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69 | |
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70 | \title{SMC4LRT - Master Outline} |
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71 | \author{Matej Durco} |
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72 | %\date{} % Activate to display a given date or no date (if empty), |
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73 | % otherwise the current date is printed |
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74 | |
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75 | \begin{document} |
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76 | \maketitle |
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77 | |
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78 | \tableofcontents |
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79 | |
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80 | \section{Introduction} |
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81 | |
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82 | Title: Semantic Mapping (Component) for Language Resources |
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83 | |
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84 | \subsection{Main Goal} |
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85 | |
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86 | |
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87 | a) define/use semantic relations between categories (RelationRegistry) |
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88 | b) employ ontological resources to enhance search in the dataset (SemanticSearch) |
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89 | c) specify a translation instructions for expressing dataset in rdf (LinkedData) |
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90 | |
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91 | Propose a semantic mapping component for Language Resources and Technology within the context of a federated infrastructure (being constructed in the project CLARIN). |
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92 | Due to the great diversity of resources and research tasks a full alignement is not achievable. Rather the focus shall be on "soft", dynamic mapping, investigating the possibilities/methods to enable the users to control the mapping with respect to their current task, |
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93 | essentially being able to actively manipulate the recall/precision ratio of their searches. This entails the examination of user interaction with and visualization of the relevant information in the user interface and enabling the user to act upon it. |
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94 | |
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95 | Example |
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96 | |
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97 | |
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98 | \subsection{Method} |
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99 | We start with examining the existing Data and describing the evolving Infrastructure. |
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100 | Then we formulate the task/function of Semantic Mapping and the requirements within the defined context, |
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101 | followed by a design proposal for an appropriate component fitting within the infrastructure. |
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102 | In a prototype we want to deliver a proof of the concept, |
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103 | combined with an evaluation to verify the claims of fitness for the purpose. |
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104 | This evaluation is twofold. It shall verify the ability of the system to support dynamic mapping based on a set of test queries |
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105 | and secondly the usability of the ui-controls. |
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106 | |
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107 | +? Identify hooks into LOD? |
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108 | |
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109 | \subsection{Expected Results} |
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110 | |
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111 | \begin{itemize} |
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112 | \item [Specification] definition of a mapping mechanism |
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113 | \item [Prototype] proof of concept implementation |
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114 | \item [Evaluation] evaluation results of querying the dataset comparing traditional search and semantic search |
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115 | \item [LinkedData] translation of the source dataset to RDF-based format with links into existing datasets/ontologies/knowledgebases |
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116 | |
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117 | \end{itemize} |
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118 | |
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119 | |
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120 | \subsection{State of the Art} |
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121 | |
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122 | \begin{itemize} |
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123 | \item VLO - Virtual Language Observatory \url{http://www.clarin.eu/vlo/}, \cite{VanUytvanck2010} |
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124 | \item Ontology and Lexicon \cite{Hirst2009} |
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125 | \item LingInfo/Lemon \cite{Buitelaar2009} |
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126 | \end{itemize} |
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127 | |
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128 | \subsection{Keywords} |
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129 | |
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130 | Metadata interoperability, Ontology Mapping, Schema mapping, Crosswalk, Similarity measures, LinkedData |
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131 | Fuzzy Search, Visual Search? |
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132 | |
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133 | Language Resources and Technology, LRT/NLP/HLT |
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134 | |
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135 | Ontology Visualization |
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136 | |
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137 | Federated Search, Distributed Content Search |
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138 | (ILS - Integrated Library Systems) |
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139 | |
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140 | |
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141 | \section{Related Work} |
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142 | |
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143 | \subsection{Language Resources and Technology} |
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144 | |
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145 | While in the Digital Libraries community a consolidation generally already happened and big federated networks of digital libary repository are set up, in the field of Language Resource and Technology the landscape is still scattered, although meanwhile looking back at a decade of standardizing efforts. One main reason seems to be the complexity and diversity of the metadata associated with the resources, stemming for one from the wide range of resource types additionally complicated by dependence of different schools of thought. |
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146 | |
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147 | Need some number about the disparity in the field, number of institutes, resources, formats. |
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148 | |
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149 | This situation has been identified by the community and multiple standardization initiatives had been conducted/undertaken. This process seems to have gained a new momentum thanks to large Research Infrastructure Programmes introduced by European Commission, aimed at fostering Research communities developing large-scale pan-european common infrastructures. One key player in this development is the project CLARIN. |
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150 | |
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151 | \subsubsection{CLARIN} |
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152 | |
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153 | CLARIN - Common Language Resource and Technology Infrastructure - constituted by over 180 members from round 38 countries. The mission of this project is |
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154 | |
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155 | create a research infrastructure that makes language resources and technologies (LRT) available to scholars of all disciplines, especially SSH large-scale pan-European collaborative effort to create, coordinate and make language resources and technology available and readily useable |
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156 | |
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157 | This shall be accomplished by setting up a federated network of centers (with federated identity management) but mainly providing resources and services in an agreed upon / coherent / uniform / consistent /standardized manner. The foundation for this goal shall be the Common or Component Metadata infrastructure, a model that caters for flexible metadata profiles, allowing to accomodate existing schemas. |
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158 | |
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159 | The embedment in the CLARIN project brings about the context of Language Resources and HLT (Human Language Technology, aka NLP - Natural Language Processing) and SSH (Social Sciences and Humanities) as the primary target user-group of CLARIN. |
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160 | CLARIN/NLP for SSH |
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161 | |
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162 | \subsubsection{Standards} |
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163 | |
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164 | \begin{description} |
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165 | \item[ISO12620] Data Category Registry |
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166 | \item[LAF] Linguistic Annotation Framework |
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167 | \item[CMDI] - (DC, OLAC, IMDI, TEI) |
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168 | \end{description} |
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169 | |
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170 | \subsubsection{NLP MD Catalogues} |
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171 | |
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172 | \begin{description} |
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173 | \item[LAT, TLA] - Language Archiving Technology, now The Language Archive - provided by Max Planck Insitute for Psycholinguistics \url{http://www.mpi.nl/research/research-projects/language-archiving-technology} |
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174 | \item[OTA LR] Archiving Service provided by Oxford Text Archive \url{http://ota.oucs.ox.ac.uk/} |
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175 | \item[OLAC] |
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176 | \item[ELRA] |
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177 | \item[LDC] |
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178 | \item[DFKI/LT-World] |
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179 | \end{description} |
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180 | |
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181 | \subsection{Ontologies} |
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182 | |
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183 | \subsubsection{Word, Sense, Concept} |
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184 | |
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185 | Lexicon vs. Ontology |
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186 | Lexicon is a linguistic object an ontology is not.\cite{Hirst2009} We don't need to be that strict, but it shall be a guiding principle in this work to consider things (Datasets, Vocabularies, Resources) also along this dichotomy/polarity: Conceptual vs. Lexical. |
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187 | And while every Ontology has to have a lexical representation (canonically: rdfs:label, rdfs:comment, skos:*label), if we don't try to force observed objects into a binary classification, but consider a bias spectrum, we should be able to locate these along this spectrum. |
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188 | So the main focus of a typical ontology are the concepts ("conceptualization"), primarily language-independent. |
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189 | |
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190 | A special case are Linguistic Ontologies: isocat, GOLD, WALS.info |
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191 | ontologies conceptualizing the linguistic domain |
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192 | |
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193 | They are special in that ("ontologized") Lexicons refere to them to describe linguistic properties of the Lexical Entries, as opposed to linking to Domain Ontologies to anchor Senses/Meanings. |
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194 | Lexicalized Ontologies: LingInfo, lemon: LMF + isocat/GOLD + Domain Ontology |
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195 | |
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196 | Another special case are Controlled Vocabularies or Taxonomies/Classification Systems, let alone folksonomies, in that they identify terms and concepts/meanings, ie there is no explicit mapping between the language represenation and the concept, but rather the term is implicit carrier of the meaning/concept. |
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197 | So for example in the LCSH the surface realization of each subject-heading at the same time identifies the Concept ~. |
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198 | |
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199 | controlled vocabularies? |
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200 | |
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201 | |
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202 | \subsubsection{Semantic Web - Linked Data} |
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203 | |
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204 | \begin{description} |
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205 | \item[RDF/OWL] |
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206 | \item[SKOS] |
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207 | \end{description} |
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208 | |
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209 | \subsubsection{OntologyMapping} |
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210 | |
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211 | |
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212 | \subsection{Visualization} |
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213 | |
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214 | |
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215 | \subsection{FederatedSearch} |
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216 | |
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217 | \subsubsection{Standards} |
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218 | |
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219 | \begin{description} |
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220 | \item[Z39.50/SRU/SRW/CQL] LoC |
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221 | \item[OAI-PMH] |
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222 | \end{description} |
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223 | |
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224 | |
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225 | \subsubsection{(Digital) Libraries} |
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226 | |
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227 | |
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228 | General (Libraries, Federations): |
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229 | |
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230 | \begin{description} |
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231 | \item[OCLC] \url{http://www.oclc.org} |
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232 | world's biggest Library Federation |
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233 | \item[LoC] Library of Congress \url{http://www.loc.gov} |
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234 | \item[EU-Lib] European Library \url{http://www.theeuropeanlibrary.org/portal/organisation/handbook/accessing-collections\_ en.htm} |
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235 | \item[europeana] virtual European library - cross-domain portal \url{http://www.europeana.eu/portal/} |
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236 | \end{description} |
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237 | |
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238 | \subsubsection{Content Repositories} |
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239 | |
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240 | \begin{description} |
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241 | \item[PHAIDRA] Permanent Hosting, Archiving and Indexing of Digital Resources and Assets, provided by Vienna University \url{https://phaidra.univie.ac.at/} |
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242 | \item[eSciDoc] provided by MPG + FIZ Karlsruhe \url{https://www.escidoc.org/} |
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243 | \item[DRIVER] pan-European infrastructure of Digital Repositories \url{http://www.driver-repository.eu/} |
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244 | \item[OpenAIRE] - Open Acces Infrastructure for Research in Europe \url{http://www.openaire.eu/} |
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245 | \end{description} |
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246 | |
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247 | |
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248 | \subsubsection{(MD)search frameworks:} |
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249 | |
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250 | \begin{description} |
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251 | \item[Zebra/Z39.50] JZKit |
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252 | \item[Lucene/Solr] |
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253 | \item[eXist] - xml DB |
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254 | \end{description} |
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255 | |
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256 | \subsubsection{Content/Corpus Search} |
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257 | Corpus Search Systems |
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258 | \begin{description} |
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259 | \item[DDC] - text-corpus |
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260 | \item[manatee] - text-corpus |
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261 | \item[CQP] - text-corps |
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262 | \item[TROVA] - MM annotated resources |
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263 | \item[ELAN] - MM annotated resources (editor + search) |
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264 | \end{description} |
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265 | |
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266 | \subsection{Summary} |
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267 | |
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268 | \section{Definitions} |
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269 | We want to clarify or lay dowhn a few terms and definition, ie explanation of our understanding |
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270 | |
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271 | \begin{description} |
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272 | \item[Concept] sense, idea, philosophical problem, which we don't need to discuss here. For our purposes we say: Basic "entity" in an ontology? that of what an ontology is build |
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273 | \item[Ontology] "a explicit specification of a conceptualization" [cite!], but for us mainly a collection of concepts as opposed to lexicon, which is a collection of words. |
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274 | \item[Word] a lexical unit, a word in a language, something that has a surface Realization (writtenForm) and is a carrier of sense. so a Relation holds: hasSense(Word, Concept) |
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275 | \item[Lexicon] a collection of words, a (lexical) vocabulary |
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276 | \item[Vocabulary] an index providing mapping from Word (string) to Concept (uri) |
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277 | \item[(Data)Category] (almost) the same as Concept; Things like "Topic", "Genre", "Organization", "ResourceType" are instantiations of Category |
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278 | \item[ConceptualDomain] the Class of entities a Concept/Category denotes. For Organization it would be all (existing) organizations, CD(ResourceType)={Corpus, Lexicon, Document, Image, Video, ...}. Entities of the domain can itself be Categories (ResourceType:Image), but it can be also individuals (Organization University of Vienna) |
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279 | \item[Entity] |
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280 | \item[Resource] informational resource, in the context of CLARIN-Project mainly Language Resources (Corpus, Lexicon, Multimedia) |
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281 | \item[Metadata Description] description of some properties of a resource. MD-Record |
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282 | \item[Schema] - CMD-Profile |
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283 | \item[Annotation] |
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284 | |
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285 | |
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286 | \end{description} |
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287 | |
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288 | \section{Analysis} |
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289 | |
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290 | \subsection{Data landscape} |
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291 | |
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292 | Describe situation regarding the datasets and formats |
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293 | |
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294 | collections, profiles/Terms, ResourceTypes! |
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295 | |
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296 | DC, OLAC, |
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297 | ISLE/IMDI, CHILDES, TEI, EAF! |
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298 | (CES/XCES) |
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299 | |
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300 | \subsection{Infrastructure} |
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301 | |
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302 | CMDI \cite{Broeder2010} |
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303 | |
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304 | |
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305 | \subsection{Ontologies, Controlled Vocabularies, Knowledge Organizing Systems} |
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306 | |
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307 | |
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308 | \subsubsection{Classification Schemes, Taxonomies } |
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309 | LCSH, DDC |
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310 | |
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311 | |
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312 | \subsubsection{Other controlled Vocabularies} |
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313 | Tagsets: STTS |
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314 | Language codes ISO-639-1 |
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315 | |
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316 | \subsubsection{Domain Ontologies, Vocabularies} |
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317 | Organization-Lists |
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318 | LT-World !? |
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319 | |
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320 | |
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321 | \subsection{Use Cases} |
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322 | |
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323 | \begin{itemize} |
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324 | |
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325 | \item MD Search employing Semantic Mapping |
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326 | \item MD Search employing Fuzzy Search |
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327 | \item Content Search |
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328 | \item Combined MEtadata Content Search |
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329 | \item Visualization of the Results - charts on facets/dimensions |
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330 | |
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331 | \item Create and publish Virtual Collection based on complex Search (intensional/extensional) |
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332 | \item Let Create ad-hoc corpus |
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333 | \end{itemize} |
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334 | |
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335 | \section{Semantic Mapping} |
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336 | |
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337 | |
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338 | \subsection{Profiles to Data Categories} |
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339 | CMD:Profile.Comp.Elem -> DatCat |
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340 | |
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341 | |
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342 | \subsection{Semantic Relations between (Data)Categories} |
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343 | |
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344 | Relation Registry |
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345 | |
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346 | !check DCR-RR/Odijk2010 -follow up |
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347 | !Cf. Erhard Hinrichs 2009 |
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348 | |
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349 | |
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350 | \subsection{Mapping from strings to Entities} |
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351 | |
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352 | Based on the textual values in the Metadata-descriptions find matching entities in selected Ontologies. |
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353 | |
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354 | Identify related ontologies: |
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355 | LT-World \cite{Joerg2010} |
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356 | |
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357 | task: |
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358 | \begin{enumerate} |
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359 | \item express MDRecords in RDF |
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360 | \item identify related ontologies/vocabularies (category -> vocabulary) |
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361 | \item implement (reuse) a lookup/mapping function (Vocabulary Alignement Service? CATCH-PLUS?) |
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362 | |
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363 | \fbox{ function lookup: Category x String -> ConceptualDomain} |
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364 | |
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365 | Normally this would be served by dedicated controlled vocabularies, but expect also some string-normalizing preprocessing etc. |
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366 | \end{enumerate} |
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367 | |
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368 | |
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369 | |
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370 | \subsection{Semantic Search} |
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371 | |
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372 | Main purpose for the undertaking described in previous two chapters (mapping of concepts and entities) is to enhance the search capabilities of the MDService serving the Metadata/Resources-data. Namely to enhance it by employing ontological resources. |
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373 | Mainly this enhancement shall mean, that the user can access the data indirectly by browsing one or multiple ontologies, |
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374 | with which the data will then be linked. These could be for example ontologies of Organizations and Projects. |
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375 | |
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376 | In this section we want to explore, how this shall be accomplished, ie how to bring the enhanced capabilities to the user. |
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377 | Crucial aspect is the question how to deal with the even greater amount of information in a user-friendly way, ie how to prevent overwhelming, intimidating or frustrating the user. |
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378 | |
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379 | Semi-transparently means, that primarily the semantic mapping shall integrate seamlessly in the interaction with the service, but it shall "explain" - offer enough information - on demand, for the user to understand its role and also being able manipulate easily. |
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380 | |
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381 | ? |
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382 | Facets |
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383 | Controlled Vocabularies |
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384 | Synonym Expansion (via TermExtraction(ContentSet)) |
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385 | |
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386 | \subsection{Linked Data - Express dataset in RDF} |
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387 | |
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388 | Partly as by-product of the entities-mapping effort we will get the metadata-description rendered in RDF, linked with |
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389 | So theoretically we then only need to provide them "on the web", to make them a nucleus of the LinkedData-Cloud. |
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390 | |
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391 | Practically this won't be that straight-forward as the mapping to entities will be a hell of a work. |
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392 | But once that is solved, or for the subsets that it is solved, the publication of that data on the "SemanticWeb" should be easy. |
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393 | |
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394 | Technical aspects (RDF-store?) / interface (ontology browser?) |
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395 | |
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396 | defining the Mapping: |
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397 | \begin{enumerate} |
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398 | \item convert to RDF |
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399 | translate: MDREcord -> [\#mdrecord \#property literal] |
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400 | \item map: \#mdrecord \#property literal -> [\#mdrecord \#property \#entity] |
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401 | \end{enumerate} |
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402 | |
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403 | \subsection{Content/Annotation} |
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404 | AF + DCR + RR |
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405 | |
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406 | |
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407 | \subsection{Visualization} |
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408 | Landscape, Treemap, SOM |
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409 | |
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410 | Ontology Mapping and Alignement / saiks/Ontology4 4auf1.pdf |
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411 | |
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412 | |
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413 | \section{System Design} |
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414 | SOA |
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415 | |
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416 | \subsection{Architecture} |
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417 | |
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418 | Makes use of mulitple Components of the established infrastructure (CLARIN ) \cite{Varadi2008}, \cite{Broeder2010}: |
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419 | |
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420 | \begin{itemize} |
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421 | \item Data Category REgistry, |
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422 | \item Relation Registry |
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423 | \item Component Registry |
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424 | \item Vocabulary Alignement Service |
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425 | \end{itemize} |
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426 | merging the pieces of information provided by those, |
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427 | offering them semi-transaprently to the user (or application) on the consumption side. |
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428 | |
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429 | |
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430 | \subsection{CMDI} |
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431 | |
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432 | MDBrowser |
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433 | MDService |
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434 | |
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435 | \subsection{Query Language} |
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436 | CQL? |
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437 | |
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438 | \subsection{User Interface} |
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439 | |
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440 | \subsubsection{Query Input} |
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441 | |
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442 | \subsubsection{Columns} |
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443 | |
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444 | \subsubsection{Summaries} |
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445 | |
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446 | \subsubsection{Differential Views} |
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447 | Visualize impact of given mapping in terms of covered dataset (number of matched records). |
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448 | |
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449 | \section{Evaluation} |
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450 | |
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451 | \subsection{Research Questions } |
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452 | |
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453 | |
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454 | \subsection{Sample Queries} |
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455 | |
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456 | candidate Categories: |
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457 | ResourceType, Format |
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458 | Genre, Topic |
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459 | Project, Institution, Person, Publisher |
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460 | |
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461 | \subsection{Usability} |
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462 | |
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463 | \section{Conclusions and Futur Work} |
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464 | |
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465 | \section{Questions, Remarks} |
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466 | |
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467 | \begin{itemized} |
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468 | \item How does this relate to federated search? |
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469 | \item ontologicky vs. semaziologicky (Semanticke priznaky: kategoriálne/archysémy, difernciacne, specifikacne) |
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470 | \end{itemized} |
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471 | |
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472 | |
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473 | \bibliographystyle{ieee} |
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474 | \bibliography{../../../2bib/lingua,../../../2bib/ontolingua} |
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475 | |
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476 | |
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477 | \end{document} |
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