HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci-entific ... more HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci-entific research documents, whether they are pub-lished or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et a ̀ la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
In this paper, we present SHIRI-Annot, an automatic ontology- driven and unsupervised approach fo... more In this paper, we present SHIRI-Annot, an automatic ontology- driven and unsupervised approach for the semantic annotation of doc- uments which contain more or less structured parts. The aim of this approach is to build an integration system called SHIRI 3 which allows the user access to documents related to a specific domain. In this sys- tem, the querying process is guided by an ontology of the domain and the answers are only made of the pertinent parts of the documents unlike keywords-based search engines. The ontology is described using RDFS (Resource Description Framework Schema) language. The SHIRI-Annot approach consists of locating and then annotating concept instances and their semantic relations. The locating step combines existing annotation approaches in order to locate instances in the text. The annotation step exploits a set of metadata and a set of logical rule patterns which are automatically instanciated from the domain description. These metadata are provided from ...
To move the web from a Web of documents to a Web of data commonly named semantic web, it is obvio... more To move the web from a Web of documents to a Web of data commonly named semantic web, it is obviously necessary to extract objects as terms and named entities that support a substantial proportion of texts semantic. This step could be the basis for existing web annotation which can improve the precision in handling documents for applications. The rapid growing of the web make impossible doing this manually. Many extraction and annotation techniques are used to resolve the first and easyiest problem of information search which is finding documents containing the searched data. In this work we proposed an experimentation of improvements on a model that allow locating and extracting the more exact parts of documents that correspond to the user request. This work extends SHIRI 1 which is an ontology-based system for integration of semi-structured documents related to a specific domain. The ontology is described by a set of concepts, relations and their properties. It also contains a lex...
In the construction of the semantic web, scientists use to annotate the existing web to improve t... more In the construction of the semantic web, scientists use to annotate the existing web to improve the precision in handling documents for applications. The rapid growing of the web make impossible doing this manually. Many annotation techniques are used to resolve the first and easiest problem of information search which is finding documents containing the searched data. In this work we proposed a deep annotation model for locating and extracting the more exact parts of the documents that correspond to the responses of the request. This work extends SHIRI1 which is an ontology-based system for integration of semi-structured documents related to a specific domain. The ontology is described by a set of concepts, relations and their properties. It also contains a lexical part. It relies on an automatic, unsupervised and ontology-driven approach for extraction, alignment and querying for semantic annotation of tagged elements of documents. In this paper we focus on two major improvements:...
2015 3rd International Conference on Control, Engineering & Information Technology (CEIT), 2015
Ontology is by definition explicit and shared conceptualization of a domain, its life cycle is th... more Ontology is by definition explicit and shared conceptualization of a domain, its life cycle is then marked by sequences of change operations in order to adapt changes in the renewal of the knowledge domain. Each operation leading to a state of inconsistency on a target component is therefore susceptible to change the status of other components and therefore the state of the ontology at the macroscopic level. We use cooperative game theory to build a probabilistic measure of inconsistencies and calculate the induced degree of disorder based on Shannon entropy. We propose a selection algorithm for inconsistencies resolution based on information gain or lost after each change operation.
ABSTRACT Ontology is by definition explicit and shared conceptualization of a domain, its life cy... more ABSTRACT Ontology is by definition explicit and shared conceptualization of a domain, its life cycle is then marked by sequences of change operations in order to adapt changes in the renewal of the domain. Each operation leading to a state of inconsistency on a target component is therefore susceptible to change the status of other components and therefore the state of the ontology at the macroscopic level through the effect of disorder induced on components as a tendency to the disorganization of the ontological system also called entropy. In this paper, by using an approach combining entropy measure of Shannon and previous work on ontology change operations satisfiability, we propose a methodology for measuring entropy issued from a change operation. The essential issue is how to measure the average information provided by the knowledge of the state of a component after change operation resulting in change impacts on the overall consistency of the ontology.
Abstract. SHIRI 1 is an ontology-based system for integration of semistructured documents related... more Abstract. SHIRI 1 is an ontology-based system for integration of semistructured documents related to a specific domain. The system’s purpose is to allow users to access to relevant parts of documents as answers to their queries. SHIRI uses RDF/OWL for representation of resources and SPARQL for their querying. It relies on an automatic, unsupervised and ontology-driven approach for extraction, alignment and semantic annotation of tagged elements of documents. In this paper, we focus on the Extract-Align algorithm which exploits a set of named entity and term patterns to extract term candidates to be aligned with the ontology. It proceeds in an incremental manner in order to populate the ontology with terms describing instances of the domain and to reduce the access to extern resources such as Web. We experiment it on a HTML corpus related to call for papers in computer science and the results that we obtain are very promising. These results show how the incremental behaviour of Extra...
In the context of the SIC-Senegal project, which brings together partners willing to share data r... more In the context of the SIC-Senegal project, which brings together partners willing to share data related to the development of the Senegal River Valley, we proposed a bottom- up integration approach. The construction of XML documents warehouses (dataweb) from data of each partner allows to propose a solution to the problems of structural heterogeneity. A basic ontology-based knowledge is then
Abstract Ontologies are one of the most important layers on semantic web. Inconsistencies observe... more Abstract Ontologies are one of the most important layers on semantic web. Inconsistencies observed on cascading changes of thousands of nodes may arise simply because of a small operation on an ontology component. We proposed in this paper an approach that ...
Résumé. Nous présentons une approche automatique d'enrichissement séman- tique de documents H... more Résumé. Nous présentons une approche automatique d'enrichissement séman- tique de documents HTML qui exploite une description du domaine, plus préci- sément un ensemble de concepts, leurs propriétés, leurs relations, les cardinalités associées et leurs caractéristiques contextuelles pour enrichir sémantiquement le contenu des documents. Le processus d'enrichissement consiste à repérer des instances de concepts et de propriétés tout en gardant l'intégralité
Conference en Recherche d'Infomations et Applications, 2010
tournées. ABSTRACT. This paper presents SHIRI-Querying, an approach for semantic search in semi- ... more tournées. ABSTRACT. This paper presents SHIRI-Querying, an approach for semantic search in semi- structured documents. We propose a solution to tackle incompleteness and imprecision of an- notations at querying time. This solution relies on two elementary reformulation types that use the notion of aggregation and the documents structure. We present the dynamic algorithm (DREQ) which combines these elementary transformations to
... Table 2 shows that thanks to term patterns, the concept T opic is enriched of 78% de terms. O... more ... Table 2 shows that thanks to term patterns, the concept T opic is enriched of 78% de terms. Other named entities have been also found with good precision and recall for affiliations which are often described using complex terms. ...
Communications in Computer and Information Science, 2011
Ontology undergoes successive phases of evolution in the context of engineering. Taking into acco... more Ontology undergoes successive phases of evolution in the context of engineering. Taking into account successive modification impacts is of a particular importance, the least change causing an imbalance of the ontology badly taken into account can involve a dysfunction ...
This paper presents SHIRI-Querying, an approach for semantic search on semi-structured documents.... more This paper presents SHIRI-Querying, an approach for semantic search on semi-structured documents. We propose a solution to tackle incompleteness and imprecision of semantic annotations of semistructured documents at querying time. We particularly introduce three elementary reformulations that rely on the notion of aggregation and on the document structure. We present the Dynamic Reformulation and Execution of Queries algorithm (DREQ) which
HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci-entific ... more HAL is a multi-disciplinary open access archive for the deposit and dissemination of sci-entific research documents, whether they are pub-lished or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et a ̀ la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
In this paper, we present SHIRI-Annot, an automatic ontology- driven and unsupervised approach fo... more In this paper, we present SHIRI-Annot, an automatic ontology- driven and unsupervised approach for the semantic annotation of doc- uments which contain more or less structured parts. The aim of this approach is to build an integration system called SHIRI 3 which allows the user access to documents related to a specific domain. In this sys- tem, the querying process is guided by an ontology of the domain and the answers are only made of the pertinent parts of the documents unlike keywords-based search engines. The ontology is described using RDFS (Resource Description Framework Schema) language. The SHIRI-Annot approach consists of locating and then annotating concept instances and their semantic relations. The locating step combines existing annotation approaches in order to locate instances in the text. The annotation step exploits a set of metadata and a set of logical rule patterns which are automatically instanciated from the domain description. These metadata are provided from ...
To move the web from a Web of documents to a Web of data commonly named semantic web, it is obvio... more To move the web from a Web of documents to a Web of data commonly named semantic web, it is obviously necessary to extract objects as terms and named entities that support a substantial proportion of texts semantic. This step could be the basis for existing web annotation which can improve the precision in handling documents for applications. The rapid growing of the web make impossible doing this manually. Many extraction and annotation techniques are used to resolve the first and easyiest problem of information search which is finding documents containing the searched data. In this work we proposed an experimentation of improvements on a model that allow locating and extracting the more exact parts of documents that correspond to the user request. This work extends SHIRI 1 which is an ontology-based system for integration of semi-structured documents related to a specific domain. The ontology is described by a set of concepts, relations and their properties. It also contains a lex...
In the construction of the semantic web, scientists use to annotate the existing web to improve t... more In the construction of the semantic web, scientists use to annotate the existing web to improve the precision in handling documents for applications. The rapid growing of the web make impossible doing this manually. Many annotation techniques are used to resolve the first and easiest problem of information search which is finding documents containing the searched data. In this work we proposed a deep annotation model for locating and extracting the more exact parts of the documents that correspond to the responses of the request. This work extends SHIRI1 which is an ontology-based system for integration of semi-structured documents related to a specific domain. The ontology is described by a set of concepts, relations and their properties. It also contains a lexical part. It relies on an automatic, unsupervised and ontology-driven approach for extraction, alignment and querying for semantic annotation of tagged elements of documents. In this paper we focus on two major improvements:...
2015 3rd International Conference on Control, Engineering & Information Technology (CEIT), 2015
Ontology is by definition explicit and shared conceptualization of a domain, its life cycle is th... more Ontology is by definition explicit and shared conceptualization of a domain, its life cycle is then marked by sequences of change operations in order to adapt changes in the renewal of the knowledge domain. Each operation leading to a state of inconsistency on a target component is therefore susceptible to change the status of other components and therefore the state of the ontology at the macroscopic level. We use cooperative game theory to build a probabilistic measure of inconsistencies and calculate the induced degree of disorder based on Shannon entropy. We propose a selection algorithm for inconsistencies resolution based on information gain or lost after each change operation.
ABSTRACT Ontology is by definition explicit and shared conceptualization of a domain, its life cy... more ABSTRACT Ontology is by definition explicit and shared conceptualization of a domain, its life cycle is then marked by sequences of change operations in order to adapt changes in the renewal of the domain. Each operation leading to a state of inconsistency on a target component is therefore susceptible to change the status of other components and therefore the state of the ontology at the macroscopic level through the effect of disorder induced on components as a tendency to the disorganization of the ontological system also called entropy. In this paper, by using an approach combining entropy measure of Shannon and previous work on ontology change operations satisfiability, we propose a methodology for measuring entropy issued from a change operation. The essential issue is how to measure the average information provided by the knowledge of the state of a component after change operation resulting in change impacts on the overall consistency of the ontology.
Abstract. SHIRI 1 is an ontology-based system for integration of semistructured documents related... more Abstract. SHIRI 1 is an ontology-based system for integration of semistructured documents related to a specific domain. The system’s purpose is to allow users to access to relevant parts of documents as answers to their queries. SHIRI uses RDF/OWL for representation of resources and SPARQL for their querying. It relies on an automatic, unsupervised and ontology-driven approach for extraction, alignment and semantic annotation of tagged elements of documents. In this paper, we focus on the Extract-Align algorithm which exploits a set of named entity and term patterns to extract term candidates to be aligned with the ontology. It proceeds in an incremental manner in order to populate the ontology with terms describing instances of the domain and to reduce the access to extern resources such as Web. We experiment it on a HTML corpus related to call for papers in computer science and the results that we obtain are very promising. These results show how the incremental behaviour of Extra...
In the context of the SIC-Senegal project, which brings together partners willing to share data r... more In the context of the SIC-Senegal project, which brings together partners willing to share data related to the development of the Senegal River Valley, we proposed a bottom- up integration approach. The construction of XML documents warehouses (dataweb) from data of each partner allows to propose a solution to the problems of structural heterogeneity. A basic ontology-based knowledge is then
Abstract Ontologies are one of the most important layers on semantic web. Inconsistencies observe... more Abstract Ontologies are one of the most important layers on semantic web. Inconsistencies observed on cascading changes of thousands of nodes may arise simply because of a small operation on an ontology component. We proposed in this paper an approach that ...
Résumé. Nous présentons une approche automatique d'enrichissement séman- tique de documents H... more Résumé. Nous présentons une approche automatique d'enrichissement séman- tique de documents HTML qui exploite une description du domaine, plus préci- sément un ensemble de concepts, leurs propriétés, leurs relations, les cardinalités associées et leurs caractéristiques contextuelles pour enrichir sémantiquement le contenu des documents. Le processus d'enrichissement consiste à repérer des instances de concepts et de propriétés tout en gardant l'intégralité
Conference en Recherche d'Infomations et Applications, 2010
tournées. ABSTRACT. This paper presents SHIRI-Querying, an approach for semantic search in semi- ... more tournées. ABSTRACT. This paper presents SHIRI-Querying, an approach for semantic search in semi- structured documents. We propose a solution to tackle incompleteness and imprecision of an- notations at querying time. This solution relies on two elementary reformulation types that use the notion of aggregation and the documents structure. We present the dynamic algorithm (DREQ) which combines these elementary transformations to
... Table 2 shows that thanks to term patterns, the concept T opic is enriched of 78% de terms. O... more ... Table 2 shows that thanks to term patterns, the concept T opic is enriched of 78% de terms. Other named entities have been also found with good precision and recall for affiliations which are often described using complex terms. ...
Communications in Computer and Information Science, 2011
Ontology undergoes successive phases of evolution in the context of engineering. Taking into acco... more Ontology undergoes successive phases of evolution in the context of engineering. Taking into account successive modification impacts is of a particular importance, the least change causing an imbalance of the ontology badly taken into account can involve a dysfunction ...
This paper presents SHIRI-Querying, an approach for semantic search on semi-structured documents.... more This paper presents SHIRI-Querying, an approach for semantic search on semi-structured documents. We propose a solution to tackle incompleteness and imprecision of semantic annotations of semistructured documents at querying time. We particularly introduce three elementary reformulations that rely on the notion of aggregation and on the document structure. We present the Dynamic Reformulation and Execution of Queries algorithm (DREQ) which
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