-
Haslhofer, B.: Uniform SPARQL access to interlinked (digital library) sources (2007)
0.02
0.019636784 = product of:
0.039273567 = sum of:
0.039273567 = product of:
0.05891035 = sum of:
0.009313605 = weight(_text_:a in 541) [ClassicSimilarity], result of:
0.009313605 = score(doc=541,freq=6.0), product of:
0.052761257 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.045758117 = queryNorm
0.17652355 = fieldWeight in 541, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0625 = fieldNorm(doc=541)
0.049596746 = weight(_text_:22 in 541) [ClassicSimilarity], result of:
0.049596746 = score(doc=541,freq=2.0), product of:
0.16023713 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045758117 = queryNorm
0.30952093 = fieldWeight in 541, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=541)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- In this presentation, we therefore focus on a solution for providing uniform access to Digital Libraries and other online services. In order to enable uniform query access to heterogeneous sources, we must provide metadata interoperability in a way that a query language - in this case SPARQL - can cope with the incompatibility of the metadata in various sources without changing their already existing information models.
- Date
- 26.12.2011 13:22:46
-
Mitchell, J.S.; Zeng, M.L.; Zumer, M.: Modeling classification systems in multicultural and multilingual contexts (2012)
0.02
0.01943623 = product of:
0.03887246 = sum of:
0.03887246 = product of:
0.05830869 = sum of:
0.0057033943 = weight(_text_:a in 1967) [ClassicSimilarity], result of:
0.0057033943 = score(doc=1967,freq=4.0), product of:
0.052761257 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.045758117 = queryNorm
0.10809815 = fieldWeight in 1967, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046875 = fieldNorm(doc=1967)
0.052605297 = weight(_text_:22 in 1967) [ClassicSimilarity], result of:
0.052605297 = score(doc=1967,freq=4.0), product of:
0.16023713 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045758117 = queryNorm
0.32829654 = fieldWeight in 1967, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=1967)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- This paper reports on the second part of an initiative of the authors on researching classification systems with the conceptual model defined by the Functional Requirements for Subject Authority Data (FRSAD) final report. In an earlier study, the authors explored whether the FRSAD conceptual model could be extended beyond subject authority data to model classification data. The focus of the current study is to determine if classification data modeled using FRSAD can be used to solve real-world discovery problems in multicultural and multilingual contexts. The paper discusses the relationships between entities (same type or different types) in the context of classification systems that involve multiple translations and /or multicultural implementations. Results of two case studies are presented in detail: (a) two instances of the DDC (DDC 22 in English, and the Swedish-English mixed translation of DDC 22), and (b) Chinese Library Classification. The use cases of conceptual models in practice are also discussed.
- Type
- a
-
Heflin, J.; Hendler, J.: Semantic interoperability on the Web (2000)
0.02
0.017602425 = product of:
0.03520485 = sum of:
0.03520485 = product of:
0.05280727 = sum of:
0.009410121 = weight(_text_:a in 759) [ClassicSimilarity], result of:
0.009410121 = score(doc=759,freq=8.0), product of:
0.052761257 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.045758117 = queryNorm
0.17835285 = fieldWeight in 759, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0546875 = fieldNorm(doc=759)
0.04339715 = weight(_text_:22 in 759) [ClassicSimilarity], result of:
0.04339715 = score(doc=759,freq=2.0), product of:
0.16023713 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045758117 = queryNorm
0.2708308 = fieldWeight in 759, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=759)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- XML will have a profound impact on the way data is exchanged on the Internet. An important feature of this language is the separation of content from presentation, which makes it easier to select and/or reformat the data. However, due to the likelihood of numerous industry and domain specific DTDs, those who wish to integrate information will still be faced with the problem of semantic interoperability. In this paper we discuss why this problem is not solved by XML, and then discuss why the Resource Description Framework is only a partial solution. We then present the SHOE language, which we feel has many of the features necessary to enable a semantic web, and describe an existing set of tools that make it easy to use the language.
- Date
- 11. 5.2013 19:22:18
- Type
- a
-
Hafner, R.; Schelling, B.: Automatisierung der Sacherschließung mit Semantic Web Technologie (2015)
0.01
0.014465718 = product of:
0.028931435 = sum of:
0.028931435 = product of:
0.0867943 = sum of:
0.0867943 = weight(_text_:22 in 8365) [ClassicSimilarity], result of:
0.0867943 = score(doc=8365,freq=2.0), product of:
0.16023713 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045758117 = queryNorm
0.5416616 = fieldWeight in 8365, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=8365)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Date
- 22. 6.2015 16:08:38
-
Bittner, T.; Donnelly, M.; Winter, S.: Ontology and semantic interoperability (2006)
0.01
0.01374349 = product of:
0.02748698 = sum of:
0.02748698 = product of:
0.04123047 = sum of:
0.004032909 = weight(_text_:a in 4820) [ClassicSimilarity], result of:
0.004032909 = score(doc=4820,freq=2.0), product of:
0.052761257 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.045758117 = queryNorm
0.07643694 = fieldWeight in 4820, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046875 = fieldNorm(doc=4820)
0.03719756 = weight(_text_:22 in 4820) [ClassicSimilarity], result of:
0.03719756 = score(doc=4820,freq=2.0), product of:
0.16023713 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045758117 = queryNorm
0.23214069 = fieldWeight in 4820, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=4820)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 3.12.2016 18:39:22
- Type
- a
-
Si, L.E.; O'Brien, A.; Probets, S.: Integration of distributed terminology resources to facilitate subject cross-browsing for library portal systems (2009)
0.01
0.013693414 = product of:
0.027386827 = sum of:
0.027386827 = product of:
0.04108024 = sum of:
0.010082272 = weight(_text_:a in 3628) [ClassicSimilarity], result of:
0.010082272 = score(doc=3628,freq=18.0), product of:
0.052761257 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.045758117 = queryNorm
0.19109234 = fieldWeight in 3628, product of:
4.2426405 = tf(freq=18.0), with freq of:
18.0 = termFreq=18.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0390625 = fieldNorm(doc=3628)
0.030997967 = weight(_text_:22 in 3628) [ClassicSimilarity], result of:
0.030997967 = score(doc=3628,freq=2.0), product of:
0.16023713 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045758117 = queryNorm
0.19345059 = fieldWeight in 3628, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=3628)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- Purpose: To develop a prototype middleware framework between different terminology resources in order to provide a subject cross-browsing service for library portal systems. Design/methodology/approach: Nine terminology experts were interviewed to collect appropriate knowledge to support the development of a theoretical framework for the research. Based on this, a simplified software-based prototype system was constructed incorporating the knowledge acquired. The prototype involved mappings between the computer science schedule of the Dewey Decimal Classification (which acted as a spine) and two controlled vocabularies UKAT and ACM Computing Classification. Subsequently, six further experts in the field were invited to evaluate the prototype system and provide feedback to improve the framework. Findings: The major findings showed that given the large variety of terminology resources distributed on the web, the proposed middleware service is essential to integrate technically and semantically the different terminology resources in order to facilitate subject cross-browsing. A set of recommendations are also made outlining the important approaches and features that support such a cross browsing middleware service.
- Content
- This paper is a pre-print version presented at the ISKO UK 2009 conference, 22-23 June, prior to peer review and editing. For published proceedings see special issue of Aslib Proceedings journal.
-
Dini, L.: CACAO : multilingual access to bibliographic records (2007)
0.01
0.012399187 = product of:
0.024798375 = sum of:
0.024798375 = product of:
0.07439512 = sum of:
0.07439512 = weight(_text_:22 in 126) [ClassicSimilarity], result of:
0.07439512 = score(doc=126,freq=2.0), product of:
0.16023713 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045758117 = queryNorm
0.46428138 = fieldWeight in 126, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=126)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Content
- Vortrag anlässlich des Workshops: "Extending the multilingual capacity of The European Library in the EDL project Stockholm, Swedish National Library, 22-23 November 2007".
-
Landry, P.: MACS: multilingual access to subject and link management : Extending the Multilingual Capacity of TEL in the EDL Project (2007)
0.01
0.010332656 = product of:
0.020665312 = sum of:
0.020665312 = product of:
0.061995935 = sum of:
0.061995935 = weight(_text_:22 in 1287) [ClassicSimilarity], result of:
0.061995935 = score(doc=1287,freq=2.0), product of:
0.16023713 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045758117 = queryNorm
0.38690117 = fieldWeight in 1287, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=1287)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Content
- Vortrag anlässlich des Workshops: "Extending the multilingual capacity of The European Library in the EDL project Stockholm, Swedish National Library, 22-23 November 2007".
-
Manguinhas, H.; Charles, V.; Isaac, A.; Miles, T.; Lima, A.; Neroulidis, A.; Ginouves, V.; Atsidis, D.; Hildebrand, M.; Brinkerink, M.; Gordea, S.: Linking subject labels in cultural heritage metadata to MIMO vocabulary using CultuurLink (2016)
0.01
0.009533988 = product of:
0.019067977 = sum of:
0.019067977 = product of:
0.028601965 = sum of:
0.009878568 = weight(_text_:a in 3107) [ClassicSimilarity], result of:
0.009878568 = score(doc=3107,freq=12.0), product of:
0.052761257 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.045758117 = queryNorm
0.18723148 = fieldWeight in 3107, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046875 = fieldNorm(doc=3107)
0.018723397 = weight(_text_:h in 3107) [ClassicSimilarity], result of:
0.018723397 = score(doc=3107,freq=2.0), product of:
0.113683715 = queryWeight, product of:
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.045758117 = queryNorm
0.16469726 = fieldWeight in 3107, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.046875 = fieldNorm(doc=3107)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- The Europeana Sounds project aims to increase the amount of cultural audio content in Europeana. It also strongly focuses on enriching the metadata records that are aggregated by Europeana. To provide metadata to Europeana, Data Providers are asked to convert their records from the format and model they use internally to a specific profile of the Europeana Data Model (EDM) for sound resources. These metadata include subjects, which typically use a vocabulary internal to each partner.
- Type
- a
-
Mayr, P.; Walter, A.-K.: Zum Stand der Heterogenitätsbehandlung in vascoda : Bestandsaufnahme und Ausblick (2007)
0.01
0.008849675 = product of:
0.01769935 = sum of:
0.01769935 = product of:
0.026549023 = sum of:
0.0047050603 = weight(_text_:a in 59) [ClassicSimilarity], result of:
0.0047050603 = score(doc=59,freq=2.0), product of:
0.052761257 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.045758117 = queryNorm
0.089176424 = fieldWeight in 59, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0546875 = fieldNorm(doc=59)
0.021843962 = weight(_text_:h in 59) [ClassicSimilarity], result of:
0.021843962 = score(doc=59,freq=2.0), product of:
0.113683715 = queryWeight, product of:
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.045758117 = queryNorm
0.19214681 = fieldWeight in 59, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.0546875 = fieldNorm(doc=59)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Content
- Vortrag anlässlich des 96. Deutscher Bibliothekartag, Leipzig, 2007. - Vgl. auch den Bericht: Fiala, S.: Deutscher Bibliothekartag Leipzig 2007: Sacherschließung - Informationsdienstleistung. In: Mitt. VOEB 60(2007) H.2, S.44-48.
-
Hinrichs, I.; Milmeister, G.; Schäuble, P.; Steenweg, H.: Computerunterstützte Sacherschließung mit dem Digitalen Assistenten (DA-2) (2016)
0.01
0.008849675 = product of:
0.01769935 = sum of:
0.01769935 = product of:
0.026549023 = sum of:
0.0047050603 = weight(_text_:a in 3563) [ClassicSimilarity], result of:
0.0047050603 = score(doc=3563,freq=2.0), product of:
0.052761257 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.045758117 = queryNorm
0.089176424 = fieldWeight in 3563, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0546875 = fieldNorm(doc=3563)
0.021843962 = weight(_text_:h in 3563) [ClassicSimilarity], result of:
0.021843962 = score(doc=3563,freq=2.0), product of:
0.113683715 = queryWeight, product of:
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.045758117 = queryNorm
0.19214681 = fieldWeight in 3563, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.0546875 = fieldNorm(doc=3563)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Type
- a
-
Faro, S.; Francesconi, E.; Marinai, E.; Sandrucci, V.: Report on execution and results of the interoperability tests (2008)
0.01
0.008266125 = product of:
0.01653225 = sum of:
0.01653225 = product of:
0.049596746 = sum of:
0.049596746 = weight(_text_:22 in 7411) [ClassicSimilarity], result of:
0.049596746 = score(doc=7411,freq=2.0), product of:
0.16023713 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045758117 = queryNorm
0.30952093 = fieldWeight in 7411, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=7411)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Date
- 7.11.2008 10:40:22
-
Faro, S.; Francesconi, E.; Sandrucci, V.: Thesauri KOS analysis and selected thesaurus mapping methodology on the project case-study (2007)
0.01
0.008266125 = product of:
0.01653225 = sum of:
0.01653225 = product of:
0.049596746 = sum of:
0.049596746 = weight(_text_:22 in 2227) [ClassicSimilarity], result of:
0.049596746 = score(doc=2227,freq=2.0), product of:
0.16023713 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045758117 = queryNorm
0.30952093 = fieldWeight in 2227, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=2227)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Date
- 7.11.2008 10:40:22
-
Chen, H.: Semantic research for digital libraries (1999)
0.01
0.008142265 = product of:
0.01628453 = sum of:
0.01628453 = product of:
0.024426792 = sum of:
0.0057033943 = weight(_text_:a in 1247) [ClassicSimilarity], result of:
0.0057033943 = score(doc=1247,freq=4.0), product of:
0.052761257 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.045758117 = queryNorm
0.10809815 = fieldWeight in 1247, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046875 = fieldNorm(doc=1247)
0.018723397 = weight(_text_:h in 1247) [ClassicSimilarity], result of:
0.018723397 = score(doc=1247,freq=2.0), product of:
0.113683715 = queryWeight, product of:
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.045758117 = queryNorm
0.16469726 = fieldWeight in 1247, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.046875 = fieldNorm(doc=1247)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- In this era of the Internet and distributed, multimedia computing, new and emerging classes of information systems applications have swept into the lives of office workers and people in general. From digital libraries, multimedia systems, geographic information systems, and collaborative computing to electronic commerce, virtual reality, and electronic video arts and games, these applications have created tremendous opportunities for information and computer science researchers and practitioners. As applications become more pervasive, pressing, and diverse, several well-known information retrieval (IR) problems have become even more urgent. Information overload, a result of the ease of information creation and transmission via the Internet and WWW, has become more troublesome (e.g., even stockbrokers and elementary school students, heavily exposed to various WWW search engines, are versed in such IR terminology as recall and precision). Significant variations in database formats and structures, the richness of information media (text, audio, and video), and an abundance of multilingual information content also have created severe information interoperability problems -- structural interoperability, media interoperability, and multilingual interoperability.
- Type
- a
-
Karg, H.: CrissCross: was bringt es dem Nutzer? (2010)
0.01
0.007281321 = product of:
0.014562642 = sum of:
0.014562642 = product of:
0.043687925 = sum of:
0.043687925 = weight(_text_:h in 5514) [ClassicSimilarity], result of:
0.043687925 = score(doc=5514,freq=2.0), product of:
0.113683715 = queryWeight, product of:
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.045758117 = queryNorm
0.38429362 = fieldWeight in 5514, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.109375 = fieldNorm(doc=5514)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
-
Si, L.: Encoding formats and consideration of requirements for mapping (2007)
0.01
0.007232859 = product of:
0.014465718 = sum of:
0.014465718 = product of:
0.04339715 = sum of:
0.04339715 = weight(_text_:22 in 540) [ClassicSimilarity], result of:
0.04339715 = score(doc=540,freq=2.0), product of:
0.16023713 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045758117 = queryNorm
0.2708308 = fieldWeight in 540, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=540)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Date
- 26.12.2011 13:22:27
-
Isaac, A.: Aligning thesauri for an integrated access to Cultural Heritage Resources (2007)
0.01
0.0069676405 = product of:
0.013935281 = sum of:
0.013935281 = product of:
0.02090292 = sum of:
0.00998094 = weight(_text_:a in 553) [ClassicSimilarity], result of:
0.00998094 = score(doc=553,freq=36.0), product of:
0.052761257 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.045758117 = queryNorm
0.18917176 = fieldWeight in 553, product of:
6.0 = tf(freq=36.0), with freq of:
36.0 = termFreq=36.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.02734375 = fieldNorm(doc=553)
0.010921981 = weight(_text_:h in 553) [ClassicSimilarity], result of:
0.010921981 = score(doc=553,freq=2.0), product of:
0.113683715 = queryWeight, product of:
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.045758117 = queryNorm
0.096073404 = fieldWeight in 553, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.02734375 = fieldNorm(doc=553)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- Currently, a number of efforts are being carried out to integrate collections from different institutions and containing heterogeneous material. Examples of such projects are The European Library [1] and the Memory of the Netherlands [2]. A crucial point for the success of these is the availability to provide a unified access on top of the different collections, e.g. using one single vocabulary for querying or browsing the objects they contain. This is made difficult by the fact that the objects from different collections are often described using different vocabularies - thesauri, classification schemes - and are therefore not interoperable at the semantic level. To solve this problem, one can turn to semantic links - mappings - between the elements of the different vocabularies. If one knows that a concept C from a vocabulary V is semantically equivalent to a concept to a concept D from vocabulary W, then an appropriate search engine can return all the objects that were indexed against D for a query for objects described using C. We thus have an access to other collections, using a single one vocabulary. This is however an ideal situation, and hard alignment work is required to reach it. Several projects in the past have tried to implement such a solution, like MACS [3] and Renardus [4]. They have demonstrated very interesting results, but also highlighted the difficulty of aligning manually all the different vocabularies involved in practical cases, which sometimes contain hundreds of thousands of concepts. To alleviate this problem, a number of tools have been proposed in order to provide with candidate mappings between two input vocabularies, making alignment a (semi-) automatic task. Recently, the Semantic Web community has produced a lot of these alignment tools'. Several techniques are found, depending on the material they exploit: labels of concepts, structure of vocabularies, collection objects and external knowledge sources. Throughout our presentation, we will present a concrete heterogeneity case where alignment techniques have been applied to build a (pilot) browser, developed in the context of the STITCH project [5]. This browser enables a unified access to two collections of illuminated manuscripts, using the description vocabulary used in the first collection, Mandragore [6], or the one used by the second, Iconclass [7]. In our talk, we will also make the point for using unified representations the vocabulary semantic and lexical information. Additionally to ease the use of the alignment tools that have these vocabularies as input, turning to a standard representation format helps designing applications that are more generic, like the browser we demonstrate. We give pointers to SKOS [8], an open and web-enabled format currently developed by the Semantic Web community.
References [1] http:// www.theeuropeanlibrary.org [2] http://www.geheugenvannederland.nl [3] http://macs.cenl.org [4] Day, M., Koch, T., Neuroth, H.: Searching and browsing multiple subject gateways in the Renardus service. In Proceedings of the RC33 Sixth International Conference on Social Science Methodology, Amsterdam , 2005. [5] http://stitch.cs.vu.nl [6] http://mandragore.bnf.fr [7] http://www.iconclass.nl [8] www.w3.org/2004/02/skos/ 1 The Semantic Web vision supposes sharing data using different conceptualizations (ontologies), and therefore implies to tackle the semantic interoperability problem
-
Euzenat, J.; Bach, T.Le; Barrasa, J.; Bouquet, P.; Bo, J.De; Dieng, R.; Ehrig, M.; Hauswirth, M.; Jarrar, M.; Lara, R.; Maynard, D.; Napoli, A.; Stamou, G.; Stuckenschmidt, H.; Shvaiko, P.; Tessaris, S.; Acker, S. Van; Zaihrayeu, I.: State of the art on ontology alignment (2004)
0.01
0.006849361 = product of:
0.013698722 = sum of:
0.013698722 = product of:
0.020548083 = sum of:
0.008065818 = weight(_text_:a in 172) [ClassicSimilarity], result of:
0.008065818 = score(doc=172,freq=18.0), product of:
0.052761257 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.045758117 = queryNorm
0.15287387 = fieldWeight in 172, product of:
4.2426405 = tf(freq=18.0), with freq of:
18.0 = termFreq=18.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.03125 = fieldNorm(doc=172)
0.012482265 = weight(_text_:h in 172) [ClassicSimilarity], result of:
0.012482265 = score(doc=172,freq=2.0), product of:
0.113683715 = queryWeight, product of:
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.045758117 = queryNorm
0.10979818 = fieldWeight in 172, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.03125 = fieldNorm(doc=172)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- In this document we provide an overall view of the state of the art in ontology alignment. It is organised as a description of the need for ontology alignment, a presentation of the techniques currently in use for ontology alignment and a presentation of existing systems. The state of the art is not restricted to any discipline and consider as some form of ontology alignment the work made on schema matching within the database area for instance. Heterogeneity problems on the semantic web can be solved, for some of them, by aligning heterogeneous ontologies. This is illustrated through a number of use cases of ontology alignment. Aligning ontologies consists of providing the corresponding entities in these ontologies. This process is precisely defined in deliverable D2.2.1. The current deliverable presents the many techniques currently used for implementing this process. These techniques are classified along the many features that can be found in ontologies (labels, structures, instances, semantics). They resort to many different disciplines such as statistics, machine learning or data analysis. The alignment itself is obtained by combining these techniques towards a particular goal (obtaining an alignment with particular features, optimising some criterion). Several combination techniques are also presented. Finally, these techniques have been experimented in various systems for ontology alignment or schema matching. Several such systems are presented briefly in the last section and characterized by the above techniques they rely on. The conclusion is that many techniques are available for achieving ontology alignment and many systems have been developed based on these techniques. However, few comparisons and few integration is actually provided by these implementations. This deliverable serves as a basis for considering further action along these two lines. It provide a first inventory of what should be evaluated and suggests what evaluation criterion can be used.
- Content
- This document is part of a research project funded by the IST Programme of the Commission of the European Communities as project number IST-2004-507482.
-
Galinski, C.: Fragen der semantischen Interoperabilität brechen jetzt überall auf (o.J.)
0.01
0.0061995937 = product of:
0.012399187 = sum of:
0.012399187 = product of:
0.03719756 = sum of:
0.03719756 = weight(_text_:22 in 4183) [ClassicSimilarity], result of:
0.03719756 = score(doc=4183,freq=2.0), product of:
0.16023713 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045758117 = queryNorm
0.23214069 = fieldWeight in 4183, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=4183)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Date
- 22. 1.2011 10:16:32
-
Schubert, C.; Kinkeldey, C.; Reich, H.: Handbuch Datenbankanwendung zur Wissensrepräsentation im Verbundprojekt DeCOVER (2006)
0.00
0.0041607553 = product of:
0.008321511 = sum of:
0.008321511 = product of:
0.02496453 = sum of:
0.02496453 = weight(_text_:h in 4256) [ClassicSimilarity], result of:
0.02496453 = score(doc=4256,freq=2.0), product of:
0.113683715 = queryWeight, product of:
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.045758117 = queryNorm
0.21959636 = fieldWeight in 4256, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4844491 = idf(docFreq=10020, maxDocs=44218)
0.0625 = fieldNorm(doc=4256)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
