “Linked Data” seems to be a promising approach to organise knowledge in large scale environments. Could you imagine that SKOS as a small subset of semantic web specifications will play a central role in this environment since it is quite intuitively comprehensible by virtually any knowledge worker or do you rather think SKOS is too simple (or too complex)? (see also: http://poolparty.punkt.at/using-skos-as-an-interface-to-the-linked-data-cloud ) Stella: Of course SKOS will have a central role (whether or not every knowledge worker finds it as intuitive as you suppose). “Linked Data” will find even wider applicability. ISKO-UK (the organiser of the meeting in London on 14 September) has a mission not just to spread the word about both these technologies, but to build bridges between the several communities who must share their expertise and data to build more exciting applications. We’re expecting an audience of over 100 at this low-cost event. Alan: Yes, of course, just as all the tools in the web stack will be necessary if semantic web technologies are to be effective. But it is obvious that we are dealing with complexities of a higher order than ever before. Any structured vocabulary is an “artificial language” which, while acknowledging many aspects of theoretical linguistics is forced to be pragmatic in its construction. Consequently, it would not be surprising if SKOS is seen to be “catching up”, and this became apparent in the work of BS 8723 when thesaurus models using UML were being constructed. There remains much work to be done on all fronts. Stella Dextre Clarke is an independent consultant specializing in the design and implementation of thesauri and other knowledge organization structures. She currently leads ISO NP 25964, the project to update and revise the international standards for thesauri. Previously she was the Convenor of the Working Group which developed BS 8723. In 2006 she won the Tony Kent Strix Award for outstanding achievement in information retrieval, in recognition for her development work on IPSV (Integrated Public Sector Vocabulary), as well as on the vocabulary standards. She is a Fellow of the Chartered Institute of Library and Information Professionals. Alan Gilchrist has been a consultant for many years in the fields of information management and information architecture, specialising in the vocabulary aspects of information retrieval. He is co-author, with Jean Aitchison and David Bawden of Thesaurus Construction and Use, now in its fourth edition. In 1979 he founded and edited the Journal of Information Science, and is now Editor Emeritus. He has an Honorary Degree (D. Litt.) from the University of Brighton and is an Honorary Fellow of the Chartered Institute of Librarians and Information Professionals.

AKSW at ESWC

Sören Auer — Wed, 02 Jun 2010 12:49:42 +0000

Extended Semantic Web Conference started yesterday in Hersonissos, Crete. AKSW is involved in this years ESWC in various ways: We co-organized the 6th Workshop on Scripting and Development (SFSW10) probably for the last time this year at ESWC, since the original aim of promoting more light-weight, pragmatic semantic web applications of the SFSW workshop series became now rather mainstream. Sören was one of the panelists of the panel on “Linked Data: Now what?”. With the two papers “LESS - Template-Based Syndication and Presentation of Linked Data” and “Improving the Performance of Semantic Web Applications with SPARQL Query Result Caching” AKSW is also well represented in the main scientific conference programme.