Pablo de la Fuente

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Verified

Pablo verified their affiliation via an institutional email.

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• PhD
• Professor (Associate) at University of Valladolid

Slides

The publication of semantic web data, commonly represented in Resource Description Framework (RDF), has experienced outstanding growth over the last few years. Data from all fields of knowledge are shared publicly and interconnected in active initiatives such as Linked Open Data. However, despite the increasing availability of applications managing...

This paper surveys the main data models used in projects including the management of changes in digital normative legislation. Models have been classified based on a set of criteria, which are also proposed in the paper. Some projects have been chosen as representative for each kind of model. The advantages and problems of each type are analysed, a...

Overview of the implementation of social web technologies in Spanish university libraries. The research made it possible to determine, among other issues, the reasons why these libraries use (or not) the social web, which 2.0 services are used more and less and for what purposes, obstacles faced by the libraries in carrying out a process of this ty...

Los movimientos de acceso abierto impulsan a los organismos principalmente estatales a publicar sus datos lo más pronto posible. Las tecnologías de Linked Data ayudan en esta dirección. En este artículo se presentan conceptos y herramientas que pueden ser útiles para implementar proyectos de Linked Data, así como también algunas aplicaciones al gob...

The Open Access Initiative primary encourage state agencies to publish their data as soon as possible. The Linked Data Technologies help in this direction.This article introduces concepts and tools that can help to implement projects of Linked Data, as well as some applications in e-Government. Our goal is to provide an overview of this new area an...

The Open Access Initiative primary encourages state agencies to publish their data as soon as possible. Linked Data Technologies help in this direction. This article introduces concepts and tools that can help to implement projects of Linked Data, as well as some applications in e-Government. Our goal is to provide an overview of this new area and...

This paper presents Edge-Guided (E-G), an optimized text preprocessing technique for compression purposes. It transforms the original text into a word net, which stores all relationships between adjoining words. A specific directed graph is proposed to model this transformation: words are stored in vertices, whereas edges represent word transitions...

Understanding how users tailor their SPARQL queries is crucial when designing query evaluation engines or fine-tuning RDF stores with performance in mind. In this paper we analyze 3 million real-world SPARQL queries extracted from logs of the DBPedia and SWDF public endpoints. We aim at finding which are the most used language elements both from sy...

Previous RDF visualization tools generally use node-link representations of the RDF graph to visualize its information. This approach may be enough for small data sets, but it becomes unmanageable as the number of triples increases. Despite advanced node-merging and layout algorithms exist, their outcome do not provide a clear view of the overall R...

Muchas universidades en el mundo han comenzado a implementar repositorios digitales al disponer de herramientas de software libre para su construcción. Es necesario que paralelamente se implementen estrategias y modelos de preservación digital para evitar la pérdida de información en el futuro por diferentes factores tales como la obsolescencia de...

Search tools carry out a crucial role in the expansion of the mobile web. Despite the overwhelming evolution of mobile devices, user input still fails to provide a seamless user experience. To improve this sit-uation we propose a thesaurus as knowledge-based recommender system, which acts as aid tool in query construction phase by providing seman-t...

Summary form only given.The hierarchical Edge-Guided techniques (called E-Gfc) enhance the original E-G approach to support high-order text statistics. These consider the same graph-based model to represent an extended input alphabet obtained by using a variant of the Re-Pair algorithm. E-Gfc adapts the previous coding scheme to grasp the features...

We present novel query algorithms that efficiently support some popular XPath operations over LZCS-transformed documents. The LZCS transformation compresses a redundant XML collection without loss. The main idea of LZCS, inspired by Lempel-Ziv compression, is to replace whole substructures by previous occurrences thereof, and our algorithms try to...

Web search is a frequent activity on Internet connected devices, yet still a nuisance when user is using a mobile device, taking into consideration their limited keypad and screen, and that search results could be mostly irrelevant for the user needs given its mobile context. When in move, the user needs an efficient way to introduce query terms an...

La extracción de la estructura implícita en el contenido de los textos legislativos y su posterior representación de forma explícita a través del marcado XML es uno de los pilares del trabajo desarrollado en la Universidad de Valladolid por el grupo de investigación que se ocupa de la manipulación electrónica de textos legislativos. Esta solución p...

Many Web pages are clearly related to specific locations. Identifying this geographic focus is the cornerstone of the next generation of geographic context aware search services. This paper shows a multistage method for assigning a geographic focus to Web pages (GeoReferencing), using several heuristics for toponym disambiguation and a scoring func...

The amount of information that is stored in digital form in more than one language is growing very fast as a consequence of the globalization. Furthermore, there are countries and supra-national entities whose legislation enforces the translation (and storage) of all the official texts into all their official languages. Two texts that are mutual tr...

The word-codeword mapping technique allows words to be managed in PPM modelling when a natural language text file is being compressed. The main idea for managing words is to assign them codes in order to improve the compression. The previous work was focused on proposing several mapping adaptive algorithms and evaluating them. In this paper, we pro...

This work presents some of the results from a study analyzing the effects of interface customization on user tasks. The study was developed in the context of an interface developed for specialists visiting a Virtual Museum. The information about the time used to complete a task has been collected to acquire quantitative data. The observations were...

After the main conference had concluded, a number of workshops were held from Wednesday afternoon to Friday: Cross language Evaluation Forum (CLEF), International Web Archiving Workshop (IWAW), Foundations on Digital Libraries (DLFoundations 2008), Digital Object Repository Systems in Digital Libraries (DORSDL2), Information Access to Cultural Heri...

The geographic scope of Web pages is becoming an essential dimension of Web search, especially for mobile users. This paper shows a multistage method for assigning a geographic focus to Web pages (GeoReferencing) according to their text contents. We suggest several heuristics for the disambiguation toponyms and a scoring procedure for focus determi...

This paper describes a concrete partial implementation of the DELOS Reference Model to the particular field of manuscripts and incunabula, and how an agile software methodology, SCRUM, suits the evolutive nature of Digital Libraries, solving misunderstandings and lightening the underlying model.

Although e-books usage has a positive impact in educational environments, contents representation is a complex issue given their audience. In this paper, we show a flexible and functional appearance that allows a synchronized consultation of the literary editions integrated in an electronic work.

Groupware systems are closely related with factors which define organization and knowledge of the group. Taking into account these factors are very variable, development and management processes of these systems are complex and need adaptable infrastructure which guarantees their correct evolution. From this need, we propose AGORA as a layered arch...

Purpose – This paper aims to present the concept of electronic work, such as an e‐book integrator of concerns (logical structure, appearance and functionality), for representing literary texts available in electronic heterogeneous environments. Design/methodology/approach – From the generic description of an e‐book and the descriptive requirements...

Resumen. En este artículo presentamos nuevos algoritmos de consulta sobre doc-umentos comprimidos mediante la transformación LZCS, que permite realizar algu-nas de las operaciones más habituales de XPath. La transformación LZCS permite comprimir sin pérdida colecciones de documentos XML. LZCS está inspirado en las técnicas Lempel-Ziv cuya idea suby...

References to parts of structured documents use their structure to locate the piece of document which is the reference target. On the other hand, XML has become an increasingly important language for structured documents. One of its most important related languages is XPath, the language that permits fragments of XML documents to be selected. In th...

We describe a novel compression technique for natural language text collections which takes advantage of the information provided by edges when a graph is used to model the text. This technique is called edge-guided compression. We propose an algorithm that allows the text to be transformed in agreement with the edge-guided technique in conjunction...

Considering that the use of e-books has an important impact in educational environments, we work for getting a competitive and reliable entity for publishing classic literature in the Spanish environment by means of a digital library which helps us to distribute, in an organized way, these electronic documents in Internet. Although currently this c...

Aqueducts define a variant of the pipe-filter style designed to handle and manage semi-structured data streams, including those describing system structures themselves, such as XML-based architecture descriptions. This style is based on the concept of aqueduct, a higher-order filter which comprises a sequence of filters able to define a process log...

Groupware systems are closely related with factors which define organization and knowledge of the group. Considering these factors are very variable, development and management processes of groupware systems are complex and require adaptable infrastructure which guarantees their evolution. From this need, we propose AGORA as a layered architecture...

This paper presents, from e-book features, the concept of electronic work as a medium for publishing classic literature in different editions demanded by the Spanish educational system. The electronic work is an entity which, focused in its logical structure, provides a set of interaction services designed by means of Aqueducts, a processing model...

We describe a compression model for semistructured documents, called Structural Contexts Model (SCM), which takes advantage of the context information usually implicit in the structure of the text. The idea is to use a separate model to compress the text that lies inside each different structure type (e.g., different XML tag). The intuition behind...

This paper presents a system of searching and recovering educational activities that follow the Web-Quest model through the web, complemented with a module to make semantic annotations aimed at getting and enriching the knowledge on the use of these exercises by the teaching community. It also tries to document the resources or websites with didact...

Publicación ISI Email : jadiego@infor.uva.es; gnavarro@dcc.uchile.cl; pfuente@infor.uva.es The authors describe Lempel-Ziv to Compress Structure (LZCS), a novel Lempel-Ziv approach suitable for compressing structured documents. LZCS takes advantage of repeated substructures that may appear in the documents, by replacing them with a backward referen...

Context has long been considered very useful to help the user assess the actual relevance of a document. In web searching, context can help assess the relevance of a web page by showing how the page is related to other pages in the same web site, for example. Such information is very difficult to convey and visualize in a user friendly way. In this...

En: Comunicar : revista científica iberoamericana de comunicación y educación Huelva 2007, v. XV, n. 28, marzo ; p. 191-196 Se presenta un sistema de búsqueda y recuperación de metadatos de actividades educativas, de nivel anterior al universitario, que siguen el modelo WebQuest. El sistema, denominado en su primera versión Biblioteca Virtual de We...

We describe a simple and efficient scheme which allows words to be managed in PPM modelling when a natural language text file is being compressed. The main idea for managing words is to assign them codes to make them easier to manipulate. A general technique is used to obtain this objective: a dictionary mapping on PPM modelling. In order to test o...

The well-known Separation of Concerns Principle has been revisited by recent research, suggesting to go beyond the limits of traditional modularization. This has led to the definition of an orthogonal, invasive composition relationship, which can be used all along the software development process, taking several different forms. The object-like ent...

Modularization is a traditional consequence of the Principle of Separate of Concerns, which states that different abstractions should be dealt with in separate entities. Interactions between these entities define compositional structures, which are studied by Software Architecture. Recent research has revisited the original Principle, suggesting a...

Summary form only given. We explore the use of words as the basic unit in PPM. Our goal has been carried out following two different ways: (1) we have added an additional previous layer to PPM that allows to replace words by two bytes codewords, and then these codewords will be codified with a conventional PPM; and (2) we have modified PPM so that...

obtener un resultado extensible y fácilmente adaptable a la evolución del grupo y/o las necesidades de sus miembros (a nivel tecnológico).

The use of the UML specification language is very widespread due to some of its features. However, the ever more complex systems of today require modelling methods that allow errors to be detected in the initial phases of development. The use of formal methods makes such error detection possible but the learning cost is high. This paper presents a...

An application to the legal domain of information extraction is presented. Its goal is to automate the extraction of references from legal documents, their resolution, and the storage of their information in order to facilitate an automatic treatment of these information items by services offered in digital libraries. References are extracted match...

We describe a compression technique for semistructured documents, called SCMPPM, which combines the prediction by partial matching technique with structural contexts model (SCM) technique. SCMPPM takes advantage of the context information usually implicit in the structure of the text. The idea is to use a separate PPM model to compress the text tha...

This document studies in some detail the recently developed concept of aspect at the architecture level. This concept introduces a novel kind of modularization and composition in software, and therefore it defines new structures which must be studied by Software Architecture, determining the architectural features of aspects. However the opposite s...

Current software development methodologies recognize the critical importance of the architectural concerns during the design phase. Software Architecture promises to be the solution for a number of recurring problems; but to do so, the first task is to be able to obtain a precise description of a system architecture. In late years, a number of spec...

The use of the UML specification language is very widespread due to some of its features. However, the ever more complex systems of today require modeling methods that allow errors to be detected in the initial phases of development. The use of formal methods make such error detection possible but the learning cost is high.This paper presents a too...

This document studies in some detail the recently developed concept of aspect at the architecture level. This concept introduces a novel kind of modularization and composition in software, and therefore it defines new structures which must be studied by Software Architecture, determining the architectural features of aspects. However the opposite s...

Palabras clave : Referencias, extracción de información, textos jurídicos Résumé Nous présentons une application de l'extraction d'information au domaine juridique. Le but est d'automatiser l'extraction de références des documents juridiques (par un analyse du contenu). Les informations concernant les références extraites sont stockées, et utilisée...

Architectural connectors are defined as the elements which explicitly capture essential interaction and multiparty protocols at the architecture descrip- tion level. Therefore higher-order interaction abstractions such as coordination and adaptation are also described within them. However, atomic connectors can only capture coordination of a basic...

The Software Architecture discipline is devoted to the study and description of structures, created by the composition of software modules. At the same time, the most important merit of Aspect Orientation is the fact that it introduces a new kind of modularization, deployed in a range of new dimensions, orthogonally to traditional models. These fie...

Past research has proved that graphical user interfaces (GUIs) can significantly improve the effectiveness of the information access task. Our work is based on the consideration that structured document retrieval requires different user graphical interfaces from standard information retrieval. In structured document retrieval a GUI has to enable a...

We describe a novel Lempel-Ziv approach suitable for compressing structured documents, called LZCS, which takes advantage of redundant information that can appear in the structure. The main idea is that frequently repeated subtrees may exist and these can be replaced by a backward reference to their rst ocurrence. The main advantage is that compres...

We describe a compression technique for semistructured documents, called SCMPPM, which combines the Prediction by Partial Matching (PPM) technique with the Structural Contexts Model (SCM) idea, which takes advantage of the context information usually implicit in the structure of the text. The idea is to use a separate PPM model to compress the text...

Interaction analysis is a core function for the support of coaching and evaluation in CSCL. It relies on information captured from the actions performed by the participants during the collaborative process. This information includes data of distinct nature and format, which demands a flexible and standardised data representation, adaptable to diffe...

We describe a compression model for semistructured documents, called Structural Contexts Model, which takes advantage of the context information usually implicit in the structure of the text. The idea is to use a separate semiadaptive model to compress the text that lies inside each different structure type (e.g., different XML tag). The intuition...

XML seems to be the preferred standard for legal documents. Several DTDs have been created specifically for these documents by public institutions and private legal publishers, and work continues with the adaptation of the additional legislation for XML representation. We present an approach to automate information extraction processes from leg...

User interfaces are designed taking in account different user needs (preferences, abilities, etc.) and various prototypes and usability tests are carried out during their development. However, when they are used by their final users, it can be seen that the interfaces do not meet the users requirements or, more usually, it is evident that the UI ca...

Studying and evaluating real experiences that promote active and collaborative learning is a crucial field in CSCL. Major issues that remain unsolved deal with the merging of qualitative and quantitative methods and data, especially in educational settings that involve both physical and computer-supported collaboration. In this paper we present a m...

Interaction analysis is a core function for the support of coaching and evaluation in CSCL. It relies on information captured from the actions of the participants while they are performing the collaborative activities. This information includes data from distinct nature and format, which demands a flexible and standardised data representation, adap...

In the Web search process people often think that the hardest work is done by the search engines or by the directories which are entrusted with finding the Web pages. While this is partially true, a not less important part of the work is done by the user, who has to decide which page is relevant from the huge set of retrieved pages. In this paper w...

We describe a compression model for semistructured documents, called Structural Contexts Model, which takes advantage of the context information usually implicit in the structure of the text. The idea is to use a separate semiadaptive model to compress the text that lies inside each dierent structure type (e.g., different XML tag). The intuition be...

The development of methods and tools that support formative evaluation in Computer Supported Collaborative Learning (CSCL) is a strategic research subject for the improvement of this area, which is still in an incipient status. According to the current learning theories, the evaluation of collaborative learning has to be based on the study of inter...

Interaction analysis is a core function for the support of coaching and evaluation in CSCL. It relies on information captured from the actions performed by the participants during the collaborative process. This information includes data of distinct nature and format, which demands a flexible and standardised data representation, adaptable to diffe...

1. MOTIVATIONS Standard Information Retrieval (IR) deals with documents as they were atomic entities, indexing and retrieving them as single objects. However, modern IR needs to be able to deal with more elaborate document representations, like for example structured documents, that is documents that are organised around a well defined structure. T...

The indexing techniques most commonly applied in information retrieval systems associate weights to the terms of documents; this association is carried out in order to quantify the term’s capacity for representing the document. Subsequently, these weights are used in query processing, playing an important role in the performance of the system. This...

Structured document retrieval requires different user graph- ical interfaces from standard Information Retrieval. An Information Re- trieval system dealing with structured documents has to enable a user to query, browse retrieved documents, provide query refinement and rel- evance feedback based not only on full documents, but also on specific docu...

Software Architecture studies the structure of software systems, as described by Architecture Description Languages (Adls). When these capture structures of change, they are comparable to Coordination Languages. Previous work suggests that the combination with Reflection concepts renders a general framework for the description of such evolving stru...

Document evolution is usually performed by creating a new document which explicitly details changes to specific paragraphs inside other document content. Obtaining (virtual) document versions corresponding to its state at a specific date is left to document users, who manually extract from library collections, and compose, the pieces of text needed...

This document describes the structure of PiLar, an Architectural Description Language based on concepts from the field of Reflection, following a proposal suggested in previous work. First, motivations and ideas behind its design are outlined. Next, the language is divided in two parts: a declarative Structural Language, which makes possible to def...

Las bibliotecas digitales deben almacenar de forma eficiente grandes cantidades de información y además deben disponer de mecanismos que permitan realizar búsquedas y recuperar información, a veces multimedia, en el menor tiempo posible. Aunque en la actualidad el coste del almacenamiento no se considera un problema, ciertos entornos de ejecución (...

El desarrollo de las bibliotecas digitales ha propiciado la posibilidad de acceso a un fondo, cada día más amplio, de información que de otro modo sería inaccesible o de difícil acceso para el público en general y, aún muchas veces, para los investigadores especializados. Desde el proyecto Gutenberg, han aparecido numerosas experiencias de bibliote...

Una parte considerable del esfuerzo realizado en el campo de las bibliotecas digitales ha estado relacionado, desde el principio, con la difusión de los fondos notables, especialmente los textos antiguos, que poseían las bibliotecas tradicionales. Esto ha permitido, en muchas ocasiones, que fondos de difícil acceso estén ahora al alcance de lectore...

Los pasados 19 y 20 de Noviembre se celebraron en Almagro las Jornadas de Bibliotecas Digitales 2001, que son las segundas que con ese título se realizan España. Las Jornadas de este pasado año han supuesto la consolidación de la experiencia iniciada en Valladolid en el año 2000. La participación ha sido muy apreciable, unas 90 personas, casi todas...

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Rule evolution is usually performed by creating a new document which explicitly details changes to specific parts inside other rules’s content. Obtaining (virtual) document versions corresponding to a rules’s state at a specific date is thus left to document users, who manually extract from library collections, and compose, the pieces of text neede...

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